subject:(Nano micro scale)

Penn State University

1. Alam, Md Tarekul. Size effects on mechanical and thermal properties of thin films.

Degree: 2015, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/26485

► Materials, from electronic to structural, exhibit properties that are sensitive to their composition and internal microstructures such as grain and precipitate sizes, crystalline phases, defects… (more)

▼ Materials, from electronic to structural, exhibit properties that are sensitive to their composition and internal microstructures such as grain and precipitate sizes, crystalline phases, defects and dopants. Therefore, the research trend has been to obtain fundamental understanding in processing-structure-properties to develop new materials or new functionalities for engineering applications. The advent of nanotechnology has opened a new dimension to this research area because when material size is reduced to nanoscale, properties change significantly from the bulk values. This phenomenon expands the problem to ‘size-processing-structure-properties-functionalities’. The reinvigorated research for the last few decades has established size dependency of the material properties such as thermal conductivity, Young’s modulus and yield strength, electrical resistivity, photo-conductance etc. It is generally accepted that classical physical laws can be used to scale down the properties up to 25-50 nm length-scale, below which their significant deviation or even breakdown occur. This dissertation probes the size effect from a different perspective by asking the question, if nanoscale size influences one physical domain, why it would not influence the coupling between two or more domains? Or in other words, if both mechanical and thermal properties are different at the nanoscale, can mechanical strain influence thermal conductivity? The hypothesis of size induced multi-domain coupling is therefore the foundation of this dissertation. It is catalyzed by the only few computational studies available in the literature while experimental validations have been non-existent owing to experimental challenges. The objective of this research is to validate this hypothesis, which will open a novel avenue to tune properties and functionalities of materials with the size induced multi-domain coupling. Single domain characterization itself is difficult at the nanoscale due to specimen preparation, setting up proper boundary conditions and the required resolution in measurement. The scope of this work requires multiple property characterization simultaneously, which makes it even more challenging. To accomplish this goal, several micro electro mechanical system (MEMS) based testing devices have been developed in this work. These devices can integrate sample, tiny heaters, electrodes, actuators and sensors to measure not just one property, but multiple properties, at the same time. An additional advantage of the setup is its inherently small size that allows high-resolution microscopy techniques such as transmission electron microscope (TEM) to visualize the events taking place inside the specimen during the experiments. These devices were then used to characterize both single and multi-domain studies as highlighted below. As a first step towards multi-domain characterization, this research explored the mechanical behavior (microstructural effects on deformation and failure) of metallic thin films. For example, in-situ TEM study of aluminum… Advisors/Committee Members: Md Amanul Haque, Dissertation Advisor/Co-Advisor, Md Amanul Haque, Committee Chair/Co-Chair, Zoubeida Ounaies, Committee Member, Donghai Wang, Committee Member, Charles E Bakis, Committee Member.

Subjects/Keywords: Thin films; nano scale; thermal; mechanical; size effect; coupling of properties; micro scale

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APA (6^th Edition):

Alam, M. T. (2015). Size effects on mechanical and thermal properties of thin films. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/26485

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Alam, Md Tarekul. “Size effects on mechanical and thermal properties of thin films.” 2015. Thesis, Penn State University. Accessed April 16, 2021. https://submit-etda.libraries.psu.edu/catalog/26485.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Alam, Md Tarekul. “Size effects on mechanical and thermal properties of thin films.” 2015. Web. 16 Apr 2021.

Vancouver:

Alam MT. Size effects on mechanical and thermal properties of thin films. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Apr 16]. Available from: https://submit-etda.libraries.psu.edu/catalog/26485.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Alam MT. Size effects on mechanical and thermal properties of thin films. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/26485

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado

2. Li, Xiaobo. Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials.

Degree: PhD, Mechanical Engineering, 2012, University of Colorado

URL: https://scholar.colorado.edu/mcen_gradetds/33

► Nano-scale thermal conduction has been an interesting research topic over the past two decades due to the intriguing electron and phonon physics in the… (more)

▼ Nano-scale thermal conduction has been an interesting research topic over the past two decades due to the intriguing electron and phonon physics in the low-dimensional materials, the ever-increasing challenges in the thermal management, and the potentials in using nanostructures for enhanced energy conversion, storage and thermal management. Atomistic simulation methods, such as molecular dynamics (MD) and atomistic Green's function (AGF), have been powerful theoretical tools for understanding and predicting the phonon transport and thermal conduction in nanostructured materials and across dissimilar interfaces. The research conducted in this thesis aims at further developing these atomistic simulation methods and broadening the understanding of phonon transport in nanostructured materials and across the interfaces of dissimilar materials. There is strong artificial simulation-domain-size effect on the prediction of thermal conductivity using equilibrium MD (EMD) for high thermal conductivity materials. In this thesis, spectral method is further developed to avoid the simulation domain size effect and obtain the intrinsic phonon thermal conductivity of materials from EMD simulations. This method is then applied for the study of strain effects on thermal conductivity of low-dimensional nanostructures. We show that thermal conductivity of nanostructures can be greatly tuned by applied mechanical strains. The underlying mechanism on strain/stress tuning of the one-dimensional and two-dimensional nanostructures of carbon and silicon are explained. Phonon transport across dissimilar material interfaces plays a critical role in determining the effective thermal properties of nanostructures. Although AGF has been widely used for the prediction of frequency-dependent phonon transmission across material interfaces, most of the past works have been limited to lattice-matched interfacial structures. In this thesis, an integrated MD and recursive AGF approach is developed to study the frequency-dependent phonon transmission across lattice-mismatched dissimilar interfaces. Due to the induced atomic disorder, lattice mismatch greatly affects the phonon transmission across dissimilar material interface. The reduction of thermal conductance is correlated with adhesion energy at the interface. Further studies are performed for phonon transport across interfaces with defects and specie diffusion. The numerical tools developed in this thesis can be useful for the understandings of phonon transport in nanostructured materials. Advisors/Committee Members: Ronggui Yang, Yung-Cheng Lee, Scott Bunch.

