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Dissertations / Theses on the topic 'Multilayered graphene'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Holliday, Nathan. "Processing and Properties of SBR-PU Bilayer and Blend Composite Films Reinforced with Multilayered Nano-Graphene Sheets." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1458300045.

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2

Костюк, Дмитро Миколайович, Дмитрий Николаевич Костюк та Dmytro Mykolaiovych Kostiuk. "Фізичні властивості магнітних наночастинок упровідній матриці". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/50030.

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Дисертацію присвячено комплексному дослідженню магніторезистивних і оптичних властивостей та газової чутливості приладових систем на основі масивів магнітних наночастинок (НЧ) NiFe2O4, СоFe2O4, Fe3O4 у провідній немагнітній матриці Ag або мультишарового графену. У роботі проаналізовано зв'язок між структурним станом НЧ і магніторезистивними, магнітооптичними та оптичними властивостями наноприладових систем. Встановлено механізми формування масивів спін-вентильних переходів при збільшенні товщини провідної матриці Ag від 5 до 20 нм і умов її температурної обробки (Тв = 600 К) та їх внесок у в

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3

Ghosh, Suchismita. "Thermal conduction in graphene and graphene multilayers." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957308711&SrchMode=2&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268427434&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2009.<br>Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 12, 2010). Includes bibliographical references (p. 96-107). Also issued in print.

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4

Mammadov, Samir, Jürgen Ristein, Julia Krone, et al. "Work function of graphene multilayers on SiC(0001)." Technische Universität Chemnitz, 2017. https://monarch.qucosa.de/id/qucosa%3A21190.

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The work function and electronic structure of epitaxial graphene as well as of quasi-freestanding graphene multilayer samples were studied by Kelvin probe and angle resolved photoelectron spectroscopy. The work function converges towards the value of graphite as the number of layers is increased. Thereby, n-type doped epitaxial graphene layers have a work function lower than graphite and p-type doped quasi-freestanding graphene layers exhibit a work function higher than graphite. We explain the behaviour by the flling of the pi-bands due to substrate interactions.

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5

Rao, Shraddha M. S. "Coherent optical interactions in graphene multilayers." Thesis, Heriot-Watt University, 2016. http://hdl.handle.net/10399/3202.

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The work discussed in this thesis deals with the generation, control and modulation of optical interactions in two-dimensional materials, specifically in unpatterned, subwavelength graphene multilayers, using the process of Coherent Perfect Absorption (CPA). It aims to address the problem of inefficient light-matter coupling at the nanoscale by studying new geometries for enabling total absorption in 50% absorbing graphene films. Total optical absorption is demonstrated and a 80% modulation of the absorption and scattering is achieved by controlling the relative phases of the interacting optic

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6

Frasca, Daniele [Verfasser]. "Multilayer Graphene Rubber Nanocomposites / Daniele Frasca." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1117028445/34.

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7

Musheghyan, Avetisyan Arevik. "Synthesis and characterization of multilayer graphene nanostructures." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667645.

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The goal of the present investigation is to examine the processing-structure-property relationships of multilayer graphene nanowall materials. Various plasma enhanced chemical vapor deposition (PECVD) processing parameters were altered to control the structure and morphology of the material. Growth parameters and substrate material were the major structural features studied, and these were characterized by spectroscopic techniques. The direct synthesis of graphene without catalysis on dielectric substrates, compatible with the complementary metal oxide semiconductor technology, is a stimulatin

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8

Khodkov, Tymofiy. "Probing the electrical properties of multilayer graphene." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/4352.

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Graphene is a new two-dimensional (2D) material with unique electrical transport, optical and mechanical properties. However, monolayer graphene (MLG) is a gapless semiconductor, which limits its relevance for transistor applications where a large on/off ratio of the current is required. In this work the investigation of transport properties of few-layer graphene (FLG) is presented. These 2D electronic systems offer a novel solution to the problem concerned the absence of an energy gap in single layer graphene, since they exhibit an electric field and stacking-dependent band gap in the energy

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9

Xian, Lede. "Electronic structure and interlayer coupling in twisted multilayer graphene." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51811.

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It has been shown recently that high-quality epitaxial graphene (EPG) can be grown on the SiC substrate that exhibits interesting physical properties and has great advantages for varies device applications. In particular, the multilayer graphene films grown on the C-face show rotational disorder. It is expected that the twisted layers exhibit unique new physics that is distinct from that of either single layer graphene or graphite. In this work, by combining density functional and tight-binding model calculations, we investigate the electric field and doping effects on twisted bilayer graphene

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10

Maneshian, Mohammad Hassan. "The Influence of Ohmic Metals and Oxide Deposition on the Structure and Electrical Properties of Multilayer Epitaxial Graphene on Silicon Carbide Substrates." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc68009/.

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Graphene has attracted significant research attention for next generation of semiconductor devices due to its high electron mobility and compatibility with planar semiconductor processing. In this dissertation, the influences of Ohmic metals and high dielectric (high-k) constant aluminum oxide (Al2O3) deposition on the structural and electrical properties of multi-layer epitaxial graphene (MLG) grown by graphitization of silicon carbide (SiC) substrates have been investigated. Uniform MLG was successfully grown by sublimation of silicon from epitaxy-ready, Si and C terminated, 6H-SiC wafers in

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11

KANDYBA, VIKTOR. "Electronic structure of single and few layered graphene studied by angle resolved photoemission spectro-microscopy." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2929830.

