Littérature scientifique sur le sujet « Poly (methyl methacrylate) (PMMA) Thin Films »
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Articles de revues sur le sujet "Poly (methyl methacrylate) (PMMA) Thin Films"
Yuwono, A. H., J. M. Xue, J. Wang, H. I. Elim, Wei Ji, Yuan Yuan Li et T. J. White. « Nonlinear Optical Behavior of Transparent Nanohybrids of Nanocrystalline TiO2 in Poly(methyl methacrylate) Prepared by In Situ Sol-Gel Polymerization Technique ». Journal of Metastable and Nanocrystalline Materials 23 (janvier 2005) : 367–70. http://dx.doi.org/10.4028/www.scientific.net/jmnm.23.367.
Texte intégralLiu, Chih-Ting, Chia-Chan Tsai, Chien-Wei Chu, Mu-Huan Chi, Pei-Yun Chung et Jiun-Tai Chen. « Dewetting of polymer thin films on modified curved surfaces : preparation of polymer nanoparticles with asymmetric shapes by anodic aluminum oxide templates ». Soft Matter 14, no 15 (2018) : 2772–76. http://dx.doi.org/10.1039/c8sm00318a.
Texte intégralPanapoy, M., P. Wannasut et Bussarin Ksapabutr. « Improvement of UV Protection Properties in Poly(Methyl Methacrylate) Sheet Coated by Titanium Dioxide/ Poly(Methyl Methacrylate) Hybrid Film ». Advanced Materials Research 55-57 (août 2008) : 501–4. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.501.
Texte intégralB, Chandar Shekar, Sathisha S, Sulana Sundari, Sunnitha S et Sharmila C. « PREPARATION OF MESOSCOPIC STRUCTURE POLY METHYL METHACRYLATE THIN FILMS FOR AFM DATA STORAGE DEVICES. » Kongunadu Research Journal 2, no 1 (4 novembre 2019) : 1–3. http://dx.doi.org/10.26524/krj54.
Texte intégralMelo, Lis G. A., Adam P. Hitchcock, Darija Susac, Juergen Stumper et Viatcheslav Berejnov. « Effect of UV radiation damage in air on polymer film thickness, studied by soft X-ray spectromicroscopy ». Physical Chemistry Chemical Physics 20, no 24 (2018) : 16625–40. http://dx.doi.org/10.1039/c7cp08621k.
Texte intégralMergen, Ömer Bahadır, Ertan Arda et Gülşen Akın Evingür. « Electrical, mechanical, and optical changes in MWCNT-doped PMMA composite films ». Journal of Composite Materials 54, no 18 (6 janvier 2020) : 2449–59. http://dx.doi.org/10.1177/0021998319898507.
Texte intégralTippo, Tossapol, Chanchana Thanachayanont, Chabaiporn Junin, Seeroong Prichanont, Micheal Hietschold et Apinunt Thanachayanont. « Effect of Substrates on Preparation of Dissolved PMMA in DMF Solution Used as a Dielectric Layer in Otfts ». Advanced Materials Research 802 (septembre 2013) : 79–83. http://dx.doi.org/10.4028/www.scientific.net/amr.802.79.
Texte intégralZhao, Dong Lin, Hong Mei Chai, Yun Fang Liu et Zeng Min Shen. « Electrical Resistance Response of Carbon Nanotube / PMMA / PVAc Composite Sensors to Organic Vapours at Low Vapour Concentrations ». Key Engineering Materials 334-335 (mars 2007) : 809–12. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.809.
Texte intégralDe Nisi, F., R. Francischello, A. Battisti, A. Panniello, E. Fanizza, M. Striccoli, X. Gu, N. L. C. Leung, B. Z. Tang et A. Pucci. « Red-emitting AIEgen for luminescent solar concentrators ». Materials Chemistry Frontiers 1, no 7 (2017) : 1406–12. http://dx.doi.org/10.1039/c7qm00008a.