Subjects/Keywords: Atomistic Green's function; Lattice-mismatched iterface; Micro-/nano-scale heat transfer; Phonon transmission; Mechanical Engineering

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APA (6^th Edition):

Li, X. (2012). Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/mcen_gradetds/33

Chicago Manual of Style (16^th Edition):

Li, Xiaobo. “Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials.” 2012. Doctoral Dissertation, University of Colorado. Accessed April 16, 2021. https://scholar.colorado.edu/mcen_gradetds/33.

MLA Handbook (7^th Edition):

Li, Xiaobo. “Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials.” 2012. Web. 16 Apr 2021.

Vancouver:

Li X. Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials. [Internet] [Doctoral dissertation]. University of Colorado; 2012. [cited 2021 Apr 16]. Available from: https://scholar.colorado.edu/mcen_gradetds/33.

Council of Science Editors:

Li X. Phonon Transport across Dissimilar Material Interfaces and in Nanostructured Materials. [Doctoral Dissertation]. University of Colorado; 2012. Available from: https://scholar.colorado.edu/mcen_gradetds/33

Université Montpellier II

3. Wolf, Caroline. Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage.

Degree: Docteur es, Génie des procédés, 2014, Université Montpellier II

URL: http://www.theses.fr/2014MON20217

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Malgré l'intérêt croissant que représente dans le domaine de l'emballage alimentaire la conception raisonnée de structures composites aux propriétés de transfert contrôlées, la compréhension des… (more)

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Malgré l'intérêt croissant que représente dans le domaine de l'emballage alimentaire la conception raisonnée de structures composites aux propriétés de transfert contrôlées, la compréhension des transferts de gaz et de vapeurs avec l'ajout de particules dans des polymères reste complexe. En vue d'apporter un nouvel éclairage à ce verrou scientifique, les travaux de thèse se sont focalisés sur les trois parties suivantes : - contribuer à une meilleure compréhension des transferts de matière dans les composites. Pour ce faire, une analyse exhaustive des données expérimentales de transfert de gaz et de vapeurs disponibles dans la littérature a été menée pour les nano- et micro-composites et une comparaison de ces données a été réalisée avec des modèles de tortuosité, basés sur des paramètres géométriques ; - comprendre et modéliser la perméabilité dans des composites avec deux phases perméables. Pour cela, les transferts de vapeur d'eau dans un composite (fibre de paille/bio-polyester) chargé avec des particules perméables ont été mesurés et décrits en détail, et une comparaison de ces données avec des modèles analytiques issus d'autres champs disciplinaires, prenant en compte la perméabilité dans la particule et dans la matrice, a été menée. Cette étude a mis en avant le manque de modèles adaptés pour la prédiction de la perméabilité dans les composites contenant des particules perméables ; - développer une nouvelle approche multi-échelle pour la prédiction de la perméabilité dans des composites prenant en compte les propriétés de transfert dans les particules et dans la matrice polymérique avec une représentation 2D de la structure du composite. Afin d'atteindre un niveau satisfaisant de validation du modèle, la détermination des paramètres expérimentaux tels que la diffusion dans les particules doit être améliorée. Cette nouvelle approche de modélisation ouvre la voie à la création d'outils d'ingénierie inverse pour le design de structures composites, ajustés aux besoins des aliments en termes de propriétés barrières.

Despite the global growing interest in the food packaging field for the design of tailored composite structures with controlled mass transfer properties, the understanding of the modulation of the mass transfer properties with the incorporation of particles in polymer still remains very complex. In order to throw light on this scientific problem, the thesis work was focused on the following parts: - providing a better understanding of mass transfer in composites. In this purpose an analysis of all experimental gas and vapour permeability data available in the literature has been carried out in nano- and micro- composites and a comparison of these data with predictions from tortuosity models based on few geometrical inputs has been achieved; - performing a detailed study of water vapour mass transfer in composites (wheat straw fibres/bio-polyester). These data were compared with the prediction of bi-phasic analytical models coming from other disciplinary fields. This part of the work has highlighted…

Advisors/Committee Members: Guillard, Valérie (thesis director).

Subjects/Keywords: Modélisation multi-échelle; Nano- et micro-composites; Transfert de gaz et de vapeur; Structure; Multi-Scale modelling; Nano- and micro-Composites; Mass transfer properties; Struture

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APA (6^th Edition):

Wolf, C. (2014). Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage. (Doctoral Dissertation). Université Montpellier II. Retrieved from http://www.theses.fr/2014MON20217

Chicago Manual of Style (16^th Edition):

Wolf, Caroline. “Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage.” 2014. Doctoral Dissertation, Université Montpellier II. Accessed April 16, 2021. http://www.theses.fr/2014MON20217.

MLA Handbook (7^th Edition):

Wolf, Caroline. “Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage.” 2014. Web. 16 Apr 2021.

Vancouver:

Wolf C. Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage. [Internet] [Doctoral dissertation]. Université Montpellier II; 2014. [cited 2021 Apr 16]. Available from: http://www.theses.fr/2014MON20217.

Council of Science Editors:

Wolf C. Multi-scale modelling of structure and mass transfer relationships in nano- and micro-composites for food packaging : Modélisation multi-échelle des relations entre structure et propriétés de transfert de matière dans des nano- et micro-composites pour l'emballage. [Doctoral Dissertation]. Université Montpellier II; 2014. Available from: http://www.theses.fr/2014MON20217

4. Wang, Xudong. Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process.

Degree: Docteur es, Physique, 2020, université Paris-Saclay

URL: http://www.theses.fr/2020UPASV030

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Le frittage des particules d'argent est simulé à plusieurs échelles avec différentes approches numériques. La méthode de la dynamique moléculaire est utilisée pour effectuer les… (more)

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Le frittage des particules d'argent est simulé à plusieurs échelles avec différentes approches numériques. La méthode de la dynamique moléculaire est utilisée pour effectuer les calculs à l'échelle nanométrique. Les modèles composés de particules d'argent de taille nanométrique sont frittés dans diverses conditions. Ensuite, les propriétés mécaniques des structures poreuses produites sont analysées qualitativement par rapport aux paramètres du processus. Dans la deuxième partie, un processus de fabrication similaire est mis en œuvre avec des modèles à micro-échelle. Les simulations sont faites en implémentant dans le programme Surface Evolver avec les mécanismes physiques pertinents. Le frittage à température modérée implique la diffusion en surface et la diffusion au joint de grain. Le comportement de frittage prévu est ensuite discuté sur la base non seulement du modèle de base tel que la paire de particules de taille égale ou inégale, mais également de trois cellules unitaires spécifiques avec le taux de porosité initial différent. Enfin, une application pour le frittage à haute température est présentée en se concentrant sur le mécanisme de diffusion évaporation-condensation.

