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Dissertations / Theses on the topic 'PMMA thin films'

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Published: 7 September 2023

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1

Sauñi, Camposano Yesenia Haydee. "Synthesis of Hydroxyapatite thin films on PMMA Printed Substrates." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9902.

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Each year millions of people suffer from bone defects resulting from trauma, tumors or bone-related injuries. Therefore there is a need to continuously develop new materials or improve the properties of the materials currently used, for bone replacement or implant applications. Polymethyl methacrylate (PMMA) has proven to be a promising alternative as a material for implants; however, there are still some limitations inherent to this material, particularly related to its surface properties. This thesis work is focused on the fabrication of hydroxyapatite (HAp) thin films on the surface

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2

Okerberg, Brian. "Morphological Studies of Crystallization in Thin Films of PEO/PMMA Blends." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/29213.

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Morphological development during crystallization of thin films of poly(ethylene oxide) (PEO) / poly(methyl methacrylate) (PMMA) blends has been reported. Studies have focused on the effects of the blend composition, PMMA molecular weight, film thickness, and crystallization temperature on the observed crystal morphology. As the blend composition was varied from 90 to 30 wt% PEO, the crystal morphology varied from spherulites to needles and dendrites. Variation of the crystallization temperature and PMMA molecular weight resulted in similar changes in morphology. A morphological map demonst

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3

Yuan, Chuqing. "Topographic Pattern Directed Phase Separation in PAN/PMMA Blend Thin Films." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525754114090085.

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4

Liu, Xiangyu. "Highly Ordered Phase-separated PS/PMMA Blend Thin Films Structures via Capillary Force Lithography." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462467586.

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5

Kim, Ick Chan. "Experimental investigation of size effect on thermal conductivity for ultra-thin amorphous poly(methyl methacrylate) (PMMA) films." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1348.

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6

Holroyd, Chloe. "Broadband vibrational sum frequency spectroscopy (VSFS) of modified graphene and polymeric thin films." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/broadband-vibrational-sum-frequency-spectroscopy-vsfs-of-modified-graphene-and-polymeric-thin-films(1b1abe44-8679-4384-993f-f9547f41f450).html.

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The surface-specific technique of vibrational sum frequency spectroscopy (VSFS) can provide vibrational information about chemical bonds at surfaces and interfaces. Two photons, of visible and infrared frequency, are spatially and temporally overlapped at a surface/interface to produce a photon at the sum frequency (SF) of the two input photons. As well as this process only being allowed in non-centrosymmetric media (i.e. VSFS is surface/interface specific), the SF process is enhanced when the IR beam is resonant with vibrational resonances. Broadband VSFS has been used in this project to stud

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7

He, Guping. "The Effect of Modified AuNPs on the Morphology and Nanostructure Orientation of PPMA-b-PMMA Block Copolymer Thin Films." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-154391.

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Block copolymer/inorganic nanoparticle hybrids draw great attention of scientists from various areas for their potential applications in diverse fields such as microelectronics, sensors, and solar cells. Inorganic nanoparticles (NPs) can be expected to be incorporated into block copolymers with order and selectivity by self-assembly of NPs and/or by synergistic self-assembly between NPs and block copolymers. The morphology and nanostructure order of block copolymers can be also adjusted and directed by incorporation of NPs. In this study, the effect of the size and modification of AuNPs on the

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8

McGiveron, James Kevin. "Aspects of sol-gel chemistry : the adsorption properties of silica sol-gel monoliths and the preparation of indium(III) oxide and indium(III)/tin(IV) oxide thin films by the inorganic sol-gel process." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294504.

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9

Maire, Helene C. "Characterization of cylindrical nano-domains in thin films of polystyrene-poly(methyl methacrylate) diblock copolymer studied via atomic force microscopy." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1037.

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10

APRILE, GIULIA. "Directed self-assembly of Di-Block copolymers for a new idea of length standards at the nanoscale." Doctoral thesis, Università del Piemonte Orientale, 2017. http://hdl.handle.net/11579/86901.