Texte intégralS. Ali, Ali, Karema M. Zaidan et Adnan Issa Al-Badran. « Preparation of Poly (methyl methacrylate) thin film Capacitors on ITO-glass substrate ». Muthanna Journal of Pure Science 9, no 2 (31 décembre 2022) : 22–28. http://dx.doi.org/10.52113/2/09.02.2022/22-28.
Texte intégralThèses sur le sujet "Poly (methyl methacrylate) (PMMA) Thin Films"
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.
Texte intégralMaire, 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.
Texte intégralCecci, 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.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
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
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 eletricidade após atingirem percolação em matrizes poliméricas isolantes. Neste trabalho, é descrito o uso de nanotubos de carbono de camadas múltiplas (NTCMs) na produção de filmes poliméricos flexíveis transparentes e condutores como alternativa ao uso do óxido de índio dopado com estanho (ITO) em células solares orgânicas. Os nanotubos foram dispersos e purificados em solução aquosa de dodecil sulfato de sódio (SDS) pelos processos de sonicação e centrifugação, e a dispersão monitorada por espectroscopia UV-Vis e potencial ?. Os nanocompósitos foram produzidos via polimerização in situ do monômero metacrilato de metila (MMA) na presença de 0 a 1% p/p NTCs e os filmes depositados através da técnica de revestimento por rotação a alta velocidade (spin coating). A reação de polimerização foi acompanhada pela calorimetria exploratória diferencial (DSC). Verificou-se que na presença de NTCs, a taxa de conversão do monômero é acelerada. A cinética de degradação térmica foi avaliada pelo método de Broido utilizando a análise termogravimétrica (TGA). Foi observado que os NTCs aumentam a estabilidade térmica do PMMA, retardando a degradação por despolimerização. Estudos por espectroscopia FT-IR mostraram uma banda de absorção em 1601 cm-1, (C=C), a qual não é característica do PMMA, indicando que os NTCs participam da polimerização do PMMA. Para concentrações de até 1% p/p de NTCs, os filmes PMMA/NTC apresentaram excelentes propriedades ópticas. Ou seja, baixo coeficiente de absorção, na ordem de 103 cm-1, altos valores de gap óptico (Eopt), entre 3,2 e 4,14 eV, e alta transparência por todo espectro visível, entre 88 e 93%. Nas mesmas concentrações, foi observada uma diminuição substancial na resistividade elétrica dos filmes em 8 ordens de grandeza (de 1016 para 108 ?/quadrado), comparados ao filme de PMMA puro. Entretanto, a faixa de resistividade alcançada ainda é típica de materiais isolantes. Estudos de otimização poderiam originar filmes PMMA/NTC como uma alternativa promissora para ITO em OPVs
Abstract: Carbon nanotubes (CNTs) have interesting features for applications in transparent electrodes. When dispersed at the nanoscale, they become transparent within the visible range and are able to conduct electricity after reaching the percolation threshold in an insulating polymer matrix. In this work, the use of multi-walled carbon nanotubes (MWCNTs) is described for the production of flexible transparent conducting polymer films as an alternative to the use of indium-tin oxide (ITO) in organic solar cells. The nanotubes were dispersed and purified in an aqueous solution of sodium dodecyl sulfate (SDS) by the process of sonication and centrifugation, and the dispersion monitored by UV-Vis spectroscopy and ? potential. The nanocomposites were produced via in situ polymerization of the monomer methyl methacrylate (MMA) in the presence of 0 to 1 %wt. of CNTs. The films were deposited by the spin-coating technique. The polymerization reaction was monitored by differential scanning calorimetry (DSC). It was found that in the presence of CNTs, the conversion rate of the monomer is accelerated. The kinetics of thermal degradation was measured according to the Broido's method by using thermogravimetric analysis (TGA). It was observed that CNTs increase the thermal stability of PMMA, slowing degradation by depolymerization. FT-IR data showed an absorption band at 1601 cm-1 (C = C), which is not characteristic of PMMA, indicating that the CNTs takes place in the polymerization of PMMA. For concentrations up to 1wt% of CNTs, the PMMA/CNT films had excellent optical properties, i.e., a low absorption coefficient in the order of 103 cm-1, wide optical gap (Eopt) between 3.2 and 4.14 eV, and high transparency within the whole visible range, between 88 and 93%. In the same concentrations, the electrical resistivity of the films dropped by 8 orders of magnitude (from 1016 to 108 ?/sqr), compared to the pure PMMA film. Even though this electrical resistivity value is typical of insulating materials, further optimization studies could provide PMMA/CNT films as a promising alternative to ITO in OPV
Mestrado
Ciencia e Tecnologia de Materiais
Mestre em Engenharia Química
Hodgson, Mark Russell. « Co-operative degradation in thin films of poly(methyl methacrylate) and poly(ethylene terephthalate) ». Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4334/.