The sintering of silver particles is simulated at several scales with different numerical approaches. The Molecular Dynamics method is used to carry out the nanoscale calculations. Models composed by silver particles of nanometric size are sintered under various conditions. Then, the mechanical properties of the produced porous structure are analyzed qualitatively with respect to the process parameters. In the second part, similar fabrication process is implemented with microscale models. Simulations are made by implementing in the Surface Evolver program with the relevant physical mechanisms. Sintering at moderate temperature involves surface diffusion and grain boundary diffusion. The predicted sintering behavior is then discussed based on not only the basic model such as equal-size or unequal-size pair of particles, but also three specific tetragonal unit cells with different initial porosity rate. At last, an application for sintering at high temperature is presented by focusing on the evaporation-condensation diffusion mechanism.

Advisors/Committee Members: Benabou, Lahouari (thesis director).

Subjects/Keywords: Simulation; Frittage; Particule d'argent; Dynamique Moléculaire; Surface Evolver; Echelle nano/micro; Simulation; Sintering; Silver particle; Molecular Dynamics; Surface Evolver; Nano/micro scale; 671.373

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APA (6^th Edition):

Wang, X. (2020). Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process. (Doctoral Dissertation). université Paris-Saclay. Retrieved from http://www.theses.fr/2020UPASV030

Chicago Manual of Style (16^th Edition):

Wang, Xudong. “Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process.” 2020. Doctoral Dissertation, université Paris-Saclay. Accessed April 16, 2021. http://www.theses.fr/2020UPASV030.

MLA Handbook (7^th Edition):

Wang, Xudong. “Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process.” 2020. Web. 16 Apr 2021.

Vancouver:

Wang X. Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process. [Internet] [Doctoral dissertation]. université Paris-Saclay; 2020. [cited 2021 Apr 16]. Available from: http://www.theses.fr/2020UPASV030.

Council of Science Editors:

Wang X. Numerical modelling of silver particle sintering at nano- and micro-scale : investigation of the physical mechanisms and effects of the process parameters : Modélisation numérique du frittage de particules d'argent aux échelles nano- et micrométriques : étude des mécanismes physiques en jeu et effets des paramètres de process. [Doctoral Dissertation]. université Paris-Saclay; 2020. Available from: http://www.theses.fr/2020UPASV030

University of Toronto

5. Tranquada, George Christopher. Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces.

Degree: 2013, University of Toronto

URL: http://hdl.handle.net/1807/35697

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The current study is focused on the characterization of four natural leaf species (quaking, bigtooth and columnar european aspen as well as black locust) possessing… (more)

Subjects/Keywords: Superhydrophobic surfaces; environmental degradation; evolution of superhydrophobic leaves; dual-scale roughness; wear and erosion of leaf surfaces; aspen and black locust leaf surfaces; evolution of leaf surfaces; superhydrophobic leaf surfaces; cuticular damage; micro and nano-scale roughness; biomimetics; nanomaterials; epicuticular wax morphologies; sensitivity to environmental stresses; micro-structured materials; nano-structured materials; nano-scale platelets; materials science; nanotechnology; materials engineering; 0794

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APA (6^th Edition):

Tranquada, G. C. (2013). Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/35697

Chicago Manual of Style (16^th Edition):

Tranquada, George Christopher. “Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces.” 2013. Masters Thesis, University of Toronto. Accessed April 16, 2021. http://hdl.handle.net/1807/35697.

MLA Handbook (7^th Edition):

Tranquada, George Christopher. “Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces.” 2013. Web. 16 Apr 2021.

Vancouver:

Tranquada GC. Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/1807/35697.

Council of Science Editors:

Tranquada GC. Evolution and Environmental Degradation of Superhydrophobic Aspen and Black Locust Leaf Surfaces. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/35697

University of Central Florida

6. Kaufman, Joshua. Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability.

Degree: 2014, University of Central Florida

URL: https://stars.library.ucf.edu/etd/4803

► Spherical micro- and nano-particles have found widespread use in many various applications from paint to cosmetics to medicine. Due to the multiplicity of desired particle… (more)

Subjects/Keywords: Multi material; fibers; particles; micro scale; nano scale; functional; Electromagnetics and Photonics; Optics; Dissertations, Academic – Optics and Photonics; Optics and Photonics – Dissertations, Academic

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APA (6^th Edition):

Kaufman, J. (2014). Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/4803

Chicago Manual of Style (16^th Edition):

Kaufman, Joshua. “Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability.” 2014. Doctoral Dissertation, University of Central Florida. Accessed April 16, 2021. https://stars.library.ucf.edu/etd/4803.

MLA Handbook (7^th Edition):

Kaufman, Joshua. “Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability.” 2014. Web. 16 Apr 2021.

Vancouver:

Kaufman J. Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability. [Internet] [Doctoral dissertation]. University of Central Florida; 2014. [cited 2021 Apr 16]. Available from: https://stars.library.ucf.edu/etd/4803.

Council of Science Editors:

Kaufman J. Multifunctional, Multimaterial Particle Fabrication Via an In-Fiber Fluid Instability. [Doctoral Dissertation]. University of Central Florida; 2014. Available from: https://stars.library.ucf.edu/etd/4803

Kyoto University / 京都大学

7. Fang, Hui. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価.

Degree: 博士(工学), 2016, Kyoto University / 京都大学

URL: http://hdl.handle.net/2433/215220 ; http://dx.doi.org/10.14989/doctor.r13008

新制・論文博士

乙第13008号

論工博第4133号

Subjects/Keywords: Micro/nano scale; Vibration testing; Elastic properties; Fatigue damage; Size dependence

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fang, H. (2016). Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価. (Thesis). Kyoto University / 京都大学. Retrieved from http://hdl.handle.net/2433/215220 ; http://dx.doi.org/10.14989/doctor.r13008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fang, Hui. “Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価.” 2016. Thesis, Kyoto University / 京都大学. Accessed April 16, 2021. http://hdl.handle.net/2433/215220 ; http://dx.doi.org/10.14989/doctor.r13008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fang, Hui. “Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価.” 2016. Web. 16 Apr 2021.