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Di-Block Copolymers (DBCs) are materials composed of two different monomer subunits linked together. These blocks are able to self-assemble in different microphases with various morphologies (cylinders, lamellae, spheres, gyroids). For this reason, the DBCs are widely investigated as patterning and nanofabrication technique. In this work, the combination of conventional lithographic approaches with the Self-Assembly of DBCs is investigated, to develop a new generation of lateral length standards at the nanoscale (under 70 nm) with a low cost approach based on the natural constants of matter. T

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11

Giacon, Virginia Mansanares. "Modificação da superficie de filmes de PMMA via polimerização por plasma de CHF3." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267666.

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Orientador: Julio Roberto Bartoli<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-04T22:28:46Z (GMT). No. of bitstreams: 1 Giacon_VirginiaMansanares_M.pdf: 2837652 bytes, checksum: cc8b7a2c68b1b5f694c6e06c1feb5bfb (MD5) Previous issue date: 2004<br>Resumo: Materiais poliméricos são alternativas aos materiais inorgânicos na fabricação de dispositivos ópticos como guias de ondas e fibras ópticas (POF) para transmissão de luz ou sinal. Isso porque, a estrutura molecular dos polímeros pode ser modelada com vers

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12

Maciel, Alexandre de Castro. "Fabricação e estudo das propriedades de transporte de transistores de filmes finos orgânicos." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-18122012-114317/.

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A eletrônica digital desempenha papel essencial no desenvolvimento e manutenção dos padrões de vida em prática hoje no mundo. A peça fundamental para a criação desta era tecnológica é sem dúvidas o transistor. Com o advento de novos materiais, a busca por transistores que oferecem novas oportunidades de processamento e aplicação permitiu que uma nova área fosse criada: a eletrônica orgânica. Transistores de efeito de campo baseados em filmes finos de materiais orgânicos têm recebido grande atenção nas últimas décadas. Apresentamos um estudo experimental e teórico de transistores de efeito de c

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13

Sheridan, A. K. "Control of gain in conjugated polymers and perylene dyes." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/4133/.

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This thesis presents an investigation into the factors which control the gain and amplification properties in conjugated materials. Conjugated polymers and perylene dyes are highly fluorescent, are easy to process into thin films, and exhibit strong amplification over a broad gain bandwidth making them ideal for use in lasers and amplifiers. The stimulated emission created when thin films of the red emitting polymer poly(2-methoxy-5-(2'-ethylhexyloxy)- p-phenylenvinylene) (MEH-PPV) were photoexcited with high energy laser pulses was investigated. This was characterised by a dramatic narrowing

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Padilha, Giovana da Silva 1976. "Estudo das variaveis de fluoração via plasma na deposição e crescimento de polimero parcialmente fluorado sobre filmes de PMMA." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267452.

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Orientador: Julio Roberto Bartoli<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-06T09:00:39Z (GMT). No. of bitstreams: 1 Padilha_GiovanadaSilva_M.pdf: 1555922 bytes, checksum: 035b74427e55cfdd28217830ff384c88 (MD5) Previous issue date: 2005<br>Resumo: Dispositivos ópticos poliméricos têm sido promissores para aplicação em comunicações, principalmente na utilização em redes de curta distância devido ao fácil processamento e baixo custo quando comparado aos materiais ópticos fabricados com sílica. Na fabric

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15

He, Guping [Verfasser], Brigitte [Akademischer Betreuer] Voit, and Christine [Akademischer Betreuer] Papadakis. "The Effect of Modified AuNPs on the Morphology and Nanostructure Orientation of PPMA-b-PMMA Block Copolymer Thin Films / Guping He. Gutachter: Brigitte Voit ; Christine Papadakis. Betreuer: Brigitte Voit." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://d-nb.info/1068448865/34.

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16

Warnicke, Peter. "Tailored Properties of Ferromagnetic Thin Films." Doctoral thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9403.

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Magnetic thin films and patterned nanostructures have been studied with respect to their magnetic properties using SQUID-magnetometry, magnetic force microscopy, electrical measurements, and micromagnetic calculations. Properties of vortex domain walls, trapped in Permalloy nanowires with artificial constrictions, were investigated experimentally and by numerical calculations. In particular, the geometrical extent and strength of the pinning potential were evaluated. In these wires, long-range vortex domain wall displacement induced by spin polarized alternating currents was obtained numerical

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17

Cavallari, Marco Roberto. "Filmes de poli (3-hexiltiofeno) (P3HT) para transistores de filmes finos orgânicos utilizados como sensores." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-29122014-165104/.

