Thesis (Ph. D.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains xiii, 150 p. : ill. Includes abstract. Includes bibliographical references (p. 141-150).

Thesis (Ph.D.)--Biomedical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: William D Hunt; Committee Member: Bruno Frazier; Committee Member: Dale Edmondson; Committee Member: Marie Csete; Committee Member: Peter Edmonson; Committee Member: Ruth O'Regan

Thesis (Ph. D.)--Rutgers University, 2008. / "Graduate Program in Electrical and Computer Engineering." Includes bibliographical references (p. 150-157).

Thesis (Ph. D.)--Rutgers University, 2008. / "Graduate Program in Electrical and Computer Engineering." Includes bibliographical references (p. 142-149).

Thesis (M.Sc.)--Memorial University of Newfoundland, 2006. / Bibliography: leaves 83-91. Also available online.

Thesis (Ph. D.)--Oregon State University, 2009. / Printout. Includes bibliographical references (leaves 165-173). Also available on the World Wide Web.

Thesis (M.S. in materials science and engineering)--Washington State University, December 2005. / Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 67-72). Also available on the World Wide Web.

Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010. / Thesis presented in partial fulfilment of the requirements for the degree Master of Science in Engineering at the University of Stellenbosch / ENGLISH ABSTRACT: Measurement of pressure with zinc oxide (ZnO) nanowires was investigated. ZnO exhibits the piezoelectric effect, generating a voltage when pressure is applied to the material. This relationship between pressure and output voltage was used to make a pressure sensor. A study of the physical and mathematical working of the piezoelectric effect in ZnO nanowires was done. Simulations were conducted by means of specialised software to test the theory. The simulations gave results as the theory had predicted. ZnO nanowires were grown using various methods. Vapour liquid solid (VLS) was found to be the best method to grow uniform and dense arrays of ZnO nanowires. Statistical methods were employed to obtain the optimal parameters for the growth of ZnO nanowires through the VLS method. After the growth of the ZnO nanowires a pressure sensor was built. The manufacturing of the pressure sensor consisted of different steps. The sensors were tested to verify that they worked as described in theory and as shown in the simulations. The output voltage was lower than the simulated value due to imperfections and losses throughout the system. The output voltage versus applied pressure graphs did coincide with the bulk ZnO materials as well as related products, such as force sensing resistors. The output voltage is too low, but there are various methods by which the output voltage can be increased. These methods are discussed. The finished sensor can be used to continuously monitor pressure on a plane. / AFRIKAANSE OPSOMMING: Die meting van druk deur sink oksied (ZnO) nanodrade was ondersoek. ZnO toon die piëzo-elektriese effek - spanning word gegenereer wanneer druk op die materiaal aangewend word. Hierdie verhouding tussen druk en uitsetspanning is gebruik om ’n druksensor te vervaardig. ’n Studie van die fisiese en wiskundige werking van die piëzo-elektriese effek in ZnO nanodrade is gedoen. Simulasies deur middel van gespesialiseerde sagteware is uitgevoer om die teorie te bevestig. Die simulasies het resultate getoon soos deur die teorie beskryf word. ZnO nanodrade is gegroei deur verskillende metodes. Verdamping vloeistof vastestof (VVV) is as die beste metode gevind om uniforme en digte skikkings van ZnO nanodrade te kry. Statistiese metodes is aangewend om die optimale parameters vir die groei van ZnO nanodrade deur middel van die VVV metode te kry. Na afloop van die groei van die ZnO nanodrade is ’n druksensor vervaardig. Die vervaardigingsproses het uit verskillende stappe bestaan, ten einde die bou van ’n werkende druksensor uit die ZnO nanodrade te realiseer. Die sensors is getoets om te bevestig dat dit werk, soos beskryf deur die teorie en gewys in die simulasies. Die uitsetspanning was laer as wat verwag was as gevolg van onvolmaakthede en verliese in die hele stelsel. Die uitsetspanning teenoor druk grafieke van die sensor het ooreengestem met die van die grootmaat materiale, asook verwante produkte soos druk sensitiewe weerstande. Die uitset spanning is baie laag en daar bestaan verskillende maniere waarop die uitsetspanning verhoog kan word. Hierdie metodes word bespreek.

Submitted by MONICA IRMA APARECIDA VALDECI DE SOUZA null (cristina_monicas@hotmail.com) on 2016-05-16T23:39:27Z No. of bitstreams: 1 tese correção biblio 5.pdf: 1814748 bytes, checksum: 1bfe9a56010305cbe2ef946d8d005ec9 (MD5) / Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-05-17T20:04:08Z (GMT) No. of bitstreams: 1 souza_miav_me_arafo.pdf: 1814748 bytes, checksum: 1bfe9a56010305cbe2ef946d8d005ec9 (MD5) / Made available in DSpace on 2016-05-17T20:04:08Z (GMT). No. of bitstreams: 1 souza_miav_me_arafo.pdf: 1814748 bytes, checksum: 1bfe9a56010305cbe2ef946d8d005ec9 (MD5) Previous issue date: 2016-03-29 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste estudo foi avaliar a influência da incorporação de nanopartículas de óxido de zinco (NPZnO) nas concentrações de 3, 5 e 7%, sobre propriedades mecânicas e físicas do cimento de ionômero de vidro (CIV) Ketac Molar Easymix. A mistura das NPZnO ao CIV foi realizada pelo método manual e pela calcinação. As propriedades avaliadas foram: análise microestrutural, microdureza Vickers, resistência à compressão, à tração diametral e à flexão. A análise microesturural foi realizada por meio de MEV – FEG, a microdureza com auxilio de um microdurômetro digital (Micromet 2100) e os demais testes em máquina de ensaios mecânicos EMIC. Os dados foram avaliados pelo teste de ANOVA two-way e pelo post-hoc de Tukey, com nível de significância de 5%. Em relação à microestrutura, a calcinação proporcionou melhor distribuição e homogeneização das NPZnO entre as partículas de vidro do CIV. A microdureza, resistência à compressão, à tração diametral e à flexão, após utilização do método da calcinação, apresentaram os melhores resultados. Assim, este estudo indica o método de calcinação quando da mistura de NPZnO ao CIV, uma vez que o mesmo demonstrou ser promissor, diante de todos os testes analisados. / The aim of this study was to evaluate the incorporation of zinc oxide nanoparticles (NPZnO) in concentrations of 3, 5 and 7% on mechanical and physical properties of glass ionomer cement (GIC) Ketac Molar Easymix. The mixture of NPZnO the MIC was conducted by manual method and the calcination. The properties evaluated were: microstructural analysis, Vickers hardness, compressive strength, diametral tensile strength and flexural strength. The microesturural analysis was performed by SEM - FEG, the hardness with the aid of a digital microhardness (Micromet 2100) and other tests EMIC universal testing machine. Data were evaluated by two-way ANOVA test and the post-hoc Tukey, with 5% significance level. Regarding the microstructure, the calcination provided better distribution and mixing of NPZnO between the glass particles of the MIC. The hardness, compressive strength, diametral tensile strength and flexural strength after use of the calcination method, showed the best results. Thus, this study indicates the calcination method when mixing NPZnO the GIC once it has shown promise in front of all the analyzed tests.