Vancouver:

Fang H. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価. [Internet] [Thesis]. Kyoto University / 京都大学; 2016. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/2433/215220 ; http://dx.doi.org/10.14989/doctor.r13008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fang H. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration : 共振を用いたマイクロ/ナノスケール材料の機械的特性の評価. [Thesis]. Kyoto University / 京都大学; 2016. Available from: http://hdl.handle.net/2433/215220 ; http://dx.doi.org/10.14989/doctor.r13008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Kyoto University

8. Fang, Hui. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration .

Degree: 2016, Kyoto University

URL: http://hdl.handle.net/2433/215220

Subjects/Keywords: Micro/nano scale; Vibration testing; Elastic properties; Fatigue damage; Size dependence

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fang, H. (2016). Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration . (Thesis). Kyoto University. Retrieved from http://hdl.handle.net/2433/215220

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Fang, Hui. “Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration .” 2016. Thesis, Kyoto University. Accessed April 16, 2021. http://hdl.handle.net/2433/215220.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Fang, Hui. “Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration .” 2016. Web. 16 Apr 2021.

Vancouver:

Fang H. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration . [Internet] [Thesis]. Kyoto University; 2016. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/2433/215220.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Fang H. Evaluation on mechanical properties of micro/nano-meter scale materials by resonant vibration . [Thesis]. Kyoto University; 2016. Available from: http://hdl.handle.net/2433/215220

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Northeastern University

9. Karimi, Zahra. Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials.

Degree: MS, Department of Mechanical and Industrial Engineering, 2015, Northeastern University

URL: http://hdl.handle.net/2047/d20128337

► Contamination of surfaces by nanomaterials can happen due to accidental spillage and release or gradual accumulation during processing or handling. Considering the increasingly wide use… (more)

▼ Contamination of surfaces by nanomaterials can happen due to accidental spillage and release or gradual accumulation during processing or handling. Considering the increasingly wide use of nanomaterials in industry and research labs and also taking into account the diversity of physical and chemical properties of different nanomaterials (such as solubility, aggregation/agglomeration, and surface reactivity), there is a pressing need to define reliable nanomaterial-specific decontamination guidelines. In this project, we propose and investigate a potential method for surface decontamination of carbon-based nanomaterials using solvent cleaning and wipes. The results show that the surfactant-assisted removal efficiencies of multi-walled carbon nanotubes, single walled carbon nantubes and single walled carbon nano-horns from silicon wafers through wiping is greater than 95%, 90% and 78%, respectively. The need for further studies to understand the mechanisms of nanomaterial removal from surfaces and development of standard techniques for surface decontamination of nanomaterials is highlighted.; Another phase of experiments were performed to examine the efficiency of surfactants to remove multi-walled carbon nanotubes (MWCNTs) from silicon substrates with nano and microscaled features. In the first set of experiments, nanoscale features were induced on silicon wafers using SF₆ and O₂ plasma. Atomic force microscopy (AFM) was used to observe the surface topology and roughness. In the second set, well-defined microscale topological features were induced on silicon wafers using photo lithography and plasma etching. The etching time was varied to create semi-ellipsoidal pits with average diameter and height of ~ 7-9 μm, and ~ 1-3 μm, respectively. MWCNTs in the form of liquid solution were deposited on the surface of silicon wafers using the spin coating process. For the cleaning process, the contaminated surfaces were first sprayed with different types of surfactant or water. Then, the MWCNTs were wiped off using a simple wiping mechanism. The areal density of the MWCNTs was quantified prior to and after the removal using scanning electron microscopy (SEM) and post-image processing. For a surface featured with nanoscale asperities, the removal efficiency was measured to be in the range 83-99% based on substrate type and surface roughness. No evident relationship was observed between the etching time and the removal efficiency. For microscale features, increase of the etching time significantly decreases the removal efficiency.

Subjects/Keywords: carbon nano tubes (CNTs); decontamination; nano and micro scale features; removal efficiency; scanning electron microscope (SEM); surfactant; Engineering; Mechanical Engineering; Surface contamination; Measurement; Contamination (Technology); Measurement; Silicon; Surfaces; Carbon nanotubes; Nanostructured materials; Solvents; Surface active agents

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Karimi, Z. (2015). Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials. (Masters Thesis). Northeastern University. Retrieved from http://hdl.handle.net/2047/d20128337

Chicago Manual of Style (16^th Edition):

Karimi, Zahra. “Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials.” 2015. Masters Thesis, Northeastern University. Accessed April 16, 2021. http://hdl.handle.net/2047/d20128337.

MLA Handbook (7^th Edition):

Karimi, Zahra. “Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials.” 2015. Web. 16 Apr 2021.

Vancouver:

Karimi Z. Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials. [Internet] [Masters thesis]. Northeastern University; 2015. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/2047/d20128337.