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A importância da pesquisa em eletrônica orgânica, se comparada à microeletrônica convencional baseada principalmente em silício, surge pela presença de inúmeros semicondutores e técnicas de deposição de baixo custo e em grande superfície. Os Transistores de Filmes Finos Orgânicos (OTFTs, do inglês Organic Thin-Film Transistors) são a unidade fundamental em circuitos eletrônicos e, geralmente, apresentam a estrutura de um transistor de efeito de campo. Podem ser fabricados sobre substratos plásticos e oferecem grande número de aplicações como: mostradores, etiquetas de identificação por rádio f

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18

Samoei, Victor K. "Fabrication and Characterization of Thin film Pressure Sensors using Novel Materials." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1596762165322848.

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19

Cecci, Ricardo Rodrigo Ramos. "Síntese e caracterização de nanocompósitos de PMMA/NTC para aplicações em células fotovoltaicas orgânicas." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266636.

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Orientadores: Júlio Roberto Bartoli, Elizabeth Grillo Fernandes<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-22T08:51:19Z (GMT). No. of bitstreams: 1 Cecci_RicardoRodrigoRamos_M.pdf: 4182332 bytes, checksum: 4424cc557c439a1602d15a95921a2b25 (MD5) Previous issue date: 2013<br>Resumo: Nanotubos de carbono (NTCs) apresentam características interessantes para aplicações em eletrodos transparentes. Quando dispersos em escala nanométrica são transparentes ao espectro da luz visível e são capazes de conduzir el

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20

Hutjens, Charles Michael. "Morphology Control for Model Block Copolymer/Nanoparticle Thin Film Nano-Electronic Devices on Conductive Substrates." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1374496041.

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21

Tsai, Ming-Che, and 蔡明哲. "The study of TiN/Al thin films on PMMA by Magnetron Sputtering." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/21880832462952969845.

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碩士<br>南台科技大學<br>機械工程系<br>94<br>Acrylic(PMMA) has the best impact resistant, pressure resistant, and good optical properties, so it is applied in the optics lens, sunglasses or windscreen of transportation. Titanium nitride has the characteristic of the high hardness and high wear resistant, is often used as a protective coating for corrosion and wear. It is a barrier material kind of frequently used in semiconductor process. The purpose of this paper is deposition titanium nitride films by magnetron sputtering on PMMA. Hope that acrylic has better value. We deposited a layer of aluminum film b

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22

Deily, Kevin J. Guo Ruyan Lanagan Michael Thomas. "Dielectric and optical characterization of polar polymeric materials chromophore entrained pmma thin films /." 2008. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-3157/index.html.

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23

Perez, Paul. "Fabrication of 3D Microfluidic Devices by Thermal Bonding of Thin Poly(methyl methacrylate) Films." Thesis, 2012. http://hdl.handle.net/10754/237271.

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The use of thin-film techniques for the fabrication of microfluidic devices has gained attention over the last decade, particularly for three-dimensional channel structures. The reasons for this include effective use of chip volume, mechanical flexibility, dead volume reduction, enhanced design capabilities, integration of passive elements, and scalability. Several fabrication techniques have been adapted for use on thin films: laser ablation and hot embossing are popular for channel fabrication, and lamination is widely used for channel enclosure. However, none of the previous studies have b

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Silva, Hernandez Carlos Ardenis A. "Molecular Dynamic Simulation of Thermo-Mechanical Properties of Ultra-Thin Poly(methyl methacrylate) Films." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7676.

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The thermal conductivity of PMMA films with thicknesses from 5 to 50 nanometers and layered over a treated silicon substrate is explored numerically by the application of the reverse non-equilibrium molecular dynamics (NEMD) technique and the development of a coarse-grained model for PMMA, which allows for the simulation time of hundreds of nanoseconds required for the study of large polymer systems. The results showed a constant average thermal conductivity of 0.135 W/m_K for films thickness ranging from 15 to 50 nm, while films under 15 nm in thickness showed a reduction of 30% in their cond

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25

Guruvenket, S. "Plasma Surface Engineering - Studies On Nitride Coatings And Surface Modification Of Polymers." Thesis, 2005. https://etd.iisc.ac.in/handle/2005/1460.

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Guruvenket, S. "Plasma Surface Engineering - Studies On Nitride Coatings And Surface Modification Of Polymers." Thesis, 2005. http://etd.iisc.ernet.in/handle/2005/1460.