Texte intégralGervasio, Michelle Rose. « Sub-micron Patterning of ZnO-PMMA Hybrid Films ». Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/86887.
Texte intégralPh. D.
Sub-micron patterning is an integral part of making many modern technologies such as memory storage devices or integrated circuits. As this technology becomes smaller and smaller, the limiting factor for making these devices has become the ability to manufacture effectively at the appropriate scale. Traditional commercial manufacturing methods lack the resolution needed to attain small enough features. Manufacturing methods that can make small enough features are often either extremely expensive or offer incomplete control of the feature morphology. Imprint lithography is a high-throughput, inexpensive alternative to making sub-micron features that can be tailored to work with a variety of materials. Imprint lithography is simple process in which a patterned stamp is pressed into a softened film of material in order to transfer the pattern of the stamp onto that material. Traditionally, imprint lithography works best with polymers and researchers have struggled to pattern nanoparticle-based materials. This work has achieved high-fidelity pattern transfer onto polymer-nanoparticle hybrid films with feature sizes on the same order as the polymer films found reported in literature. The polymer-nanoparticle hybrid was realized by creating a liquid suspension of functionalized ZnO nanoparticles and poly(methyl methacrylate) (PMMA) in a solvent. The ZnO particles were functionalized by adding nonanoic acid, allowing the normally polar particles to disperse in the non-polar solvent needed to dissolve the PMMA. This suspension was spread onto a glass substrate, imprinted with a patterned stamp, allowed to dry, and was demolded. The final result was the successful transfer of features ranging from 250 nm to 1 μm in size with good fidelity. The effect of the ZnO content as well as the method of combining the suspension components on the feature fidelity was studied. To help prove the broad applicability of this imprint method, it was adapted for use with polymer-derived ceramics. Additionally, a computer simulation was developed to help understand the behavior of the nanoparticle-polymer suspension during the imprint process.
Manole, Claudiu Constantin. « MOCVD and electrochemical polymeric thin films : elaboration, characterization, properties ans applications ». Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0165/document.
Texte intégralThe thesis deals with two types of polymeric thin films: poly (methyl methacrylate) (PMMA) and polypyrrole (PPy). The thin films were grown by a dry and a wet route. The dry route involved the growth of the polymeric films by an original process of Chemical Vapor Deposition, namely Photo-CVD. The growth involves the UV activation of the monomer species in the gas phase. Both PMMA and PPy were obtained for the first time by this Photo-CVD. The characterization highlighted properties with possible applications in microelectronics, micro-optics and as heat generating devices. The wet route involved the growth of polymeric and hybrid organic/inorganic thin films by an electrochemical approach. Organic PPy and inorganic TiO2 nanostructures were obtained and characterized by various electrochemical techniques. The growth aspects of PPy were supplementary highlighted by the Surface Plasmon Resonance
Perez, Paul. « Fabrication of 3D Microfluidic Devices by Thermal Bonding of Thin Poly(methyl methacrylate) Films ». Thesis, 2012. http://hdl.handle.net/10754/237271.
Texte intégralSilva, 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.
Texte intégralHuang, Hui-Fang, et 洪慧芳. « Dispersion, Aggregation and Segregation Behaviors of Zirconia Nanoaprticles within Poly(methyl methacrylate) Thin Films ». Thesis, 2011. http://ndltd.ncl.edu.tw/handle/11566801499322681806.