Council of Science Editors:

Karimi Z. Decontamination of surfaces exposed to carbon-based nanotubes and nanomaterials. [Masters Thesis]. Northeastern University; 2015. Available from: http://hdl.handle.net/2047/d20128337

10. Ahmari, Saeed. Recycling and Reuse of Wastes as Construction Material through Geopolymerization .

Degree: 2012, University of Arizona

URL: http://hdl.handle.net/10150/223338

► Storage of mine tailings and waste concrete imposes economical and environmental impacts. Researchers have attempted to reuse wastes as construction material by utilizing ordinary Portland… (more)

▼ Storage of mine tailings and waste concrete imposes economical and environmental impacts. Researchers have attempted to reuse wastes as construction material by utilizing ordinary Portland cement (OPC) to stabilize them. This method, however, has a number of limitations related to OPC. In this research, a recent technology called geopolymerization is used to stabilize mine tailings and concrete waste so that they can be completely recycled and reused. The research includes three main parts. The first part studies the effect of different factors on the mechanical properties, micro/nano structure, and elemental and phase composition of mine tailings-based geopolymer binder. The second part investigates the feasibility of producing geopolymer bricks using mine tailings. The physical and mechanical properties, micro/nano structure, durability, and environmental performance of the produced bricks are studied in a systematic way. Moreover, the enhancement of the mine tailings-based geopolymer bricks by adding cement kiln dust (CKD) is studied. The third part of the research investigates the recycling of the fines fraction of crushed waste concrete to produce binder through geopolymerization in order to completely recycle concrete waste. The results indicate the viability of geopolymerization of mine tailings by optimizing the synthesis conditions. By properly selecting these factors, mine tailings-based geopolymer bricks can be produced to meet the ASTM standard requirements and to be environmentally safe by effectively immobilizing the heavy metals in the mine tailings. The physical and mechanical properties and durability of the mine tailings-based geopolymer bricks can be further enhanced by adding a small amount of CKD. The results also show that the fines fraction of crushed waste concrete can be used together with fly ash to produce high performance geopolymer binder. Incorporation of calcium in the geopolymer structure and coexistence of the calcium products such as CSH gel and the geopolymer gel explains the enhancement of the mine tailings-based geopolymer bricks with CKD and the high performance of geopolymer binder from the waste concrete fines and fly ash. The research contributes to sustainable development by promoting complete recycling and utilization of mine tailings and concrete waste as construction material. Advisors/Committee Members: Zhang, Lianyang (advisor), Zhang, Jinhong (committeemember), Budhu, Muniram (committeemember), Frantziskonis, George (committeemember), Zhang, Lianyang (committeemember).

Subjects/Keywords: mine tailings; waste concrete; micro/nano-scale properties; Civil Engineering; geopolymer; macro-scale behavior

…different factors.  Investigate the micro/nano-scale structure and elemental and phase… …Study Uniaxial Compression Tests Water Absorption/ Durability Tests Micro /Nano–Scale… …Kinetics of Dissolution/Geopolymerization Linking macro-scale behavior and micro/nano-scale… …Nano-scale Study The macro-scale behavior is closely related to the micro/nano-scale… …characteristics – micro/nano-scale structure and elemental and phase compositions. Therefore, systematic…

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APA (6^th Edition):

Ahmari, S. (2012). Recycling and Reuse of Wastes as Construction Material through Geopolymerization . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/223338

Chicago Manual of Style (16^th Edition):

Ahmari, Saeed. “Recycling and Reuse of Wastes as Construction Material through Geopolymerization .” 2012. Doctoral Dissertation, University of Arizona. Accessed April 16, 2021. http://hdl.handle.net/10150/223338.

MLA Handbook (7^th Edition):

Ahmari, Saeed. “Recycling and Reuse of Wastes as Construction Material through Geopolymerization .” 2012. Web. 16 Apr 2021.

Vancouver:

Ahmari S. Recycling and Reuse of Wastes as Construction Material through Geopolymerization . [Internet] [Doctoral dissertation]. University of Arizona; 2012. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/10150/223338.

Council of Science Editors:

Ahmari S. Recycling and Reuse of Wastes as Construction Material through Geopolymerization . [Doctoral Dissertation]. University of Arizona; 2012. Available from: http://hdl.handle.net/10150/223338

11. Jaber, Wassim. Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés.

Degree: Docteur es, Thermique, 2016, Lyon

URL: http://www.theses.fr/2016LYSEI109

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The context of this PhD is the reduction of sizes involved in material development and the confinement of heat in modern devices, which are known… (more)

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The context of this PhD is the reduction of sizes involved in material development and the confinement of heat in modern devices, which are known to lead to the apparition of hot spots. The goal is to investigate heat conduction from micro- to nanoscale wide Joule-heated wires standing on flat layered materials. A particular focus is given to the analysis of phonon heat dissipation when departing from the well-known Fourier diffusive conduction and entering the ballistic regime. The manuscript starts with a summary of the main observed effects on the effective thermal conductivity in nanoscale materials, especially in light of the values of thermallyaveraged phonon mean free paths and the associated Knudsen number. Then the advantages and drawbacks of various measurement techniques are discussed. The analysis of the experimental configuration requires 2D analytical and 3D finite-element method based numerical studies of diffusive heat conduction from a finite source into a medium. Limitations of the 3! method due to wire length, substrate geometry and thin oxide layers are highlighted. The electro-thermal setup developed and the procedure used to deposit the devices on top of the samples are then detailed. A set of well-known materials with mean free path ranging from few nanometers to hundreds of nanometers is characterized with microwires. The thermal conduction properties of multilayer materials are investigated. Heat dissipation from finite sources on top of silicon substrates is then measured as a function of temperature. The mean free path is known to become large when temperature decreases. As a result, this configuration provides clues for understanding heat conduction from ballistic sources. The observed behavior is very different from the one predicted by Fourier’s law and shows a strong reduction of the dissipation. It is found that the results are comparable to earlier measurements involving ridges. They are analyzed with various levels of approximations of predictions using the Boltzmann transport equation. The results obtained may be useful in many fields, in particular for electronics and thermoelectric designs.

Le contexte de ce doctorat est la réduction des tailles impliquées dans le développement des matériaux et le confinement de la chaleur dans les dispositifs modernes, qui sont connus pour conduire à l'apparition de points chauds. L'objectif est d'étudier la conduction de la chaleur à partir de fils chauffés par Joule à l'échelle nanométrique et à l'échelle nanométrique, reposant sur des matériaux à couches planes. Une attention particulière est accordée à l'analyse de la dissipation thermique des phonons en partant de la conduction de Fourier bien connue et en entrant dans le régime balistique. Le manuscrit commence par un résumé des principaux effets observés sur la conductivité thermique effective dans les matériaux à l'échelle nanométrique, en particulier à la lumière des valeurs des voies libres moyennes des phonons et du nombre de Knudsen associé. Ensuite, les avantages et les…

Advisors/Committee Members: Chapuis, Pierre-Olivier (thesis director), Vaillon, Rodolphe (thesis director).