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27

Tsung-SyunHuang and 黃琮訓. "Investigation of PMMA Dielectric Layer Applied in Organic Thin Film Transistors." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/35779939515849450632.

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博士<br>國立成功大學<br>微電子工程研究所碩博士班<br>98<br>The structure and electric characteristics of PMMA-based organic thin film transistor and their pentacene film grown on PMMA film have been investigated in this dissertation Four solvents, toluene, p-xylene, o-Dichlorobenzene, and chloroform were selected to dissolve PMMA and AFM was used to measure the grain size and roughness of pentacene grown on PMMA. Several material characterization techniques, such as X-ray diffraction (XRD), contact angle, X-ray photoelectron spectroscopy(XPS) and atomic force microscope (AFM) were performed to characterize the mat

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Lin, Yuan-hung, and 林元弘. "Fabrication and Characterization of Polymethylmethacrylate (PMMA) Thin Film by Plasma Polymerization." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/c2vf7b.

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碩士<br>國立中央大學<br>機械工程學系<br>101<br>Polymethylmethacrylate (PMMA), also called acrylic glass, is transparent, chemically stable, thermoplastic and inexpensive, making it suitable for many biochemical applications. Among different fabrication processes of PMMA such as gelation, injection and casting, plasma polymerization is the one capable of depositing nano scale films on almost any substrate uniformly and rapidly. In this study, we investigated the structure, composition, surface and mechanical properties of deposited PMMA films on glass by RF power plasma inside a vacuum chamber. The deposit

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Basumatary, Himalay. "Structure, Microstructure and Magnetic Properties of Fe-Ga and R-Fe based Magnetostrictive Thin Films." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/3191.

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Magnetostrictive materials belong to an important class of smart magnetic materials which have potential applications as ultrasonic transducers, sensors, actuators, delay lines, energy harvesting devices etc. Although, magnetostrictive property is exhibited by almost all ferro and ferrimagnetic materials, the R-Fe type (R represents rare earth elements) intermetallic compounds display maximum promise owing to the large magnetostriction exhibited by them at ambient temperature. Among the several R-Fe type compounds, Tb-Fe and Sm-Fe alloys are found to exhibit maximum room temperature positive a

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Basumatary, Himalay. "Structure, Microstructure and Magnetic Properties of Fe-Ga and R-Fe based Magnetostrictive Thin Films." Thesis, 2016. http://hdl.handle.net/2005/3191.

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Magnetostrictive materials belong to an important class of smart magnetic materials which have potential applications as ultrasonic transducers, sensors, actuators, delay lines, energy harvesting devices etc. Although, magnetostrictive property is exhibited by almost all ferro and ferrimagnetic materials, the R-Fe type (R represents rare earth elements) intermetallic compounds display maximum promise owing to the large magnetostriction exhibited by them at ambient temperature. Among the several R-Fe type compounds, Tb-Fe and Sm-Fe alloys are found to exhibit maximum room temperature positive a

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31

Kasman. "The growth of graphene/graphite thin film allotropes on copper substrates." Thesis, 2014. http://hdl.handle.net/1959.13/1047598.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Graphene, a monolayer of graphite, has drawn a great deal of attention for organic electronic applications. Excellent optical transmittance combined with its extraordinary electrical properties makes it an attractive material for using as a transparent, conductive electrode in the fabrication of organic solar cells (OSCs). To bring graphene to mass production, synthesis methods are required for its growth as a large-area film. Chemical vapour deposition (CVD) is a novel technique proposed to produce high quality, large-area graphene films. Rec

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Kai, Wang Pung, and 王鵬凱. "Synthesis and Photochromic Behavior of Azobenzene-based PMMA Copolymer in Solution and Thin Film." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/51933223841794334602.

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碩士<br>輔仁大學<br>化學系<br>90<br>The photochrome of azobenzene dye will induce trans-cis photoisomerization under ultra-visible light﹒The reverse reaction will be reverse by heat or light with different wavelength；Moreover , there are three properties : 1. Good arrangement of polymer , 2. Good solvation , 3. Good process to be drived easily , which can be applied in storage material of light in this kind of copolymer﹒Therefore , it is quite potential and valuable to do further research﹒ This research is to synthesize monomer with azobenzene and copolymerize with methyl methacrylate

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Huang, Hung-Jui, and 黃瑞鴻. "Study on Micro Wear Behavior of Silver and Copper Metal Thin Film on PMMA Substrate." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/kg37ju.

