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You searched for subject:(nanoporous composite). Showing records 1 – 3 of 3 total matches.

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Cornell University

1. Tu, Zhengyuan. Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications.

Degree: M.S., Materials Science and Engineering, Materials Science and Engineering, 2014, Cornell University

Subjects/Keywords: lithium metal batteries; nanoporous composite; dendrite

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

APA (6th Edition):

Tu, Z. (2014). Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/37153

Chicago Manual of Style (16th Edition):

Tu, Zhengyuan. “Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications.” 2014. Masters Thesis, Cornell University. Accessed October 21, 2020. http://hdl.handle.net/1813/37153.

MLA Handbook (7th Edition):

Tu, Zhengyuan. “Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications.” 2014. Web. 21 Oct 2020.

Vancouver:

Tu Z. Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications. [Internet] [Masters thesis]. Cornell University; 2014. [cited 2020 Oct 21]. Available from: http://hdl.handle.net/1813/37153.

Council of Science Editors:

Tu Z. Nanoporous Polymer/Ceramic Separator Electrolyte For Lithium Metal Battery Applications. [Masters Thesis]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/37153


Indian Institute of Science

2. Yadav, Arti. Nano Porous Alumina Based Composite Coating for Tribological Applications.

Degree: PhD, Faculty of Engineering, 2018, Indian Institute of Science

Anodisation is a surface treatment process, commonly used to form a protective oxide coating on the surface of metals like aluminium. Anodised coatings, being grown out of the base metal have excellent interface strength but are porous and brittle. Porosity of the coating reduces the hardness and the brittle nature of the oxide induces cracking. In practice, the pores are typically filled with organic dye and sealed. Under certain controlled electrochemical conditions, anodisation results in a highly ordered hexagonal porous structure in pure aluminium. In this work, we explore the possibility of using this ordered porous alumina to form a novel metal nanocomposite as a tribological coating. By optimizing the nonporous structure and tuning the electrodeposition process, we uniformly filled the ordered pores with copper. We have measured the hardness of the resulting ordered and aligned nanocomposite. We explore the possibility of using this composite coating for tribological applications by carrying out some preliminary reciprocating wear test. Ordered porous alumina layer is formed by a two-step anodisation process. By optimizing the anodisation conditions, we control the thickness of the coating and the pore size. The interface of the porous structure and aluminium substrate is defined by a non-conducting dense barrier oxide layer. However, to deposit metal into the pores, a conducting path should be established through the barrier layer. One possibility is to etch out the bottom of the pores at the cost of the interface strength and losing out on the main advantage of anodised coatings. To be able to fill metal without this sacrifice, we utilised the dendritic structure in the barrier layer formed by a step-wise reduction of voltage towards the end of anodisation process. Optimisation of this dendritic structure led to uniform deposition of metal into pores, achieved by pulsed electrodeposition. In pulse lectrodeposition, a positive pulse is applied to remove accumulated charge near to the bottom of pores, followed by a negative pulse to deposit metal and a delay to allow diffusion of ions. By optimising the pulse shape and duration, we have achieved uniform growth of metal into pores. Further, monitoring the deposition current helped us to identify and control different phases of growth of the nanowire. The properties of the porous alumina and the nanocomposite were measured by nanoindentation. The deformation characteristics were obtained by observing the indents in a FE-SEM. We find that dendritic modification of interface has very little effect on the hardness of the porous alumina layer. We also found that the porous alumina deformed either by compaction or by forming circumferential and radial cracks. When copper is filled in the nano pores, the hardness increased by 50% and no circumferential cracks were found up to the load of 10 mN for a film thickness of about 1 ┬Ám. Coefficient of friction of the coating reciprocated against steel in dry condition is found to be around 0.4. Minimal wear was observed… Advisors/Committee Members: Bobji, M S (advisor).

Subjects/Keywords: Porous Alumina; Tribological Coating; Composite CoatingS; Nanocomposites; Nanocomposite Coatings; Aluimina Anodisation; Metal Electrochemical Deposition; Nanoindentation; Porous Alumina Film Desposition; Nanoporous Alumina; Ordered Porous Alumina; Mechanical Engineering

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

APA (6th Edition):

Yadav, A. (2018). Nano Porous Alumina Based Composite Coating for Tribological Applications. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/3055

Chicago Manual of Style (16th Edition):

Yadav, Arti. “Nano Porous Alumina Based Composite Coating for Tribological Applications.” 2018. Doctoral Dissertation, Indian Institute of Science. Accessed October 21, 2020. http://etd.iisc.ac.in/handle/2005/3055.