Subjects/Keywords: Conduction thermique à l'échelle nanométrique; Conductivité thermique; Transfert de chaleur; Transfert de chaleur aux micro- et nano-Échelles; Echelle nanométrique; Echelle microscopique; Technique électrique quatre sondes; Conduction chaleur de phonon; Nanoscale heat conduction; Thermal conductivity; Heat transfert; Heat transfer at micro and nanoscales; Nanoscale scale; Microscopic scale; Electrical technology four sensors; Phonon heat conduction; 536.230 72

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APA (6^th Edition):

Jaber, W. (2016). Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés. (Doctoral Dissertation). Lyon. Retrieved from http://www.theses.fr/2016LYSEI109

Chicago Manual of Style (16^th Edition):

Jaber, Wassim. “Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés.” 2016. Doctoral Dissertation, Lyon. Accessed April 16, 2021. http://www.theses.fr/2016LYSEI109.

MLA Handbook (7^th Edition):

Jaber, Wassim. “Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés.” 2016. Web. 16 Apr 2021.

Vancouver:

Jaber W. Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés. [Internet] [Doctoral dissertation]. Lyon; 2016. [cited 2021 Apr 16]. Available from: http://www.theses.fr/2016LYSEI109.

Council of Science Editors:

Jaber W. Phonon heat conduction probed by means of an electro-thermal method involving deposited micro and nanowires : Conduction de la chaleur au phonon sondée au moyen d'une méthode électrothermique impliquant des micro et nanofils déposés. [Doctoral Dissertation]. Lyon; 2016. Available from: http://www.theses.fr/2016LYSEI109

12. Ponomareva, Svetlana. Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials.

Degree: Docteur es, Nanophysique, 2017, Grenoble Alpes; Université polytechnique de Tomsk (Russie)

URL: http://www.theses.fr/2017GREAY035

►

L'auteur n'a pas fourni de résumé en français

Nowadays in medicine and biotechnology a wide range of applications involves magnetic micro/nano-object manipulation including remote control… (more)

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L'auteur n'a pas fourni de résumé en français

Nowadays in medicine and biotechnology a wide range of applications involves magnetic micro/nano-object manipulation including remote control of magnetic beads, trapping of drug vectors, magnetic separation of labelled cells and so on. Handling and positioning magnetic particles and elements functionalized with these particles has greatly benefited from advances in microfabrication. Indeed reduction in size of the magnet while maintaining its field strength increases the field gradient. In this context, arrays made of permanent micromagnets are good candidates for magnetic handling devices. They are autonomous, suitable for integration into complex systems and their magnetic action is restricted to the region of interest.In this thesis we have elaborated an original approach based on AFM and MFM for quantitative study of the magnetic force and associated force gradients induced by TMP micromagnet array on an individual magnetic micro/nano-object. For this purpose, we have fabricated smart MFM probes where a single magnetic (sub)micronic sphere was fixed at the tip apex of a non-magnetic probe thanks to a dual beam FIB/SEM machine equipped with a micromanipulator.Scanning Force Microscopy conducted with such probes, the so-called Magnetic Particle Scanning Force Microscopy (MPSFM) was employed for 3D mapping of TMP micromagnets. This procedure involves two main aspects: (i) the quantification of magnetic interaction between micromagnet array and attached microsphere according to the distance between them and (ii) the complementary information about micromagnet array structure. The main advantage of MPSFM is the use of a probe with known magnetization and magnetic volume that in combination with modelling allows interpreting the results ably.We conducted MPSFM on TMP sample with two types of microparticle probes: with superparamagnetic and NdFeB microspheres. The measurements carried out with superparamagnetic microsphere probes reveal attractive forces (up to few tens of nN) while MFM maps obtained with NdFeB microsphere probes reveal attractive and repulsive forces (up to one hundred of nN) for which the nature of interaction is defined by superposition of microsphere and micromagnet array magnetizations. The derived force and its gradient from MFM measurements are in agreement with experiments on microparticle trapping confirming that the strongest magnetic interaction is observed above the TMP sample interfaces, between the areas with opposite magnetization. Thanks to 3D MFM maps, we demonstrated that intensity of magnetic signal decays fast with the distance and depends on micromagnet array and microsphere properties.Besides the magnetic interaction quantification, we obtained new information relevant to TMP sample structure: we observed and quantified the local magnetic roughness and associated fluctuations, in particular in zones of reversed magnetization. The variation of detected signal can reach the same order of magnitude as the signal above the micromagnet…

Advisors/Committee Members: Marchi, Florence (thesis director), Khasanov, Oleg (thesis director).

Subjects/Keywords: Réseau de micro-aimants permanents; Microscopie à force atomique et à force magnétique; Fabrication de la sonde à microparticule; Quantification et cartographie d'interaction à nano-Échelle; Modélisation micromagnétique; Micromagnétisme; Permanent micromagnet array; Atomic and Magnetic Force Microscopy; Microparticle probe fabrication; Nano-Scale interaction quantification and mapping; Micromagnetic modelling; Micromagnetism; 530

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APA (6^th Edition):

Ponomareva, S. (2017). Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials. (Doctoral Dissertation). Grenoble Alpes; Université polytechnique de Tomsk (Russie). Retrieved from http://www.theses.fr/2017GREAY035

Chicago Manual of Style (16^th Edition):

Ponomareva, Svetlana. “Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials.” 2017. Doctoral Dissertation, Grenoble Alpes; Université polytechnique de Tomsk (Russie). Accessed April 16, 2021. http://www.theses.fr/2017GREAY035.

MLA Handbook (7^th Edition):

Ponomareva, Svetlana. “Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials.” 2017. Web. 16 Apr 2021.

Vancouver:

Ponomareva S. Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials. [Internet] [Doctoral dissertation]. Grenoble Alpes; Université polytechnique de Tomsk (Russie); 2017. [cited 2021 Apr 16]. Available from: http://www.theses.fr/2017GREAY035.