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碩士<br>崑山科技大學<br>機械工程研究所<br>96<br>The nano technology has been advanced continuously recent years. The micro-wearing behavior and mechanism of thin film material under micro/nano scale have discussed. The most research are discuss the properties of nano-tribology and the manufacturing process technology which sputtering on the PMMA substrate. The properties of nano-wearing experiments are measured by NanoTest and Pin-On Disc (POD), respectively. The experimental parameters are: applied load, rotational speed and rotational radius, etc. And analyze the surface morphology under wearing behavior,

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Kuan-TingSong and 宋冠廷. "The elimination of electrical hysteresis by nano-imprinted PMMA layer in organic thin-film transistors." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8f6wm3.

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Tsai, Shih-Pin, and 蔡士斌. "The Study of Laser-Induced Holographic Grating in Azo Dye-Doped PMMA Thin Film With Liquid Crystals." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/15526040556974238272.

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碩士<br>國立中山大學<br>物理學系研究所<br>91<br>The laser-induced holographic gratings in the Azo dye-doped PMMA thin films with liquid crystal were investigated by changing the temperature of the sample, the angle of two writing beams and the rubbing. The high power Q-switch pulse laser has been used as the writing beams and the He-Ne cw laser has been used as a real-time probe beam to detect the first order diffraction singals. The grating are the results of photo-isomerization of azo dye and diffusions of liquid crystal. The model has been established to analyze the first order diffraction signals in orde

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Yen-TingHuang and 黃彥庭. "Impact of the solvent affinity on the phase separation and subsequent crystallization behavior within P3HT/PMMA binary thin film." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/76718382569280810624.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>103<br>The effects of solvent affinity and mixing ratio in solutions on phase separation behavior of a binary blend system of poly(3-hexylthiophene- 2,5-diyl)(P3HT) and poly(methyl methacrylate)(PMMA) have been explored. The solvent affinity was found critical for the precipitation sequence of dissolved components during spin coating, which provides the background to elucidate the occurrence of vertical phase separation. The morphologies of horizontal phase separation are dominated by the mixing ratios of these two immiscible constituents. Upon obtained results, bo

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Chen, Jian-Zhi, and 陳建智. "A Study of the Adhesion Improvement on a Thin Film Deposited on the PMMA Substrate Using Buffer-Layered Structure." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/y7g57r.

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碩士<br>國立虎尾科技大學<br>光電工程系光電與材料科技碩士班<br>104<br>This study will be used polymethyl methacrylate (acrylic) as the substrate, by plasma enhanced chemical vapor deposition system (PECVD), thermal evaporation system, RF magnetron co-sputtering system, and spray painting, testing and adhesion improvement on a functional thin film that include hard coatings thin film, reflection thin film, anti-Glare Coating and transparent conductive thin film. The results showed that when the functional thin film adhered to the acrylic substrate only 0B degree level, in order to improve the adhesion of the functional

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"Simulation of Cerenkov radiation for second harmonic generation and experimental generation and experimental characterization of MNA/PMMA/quartz thin film waveguides." Chinese University of Hong Kong, 1995. http://library.cuhk.edu.hk/record=b5895596.

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by Lui Bong Chun, Richard.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1995.<br>Includes bibliographical references.<br>Abstract<br>Acknowledgment<br>Chapter Chapter 1 --- Introduction --- p.1<br>Chapter 1.1 --- Background for the Project --- p.1<br>Chapter 1.1.1 --- Interests in Blue-Green Laser --- p.1<br>Chapter 1.1.2 --- Progress of Blue-Green Laser --- p.2<br>Chapter 1.2 --- The Aim of the Project --- p.3<br>Chapter 1.3 --- Overview the Remaining Parts of this Thesis --- p.4<br>Chapter 1.4 --- References --- p.6<br>Chapter Chapter 2 --- Sum Frequency Generation --- p.8<b

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李威政. "The influence of molecular stresses and deformations on the optoelectronic efficiencies and life of conjugated polymer MEH-PPV via PMMA dispersion and thin film dewetting." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80299370999593253970.

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