Texte intégral國立中央大學
化學工程與材料工程研究所
99
In this work, I investigated organic-inorganic thin films of poly (methyl methacrylate) (PMMA) homopolymers of three molecular weights (MWs, Mn =17, 45 and 105 kg/mol) hybridized with zirconia nanoparticles (ZrO2 NPs). Prior to mixing with PMMA, the ZrO2 NPs were surface-modified by grafting a layer of various carboxylic acids (methacrylic acid, butyric acid and linoleic acid). For brevity, the surface-modified ZrO2 NPs were designated as MA-ZrO2, BA-ZrO2 and LOA-ZrO2. In the following context, I systematically studied the dispersion, aggregation and segregation behaviors of surface-modified ZrO2 NPs within the PMMA thin films. The dispersion, aggregation and segregation behaviors of carboxylic acid-grafted ZrO2 NPs within PMMA homopolymers depend on the enthalpic effect. According to the solubility parameters, I proposed that the MA or BA dispersants are miscible with PMMA whereas LOA is immiscible with PMMA. The former cases revealed the dispersion of small MA- and BA-ZrO2 clusters within PMMA homopolymers whereas the latter case was found to form large aggregates. The formation of the large aggregates is ascribed to reducing the unfavorable contacts between LOA-ZrO2 NPs and PMMA chains. Additionally, the ZrO2 NPs with surface grafted by a layer of LOA were found to preferentially segregate to the boundaries of cracks within the LOA-ZrO2/PMMA films. As a result, the conformational entropy loss associated with stretching of PMMA chains could be minimized. Moreover, LOA has the lowest surface energy. It is likely that LOA-ZrO2 nanoparticles preferentially aggregate to the free surface of poly (methyl methacrylate) thin films when thermal-annealing were implemented at a high temperature far above the glass transition temperature of PMMA. As a result, the thermal-annealed LOA-ZrO2/PMMA thin films revealed a morphology of dewetting. By contrast, the thin films of MA-ZrO2/PMMA and those of BA-ZrO2/PMMA still revealed homogeneous in thickness (i.e., fully wetting) on substrates.
Yang, Wei-Chen, et 楊濰甄. « Morphological Evolution of Thermal Annealed Deuterated Polystyrene-block-Poly(methyl methacrylate) Thin Films on a UV-Treated Polystyrene Layer ». Thesis, 2018. http://ndltd.ncl.edu.tw/handle/jy5nvj.
Texte intégral國立中央大學
化學工程與材料工程學系
106
In this study, the structural evolution of deuterated polystyrene-block-poly (methyl methacrylate) (dPS-b-PMMA) thin films with thermal annealing of various durations on a layer of UV-irradiated polystyrene were studied by means of atomic force microscopy (AFM), transmission electron microscopy (TEM), grazing incident small-angle X-ray scattering (GISAXS) and neutron reflectivity (NR). Upon exposure to UV light in a glove box and in air, the PS layer was cross-linked and neutralized. dPS-b-PMMA thin films supported on the cross-linked/neutralized PS layer were prepared by spin coating and then the specimens were isothermally annealed at 210280∘C under vacuum. We found that thermal annealing at a temperature below 270 oC would preferentially grew a wetting layer of dPS on top. The formation of the preferential wetting layer is due to the fact that the surface energy (dPS) of the dPS block was not equal to that (PMMA) of the PMMA block. In other words, below 270 oC, the free surface of the dPS-b-PMMA was not neutral. When annealed at 270 oC, dPS-b-PMMA would have a neutral free surface. Besides, we found that 270 oC-thermal annealing of a short period first led to the formation of perpendicular-oriented lamellae. Nevertheless, prolonged thermal annealing produced phase transitions from standing lamellae to vertical nanocylinders and finally to perforated-layer-like nanostructures. In this thesis, we would propose possible mechanisms about the morphology evolution.