Council of Science Editors:

Ponomareva S. Développement et caractérisation avancée de matériaux magnétiques durs de haute performance : Development and advanced characterization of high performance hard magnetic materials. [Doctoral Dissertation]. Grenoble Alpes; Université polytechnique de Tomsk (Russie); 2017. Available from: http://www.theses.fr/2017GREAY035

13. Ayche, Kenza. Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity.

Degree: Docteur es, Physique, 2017, Le Mans

URL: http://www.theses.fr/2017LEMA1005

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L’engouement mondial pour les appareils nomades et la course à la sobriété énergétique font de la diminution de la taille des systèmes microélectroniques (MEMS) un… (more)

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L’engouement mondial pour les appareils nomades et la course à la sobriété énergétique font de la diminution de la taille des systèmes microélectroniques (MEMS) un enjeu majeur pour les prochaines années. Les micro batteries au lithium sont aujourd'hui le moyen le plus efficace pour stocker et alimenter des dispositifs avec une très forte densité énergétique. Les incorporer dans des cartes de crédit comportant un écran et des touches intégrés est l’un des défis que relèvent les multinationales comme ST Micro Electronics. Ces micro batteries contiennent cependant du lithium métallique qui peut s'avérer très dangereux quand il est en contact avec de l’eau ou de l’air humide. Ainsi, afin de protéger les composants à une exposition à l’humidité, une encapsulation de l’ensemble de la batterie est nécessaire. L'encapsulation polymère a l’avantage, comparativement à d’autres matériaux, de présenter un faible coût de mise en forme et un faible poids. Cependant, de tels systèmes d'encapsulation sont aujourd'hui insuffisants pour garantir une durée de vie de plusieurs années des composants car en présence d’humidité ou d’une variation de température importante la tenue mécanique des assemblages peut être fragilisée. L'objectif de la thèse est donc de réaliser et d'étudier le comportement mécanique et structural d’assemblage de couches minces de polymères et de métaux en température et en humidité. Deux types de polymères ont été choisis pour ce projet :1. Le chlorure de polyvinylidène (PVDC), un polymère commercial très utilisé pour ses bonnes propriétés barrières à l'eau 2. Un oligomère acrylate reticulable par voie thermique et UV synthétisé au sein de l'IMMM.

The increasing number of mobile devices and the race to energy sobriety make the decrease of the size of microelectronic systems (MEMS) a major challenge. Today, Lithium micro batteries are currently the best solution for high-power-and-energy applications. Incorporate them into credit cards containing a screen or associate them to electronic sensors for the supervision is the challenge which raises international companies such as ST Microelectronics. However, these micro batteries contain some lithium metal which can be dangerous if the metallic lithium is in contact with water or humid air. In addition, the substance can spontaneously ignite in the contact of the humidity. So, in order to avoid the problems of safety, we absolutely have to protect the lithium contained in our micro batteries using an encapsulation layer. Polymeric encapsulation has the advantage, compared with other materials (ceramic, metal), to present a moderate cost of shaping and a low weight. However, such systems of encapsulation are today insufficient to guarantee a satisfactory life cycle of components. Indeed, in the presence of humidity or of a too important temperature variation, the mechanical assemblies can be weakened and engender an irreparable break. The objective of the thesis is therefore to realize and study the mechanical and structural behavior of assembly of thin layers of…

Advisors/Committee Members: Delorme, Nicolas (thesis director), Bardeau, Jean-Francois (thesis director), Pilard, Jean-François (thesis director), Ruello, Pascal (thesis director).

Subjects/Keywords: Polyisoprène acrylate; Encapsulation; Films minces; Réticulation thermique et UV; Spectroscopies Raman et infrarouge; Microscopie à force atomique; Opto-acoustique ultra-rapide; Nano-indentation; Acrylate polyisoprene; Thin films; Thermal and UV crosslinking; Raman and infrared spectroscopies; Atomic force spectroscopy; Ultrafast acoustics; Quartz micro-scale; 620.192 028 7

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ayche, K. (2017). Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity. (Doctoral Dissertation). Le Mans. Retrieved from http://www.theses.fr/2017LEMA1005

Chicago Manual of Style (16^th Edition):

Ayche, Kenza. “Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity.” 2017. Doctoral Dissertation, Le Mans. Accessed April 16, 2021. http://www.theses.fr/2017LEMA1005.

MLA Handbook (7^th Edition):

Ayche, Kenza. “Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity.” 2017. Web. 16 Apr 2021.

Vancouver:

Ayche K. Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity. [Internet] [Doctoral dissertation]. Le Mans; 2017. [cited 2021 Apr 16]. Available from: http://www.theses.fr/2017LEMA1005.

Council of Science Editors:

Ayche K. Propriétés mécaniques et structurales d'encapsulants polymères utilisés en microélectronique : effet de la température et de l'humidité : Mechanical and structural properties of polymer encapsulants used in microelectronics : effect of temperature and humidity. [Doctoral Dissertation]. Le Mans; 2017. Available from: http://www.theses.fr/2017LEMA1005

Georgia Tech

14. Ng, Chee Keong. Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel.

Degree: MS, Mechanical Engineering, 2005, Georgia Tech

URL: http://hdl.handle.net/1853/6862

► The marked increase in demand for miniaturized consumer products in a broad range of potential applications including medical, telecommunication, avionics, biotechnology and electronics is a… (more)

Subjects/Keywords: Micro-/ nano-scale cutting; Aluminum 7075; P20; Steel; Nanotechnology; Microtechnology; Micromachining; Cutting; Aluminum alloys

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APA (6^th Edition):

Ng, C. K. (2005). Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/6862

Chicago Manual of Style (16^th Edition):

Ng, Chee Keong. “Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel.” 2005. Masters Thesis, Georgia Tech. Accessed April 16, 2021. http://hdl.handle.net/1853/6862.

MLA Handbook (7^th Edition):

Ng, Chee Keong. “Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel.” 2005. Web. 16 Apr 2021.

Vancouver:

Ng CK. Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel. [Internet] [Masters thesis]. Georgia Tech; 2005. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/1853/6862.