MLA Handbook (7th Edition):

Yadav, Arti. “Nano Porous Alumina Based Composite Coating for Tribological Applications.” 2018. Web. 21 Oct 2020.

Vancouver:

Yadav A. Nano Porous Alumina Based Composite Coating for Tribological Applications. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2018. [cited 2020 Oct 21]. Available from: http://etd.iisc.ac.in/handle/2005/3055.

Council of Science Editors:

Yadav A. Nano Porous Alumina Based Composite Coating for Tribological Applications. [Doctoral Dissertation]. Indian Institute of Science; 2018. Available from: http://etd.iisc.ac.in/handle/2005/3055


Indian Institute of Science

3. Das, Mahua. Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation.

Degree: PhD, Faculty of Science, 2009, Indian Institute of Science

Thin film nanostructures may be defined as assemblies, arrays, or randomly distributed nanoparticles, nanowires, or nanotubes, which together form a layer of materials supported on a substrate surface. Because such nanostructures are supported on a substrate surface, their potential applications cover a wide area in optical, magnetic, electrochemical, electromagnetic, and optoelectronic devices. The focus of the present thesis is the development of methodologies to grow certain thin film nanostructures of some transition metal oxides (TMOs), including copper oxides and LixCoO2, through CVD, sol-gel, and electromagnetic radiation-mediated approaches. The work towards this objective can be divided into three parts: first, the design, synthesis, and systematic identification of novel metalorganic precursors of copper (monometallic) and Li and Co (bimetallic); second, the growth of nanostructured oxides thin films using these precursors; and third, the application of electromagnetic radiation to control or tailor the growth of as grown nanostructures. The underlying growth mechanisms substantiated by appropriate evidence have been put forward, wherever found relevant and intriguing. It may be added that the principal objective of the work reported here has been to explore the several ideas noted above and examine possibilities, rather than to study any specific one of them in significant detail. It is hoped earnestly that this has been accomplished to a reasonable extent. Chapter 1 reviews briefly the reports available in the literature on three specific methods of growing thin films nanostructures, namely chemical vapour deposition, sol-gel processing and light-induced approach. The objective of this chapter has been to provide the background of the work done in the thesis, and is substantiated with a number of illustrative examples. Some of the fundamental concepts involved, viz., plasmons and excitons, have been defined with illustration wherever found relevant in the context of the work. Chapter 2 describes the various techniques used for synthesis and characterisation of the metalorganic complexes as well as of the thin films. This chapters covers mostly experimental details, with brief descriptions of the working principles of the analytical procedures adopted, namely, infrared spectroscopy, mass spectroscopy, elemental analysis, and thermal analysis for characterisation of the metalorganic complexes. This is followed by a similarly brief account of techniques employed to characterize the thin films prepared in this work, viz., glancing incidence X-ray diffraction (GIXRD), field-emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), electrostatic force microscopy (EFM), transmission electron microscopy (TEM), glancing incidence infra-red spectroscopy (GIIR) and, UV-visible spectroscopy. The metalorganic chemical vapour deposition (MOCVD) systems built in house and used for growth of films are described in detail. The topics in the different sections of the chapter are accompanied by… Advisors/Committee Members: Shivasankar, S A (advisor).

Subjects/Keywords: Thin Films - Synthesis; Chemical Vapour Deposition (CVD); Solgel Method; Electromagnetic Irradiation; Thin Film Nanostructures; Nanostructured Oxides Thin Films; Metalorganic Complexes - Synthesis; Novel Polynuclear Complexes; Copper Oxide-Carbon Nanocomposites; Nanoporous Composite Films; Nanocrystalline LixCoO2 Films; Nanocrystals; Carbonaceous Nanostructure; Materials Science

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

APA (6th Edition):

Das, M. (2009). Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/619

Chicago Manual of Style (16th Edition):

Das, Mahua. “Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation.” 2009. Doctoral Dissertation, Indian Institute of Science. Accessed October 21, 2020. http://etd.iisc.ac.in/handle/2005/619.

MLA Handbook (7th Edition):

Das, Mahua. “Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation.” 2009. Web. 21 Oct 2020.

Vancouver:

Das M. Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2009. [cited 2020 Oct 21]. Available from: http://etd.iisc.ac.in/handle/2005/619.

Council of Science Editors:

Das M. Thin Films Of A Carbonaceous Copper Oxide, Li Doped Cobalt Oxide And Li At Nanometric Dimension : Synthesis Through CVD, Solgel And Electromagnetic Irradiation And Characterisation. [Doctoral Dissertation]. Indian Institute of Science; 2009. Available from: http://etd.iisc.ac.in/handle/2005/619

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