Novel Nanostructured Thin Film Heterostructures: Growth, Nanoscale Characterization and Properties

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dc.contributor.advisor Nadia Elmasry, Committee Member en_US
dc.contributor.advisor Jagdish Narayan, Committee Chair en_US
dc.contributor.advisor Ronald Scattergood, Committee Member en_US
dc.contributor.advisor John Muth, Committee Member en_US Chugh, Amit en_US 2010-04-02T18:49:50Z 2010-04-02T18:49:50Z 2006-08-08 en_US
dc.identifier.other etd-08012005-174218 en_US
dc.description.abstract During my graduate study, I have been involved in the growth of new nano heterostructures grown by Pulsed Laser Deposition and by Laser MBE with the emphasis on understanding the thin film growth process by a new paradigm of Domain Matching Epitaxy (DME) and to integrate them on substrates like silicon, sapphire and new metallic substrates like Ni RaBiTS with exciting technological applications. The DME involves matching of integral multiples of lattice planes (diffracting as well as nondiffracting) between the film and the substrate, and this matching could be different in different directions. The idea of matching planes is derived from the basic fact that during thin film growth lattice relaxation involves generation of dislocations whose Burgers vectors correspond to missing or extra planes, rather than lattice constants. In the DME framework, the conventional lattice matching epitaxy (LME) becomes a special case where matching of lattice constants results from matching of lattice planes with a relatively small misfit of less than 7-8%. In large lattice mismatch systems, epitaxial growth of thin films is possible by matching of domains where integral multiples of lattice planes match across the interface. The work done in my doctoral study is divided into two main segments, a) Growth of layered nanostructures and b) growth of nanostructured composite thin films. The three systems studied under the first segment are 1) Growth of epitaxial self-aligned insulating films on metals (Cu) and its integration with Si (100). 2) Growth and integration of LSMO with Si (100). 3) Growth of Si on Ni substrates (highly textured) with TiN as a buffer layer. The heterostructures studied under the second part are 1) Role of Self-assembled Gold Nanodots in Improving the Electrical and Optical Characteristics of Zinc Oxide Films and 2) Growth of high quality epitaxial ZnO-Pt Nanocomposite and ZnO/Pt, Nanolayer Structures on Sapphire (0001). The epitaxial growth of these heterostructures was carried out by Pulsed laser deposition and laser MBE. The epitaxial relationships are given in each case are shown to be due to domain matching epitaxy. X-Ray diffraction and Transmission Electron Microscopy studies confirm the relationship between film and substrate. Also, electrical and optical measurements were done, in order to study the change in these properties. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject copper interconnects en_US
dc.subject optical properties en_US
dc.subject zinc oxide en_US
dc.subject electrical properties en_US
dc.subject Pulsed Laser Deposition en_US
dc.subject Domain Matching Epitaxy en_US
dc.subject Transmission Electron Microscopy en_US
dc.title Novel Nanostructured Thin Film Heterostructures: Growth, Nanoscale Characterization and Properties en_US PhD en_US dissertation en_US Materials Science and Engineering en_US

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