Chapitres de livres sur le sujet "Poly (methyl methacrylate) (PMMA) Thin Films"
Ellison, E. H., et J. K. Thomas. « Photophysical Study of Thin Films of Polystyrene and Poly(methyl methacrylate) ». Dans Multidimensional Spectroscopy of Polymers, 410–24. Washington, DC : American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0598.ch024.
Texte intégralZhang, Q., C. Zheng, K. Sagoe-Crentsil et W. Duan. « Transfer and Substrate Effects on 2D Materials for Their Sensing and Energy Applications in Civil Engineering ». Dans Lecture Notes in Civil Engineering, 409–19. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_42.
Texte intégralSingh, Sudhanshu, et Umesh Kumar Dwivedi. « Fabrication and Morphological Characterization of Barium Titanate-Based Polymeric Nanocomposite Thin Films ». Dans Multifunctional Nanocarriers for Contemporary Healthcare Applications, 50–59. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4781-5.ch003.
Texte intégralActes de conférences sur le sujet "Poly (methyl methacrylate) (PMMA) Thin Films"
Kim, Ickchan, Mihai G. Burzo, Pavel L. Komarov et Peter E. Raad. « Thermal Conductivity Measurements of Ultra-Thin Amorphous Poly(Methyl Methacrylate) (PMMA) Films ». Dans ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66507.
Texte intégralPandey, Nisha, Arunendra Kumar Patel et Amrita Dwivedi. « Crystalline properties of ZnO doped poly (methyl methacrylate) PMMA thin films ». Dans NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS : NCPCM2020. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0061155.
Texte intégralGhebremichael, F., et R. J. Knize. « Linear Electro-Optic measurements of Dye-Doped Polymers ». Dans Organic Thin Films for Photonic Applications. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.the.3.
Texte intégralPandey, Nisha, Richa Khaling, Priyanka Verma, Poonam Pendke et Arunendra Patel. « Characterization of TiO2 doped poly (methyl methacrylate) PMMA thin films using XRD ». Dans PROF. DINESH VARSHNEY MEMORIAL NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS : NCPCM 2018. Author(s), 2019. http://dx.doi.org/10.1063/1.5098705.
Texte intégralKoike, Yasuhiro. « High Speed Polymer Optical Fiber and Related Photonics Polymer ». Dans Organic Thin Films for Photonic Applications. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.thb.2.
Texte intégralAbdeldayem, Hossin, Angela Shields, William K. Witherow, Benjamin G. Penn et Donald O. Frazier. « Benzil : a promising third order nonlinear organic material ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.mhh.7.
Texte intégralLizeng, Zhao, Lu Zhengzhong, Zhang Xiulang, Zhang Dongxiang, Mi Xin, Nie Yuxin, Wang Duoyuan et al. « Photon-Gated Photochemical Hole Burning in Zinc-Tetrabenzoporphyrin/Aromatic Cyanide System ». Dans Persistent Spectral Hole Burning : Science and Applications. Washington, D.C. : Optica Publishing Group, 1991. http://dx.doi.org/10.1364/pshb.1991.the6.
Texte intégralSingh, Khushboo, Gauri Negi et G. C. Joshi. « Study of excitation energy transfer from Coumarin102(donor) to Coumarin6(acceptor) doped in poly-methyl methacrylate (PMMA) thin film ». Dans PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON CONDENSED MATTER PHYSICS 2014 (ICCMP 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4915471.
Texte intégralShen, Hui, et N. D. Gannon. « Analysis of the Mechanical Properties of Pristine and Thermally Aged PC/PMMA Micro and Nanolayered Films ». Dans ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37344.
Texte intégralMajumder, Manisree, Aloke Kumar Chakraborty, Biswanath Mallik, M. R. Singh et R. H. Lipson. « Silver Nanoparticles Dispersed in Poly(methyl methacrylate) Thin Films : Spectroscopic and Electrical Properties ». Dans TRANSPORT AND OPTICAL PROPERTIES OF NANOMATERIALS : Proceedings of the International Conference—ICTOPON-2009. AIP, 2009. http://dx.doi.org/10.1063/1.3183443.
Texte intégral