Open Access Theses and Dissertations

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You searched for subject:(Nano particle silver). Showing records 1 – 2 of 2 total matches.

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1. 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 

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

APA (6th 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 (16th 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 (7th 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

2. Nahid, Masrur Morshed. In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks.

Degree: Physics, 2012, Umeå University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62827 

This thesis presents a comparative study between two silver nanoparticle inks that were deposited using a Drop-on-Demand (DoD) inkjet printer, aiming at finding a functional ink that can be used to print electrodes in Light-emitting Electrochemical Cells (LECs). To achieve this, a DoD inkjet printer was installed and an acquaintance with the printer was attained. Among the two inks, one was employed as received while the other was reformulated, and successful deposition of both the inks was observed. During the reformulation process, it was seen that the highly volatile tetrahydrofuran (THF) solvent can be used to improve the ink properties, in contrast to what is recommended. After that, the inks were deposited on UV-ozone treated glass substrates, sintered at an elevated temperature under ambient conditions, and their specific resistances and thicknesses were measured. Finally, the inks were used to print the anode in a structured sandwich-cell LEC. The performance comparison was conducted by observing the emitted light of the LECs. The results indicate that the reformulated ink performs better, probably due to the lower silver concentration that results in flatter surface, which in turn effectively alleviates shorts.

Subjects/Keywords: LEC; light-emitting electrochemical cells; conductive nano-particle inks; silver inks; inkjet printer; organic electronics

…solutions and particle suspensions can work. For good performance, the fluids should have a… …Figure 12: Single line of Ag nano particles (printed with Ink#1) deposited on the… …Plastic Price (per gram) Dispersion Matrix Ag content (wt %) Particle-size… …heat is applied, the solvent 19 evaporates and the particle-ligand bonds are broken. This… …Ink#2 is different. Ink#2 is a transparent, ‘non-particle-type’ ink and the organic… 

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

APA (6th Edition):

Nahid, M. M. (2012). In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62827

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

Chicago Manual of Style (16th Edition):

Nahid, Masrur Morshed. “In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks.” 2012. Thesis, Umeå University. Accessed April 16, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62827.

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

MLA Handbook (7th Edition):

Nahid, Masrur Morshed. “In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks.” 2012. Web. 16 Apr 2021.

Vancouver:

Nahid MM. In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks. [Internet] [Thesis]. Umeå University; 2012. [cited 2021 Apr 16]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62827.

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

Council of Science Editors:

Nahid MM. In Quest of Printed Electrodes for Light-emitting Electrochemical Cells: A Comparative Study between Two Silver Inks. [Thesis]. Umeå University; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62827

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

.