Council of Science Editors:

Ng CK. Experimental Study of Micro-/ Nano-Scale Cutting of Aluminum 7075 and P20 Mold Steel. [Masters Thesis]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/6862

15. Metaxa, Zoi. Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο.

Degree: 2012, Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ)

URL: http://hdl.handle.net/10442/hedi/27665

► Typical reinforcement of concrete is provided using reinforcing bars and macrofibers both of which reinforce concrete on the millimeter scale. Recently the use of microfiber… (more)

▼ Typical reinforcement of concrete is provided using reinforcing bars and macrofibers both of which reinforce concrete on the millimeter scale. Recently the use of microfiber reinforcement has led to significant improvement of the mechanical properties of cement based materials. However while microfibers delay the development of formed microcracks they do not stop their initiation. Crack formation in cement based materials initiates from the nanoscale where traditional reinforcement is not effective. Cracking at the nanoscale has a high impact on the durability of the matrix, for example it can favor corrosion alkali silica reaction chloride penetration and freeze thaw. This research was highly motivated by the idea of “tailoring” the concrete properties at the nanoscale so as to develop a new generation of a “crack-free material”. It is envisioned that problems which cannot be solved with existing technology can be addressed with the use of nanoscale materials and manipulation of the matrix nanostructure. The overall objective of the research is to develop new high performance cementitious nanocomposites with substantially increased mechanical properties and durability. To achieve this, the cementitious materials were reinforced at the nanoscale where cracks initiate by incorporating carbon nanotubes (CNTs) and carbon nanofibers (CNFs) as well as at the microscale by incorporating polyvinyl alcohol (PVA) microfibers. The remarkable mechanical properties of both CNTs and CNFs suggest that they are ideal candidates for the development of high performance cementitious composites. The major challenge however, associated with the incorporation of CNTs and CNFs in cement based materials is then poor dispersion. To achieve their effective dispersion a simple one step method utilizing a surfactant and ultrasonic processing was employed. This method was optimized using two critical parameters among others the effect of ultrasonic energy and the effect of surfactant to nanoscale fibers ratio. An ultrasonic energy of 2800 kJ/I and a surfactant to nanoscale fibers weight ratio close to 4.0 was found to be optimal for effective dispersion. Following the above optimal values cement based nanocomposites of conventional and high performance cementitious matrices were produced. Fracture mechanics tests were performed to investigate the effect of MWCNTs and CNFs type in conjunction with the effect of the concentration of MWCNTs and CNFs on the fracture characteristics of the nanocomposites. Scanning electron microscopy (SEM) was employed to study the morphology and the microstructure of the cementitious nanocomposites. Additionally a determination of the nanomechanical properties and the porosity of the composites was carried out through nanoindentation experiments. It was found that small amounts of effectively dispersed MWCNTs and CNFs (0.01-0.1 wt.% of cement) can significantly increase the strength and the stiffness of the cementitious matrix. In particular, lower amounts of long MWCNTs and CNFs (0.025-0.048 wt.%) provide…

Subjects/Keywords: Νανοσύνθετα υλικά με βάση το τσιμέντο; Νανοσωλήνες άνθρακα; Μηχανικές ιδιότητες σε νάνο και μάκρο κλίμακα; Αυτογενής συρρίκνωση; Υβριδικός οπλισμός σε νάνο και μίκρο κλίμακα; Ηλεκτρονική μακροσκοπία σάρωσης; Αιώρημα νανοσωλήνων άνθρακα υψηλής συγκέντρωσης; Προσομοίωση μηχανικής συμπεριφοράς νανοσύνθετων υλικών; Displacement based nanocomposites; Carbon nanotubes and carbon nanofiders; Nano and macroscale mechanical properties; Autogenous shrinkage; Hybrid reinforcement at the nano and micro scale; Scanning electron microscopy; Highly concentrated carbon nanotube admixture; Prediction of the Young's modulus of the nanocomposites

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APA (6^th Edition):

Metaxa, Z. (2012). Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο. (Thesis). Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/27665

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Metaxa, Zoi. “Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο.” 2012. Thesis, Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ). Accessed April 16, 2021. http://hdl.handle.net/10442/hedi/27665.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Metaxa, Zoi. “Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο.” 2012. Web. 16 Apr 2021.

Vancouver:

Metaxa Z. Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο. [Internet] [Thesis]. Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ); 2012. [cited 2021 Apr 16]. Available from: http://hdl.handle.net/10442/hedi/27665.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Metaxa Z. Μηχανική συμπεριφορά και ανθεκτικότητα νέων προηγμένων νανοσύνθετων υλικών με βάση το τσιμέντο. [Thesis]. Democritus University of Thrace (DUTH); Δημοκρίτειο Πανεπιστήμιο Θράκης (ΔΠΘ); 2012. Available from: http://hdl.handle.net/10442/hedi/27665

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Windsor

16. Han, Lihong. Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys.

Degree: PhD, Mechanical, Automotive, and Materials Engineering, 2007, University of Windsor

URL: https://scholar.uwindsor.ca/etd/7221

Subjects/Keywords: AL; ALLOYS; ALUMINUM; BEHAVIOUR; CA; CALCIUM; CHARACTERIZATION; MAGNESIUM; MAGNESIUM-ALUMINUM-CALCIUM ALLOYS; MECHANICAL; MG; MICRO; MICROSTRUCTURE; Magnesium-aluminum-calcium alloys; Microstructure; NANO; NANOSCALE; SCALE

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Han, L. (2007). Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys. (Doctoral Dissertation). University of Windsor. Retrieved from https://scholar.uwindsor.ca/etd/7221

Chicago Manual of Style (16^th Edition):

Han, Lihong. “Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys.” 2007. Doctoral Dissertation, University of Windsor. Accessed April 16, 2021. https://scholar.uwindsor.ca/etd/7221.

MLA Handbook (7^th Edition):

Han, Lihong. “Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys.” 2007. Web. 16 Apr 2021.

Vancouver:

Han L. Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys. [Internet] [Doctoral dissertation]. University of Windsor; 2007. [cited 2021 Apr 16]. Available from: https://scholar.uwindsor.ca/etd/7221.

Council of Science Editors:

Han L. Microstructure characterization and micro- and nanoscale mechanical behaviour of magnesium-aluminum and magnesium-aluminum-calcium alloys. [Doctoral Dissertation]. University of Windsor; 2007. Available from: https://scholar.uwindsor.ca/etd/7221

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