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This thesis reports the study of electronic band structure of single and few layered graphene grown by thermal decomposition of SiC at the surface and by C-sublimation on Ru single crystals. Growth conditions were optimized in order to obtain big few micrometer sized graphene domains. For the first system twisted multilayer graphene domains were found and chosen for study. On ruthenium only single layer graphene domains and also the domains with incorporated bilayer patches were obtained and their electronic properties were investigated after oxidation-reduction reactions at graphene/Ru inter

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12

Kumar, Ajay. "An Investigation of Functionalization, Electronic structure of Multilayer Graphene Nanoflake Films (MGNFs)and their electrochemical properties." Thesis, University of Ulster, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516459.

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13

Bocktor, Ashraf Boshra. "Vibrational resonance study of multilayers of diatomic molecules on graphite using electron scattering." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613708.

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14

Kok, Yin Nan. "Nanoscale multilayer Me-graphite coatings grown by combined steered cathodic arc/unbalanced magnetron sputtering." Thesis, Sheffield Hallam University, 2005. http://shura.shu.ac.uk/19926/.

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Low friction, nanoscale multilayer carbon/chromium (C/Cr) coatings were successfully deposited by the combined steered cathodic arc/unbalanced magnetron sputtering technique (also known as Arc Bond Sputtering or ABS) using a Hauzer HTC 1000-4 PVD coater. The work described in this thesis has been directed towards understanding the effect of ion irradiation on the composition, microstructure, and functional properties of C/Cr coatings. This has been achieved by varying the bias voltage, U[B], over a wide range between -65 V and -550 V. C/Cr coatings were deposited in three major steps: (i) Cr+

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15

Pereira, Cristian Guilherme Barbosa. "Fabricação e caracterização mecânica da alumina reforçada com grafeno /." Bauru, 2019. http://hdl.handle.net/11449/191509.

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Orientador: Cesar Renato Foschini<br>Resumo: Os avanços na área da tecnologia e ciência dos materiais têm possibilitado grande evolução e contribuição para o desenvolvimento de materiais cerâmicos. Pesquisas associadas a esse tipo de material estão cada vez mais difundidas por apresentar características como: alta dureza, biocompatibilidade, estabilidade térmica, inércia química e resistência à corrosão. Entretanto, seu uso acaba sendo limitado por sua fragilidade. A utilização dos alótropos de carbono (grafeno, nanotubos e fulerenos) como material de reforço nas cerâmicas, têm sido muito estu

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16

Cuenca, Pauta Erick. "Visualisation de données dynamiques et complexes : des séries temporelles hiérarchiques aux graphes multicouches." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS054/document.

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L'analyse de données de plus en plus complexes, volumineuses et issues de différentes sources (e.g. internet, médias sociaux, etc.) est une tâche difficile. Elle reste cependant cruciale dans de très nombreux domaines d'application. Elle implique, pour pouvoir en extraire des connaissances, de mieux comprendre la nature des données, leur évolution ou les nombreuses relations complexes qu'elles peuvent contenir. La visualisation d'informations s'intéresse aux méthodes de représentations visuelles et interactives permettant d'aider un utilisateur à extraire des connaissances. C'est dans ce conte

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17

Carvalho, Andressa Caroline da Silva. "Análise da furação do aço inoxidável AISI 304 com a aplicação externa de nanofluidos em quantidade reduzida." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180635.

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A furação é um processo caracterizado por apresentar dificuldades em relação à formação e remoção do cavaco da região de corte, e à geração de altas temperaturas devido ao cisalhamento e encruamento do material no fundo do furo, principalmente, na usinagem do aço inoxidável austenítico. Com isso a presença do fluido de corte com boas propriedades de refrigeração e lubrificação faz-se necessária para preservar a vida da broca e garantir um acabamento satisfatório do furo. Contudo, com a tendência mundial de diminuição da quantidade de fluido de corte dispendido, tem-se buscado técnicas diferent

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18

Taktak, Raouia. "Survavibility in Multilayer Networks : models and Polyhedra." Thesis, Paris 9, 2013. http://www.theses.fr/2013PA090076/document.

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Dans cette thèse, nous nous intéressons à un problème de fiabilité dans les réseaux multicouches IP-sur-WDM. Etant donné un ensemble de demandes pour lesquelles on connaît une topologie fiable dans la couche IP, le problème consiste à sécuriser la couche optique WDM en y cherchant une topologie fiable. Nous montrons que le problème est NP-complet même dans le cas d'une seule demande. Ensuite, nous proposons quatre formulations en termes de programmes linéaires en nombres entiers pour le problème. La première est basée sur les contraintes de coupes. Nous considérons le polyèdre associé. Nous id

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19

Costa, Diego Rabelo da. "Transportes e confinamento em monocamada e bicamada de nanoestruturas de grafeno com diferentes bordas, interfaces e potenciais." reponame:Repositório Institucional da UFC, 2014. http://www.repositorio.ufc.br/handle/riufc/12555.

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COSTA, Diego Rabelo da. Transportes e confinamento em monocamada e bicamada de nanoestruturas de grafeno com diferentes bordas, interfaces e potenciais. 2014. 201 f. Tese (Doutorado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2014.<br>Submitted by Edvander Pires (edvanderpires@gmail.com) on 2015-06-01T22:18:12Z No. of bitstreams: 1 2014_tese_drcosta.pdf: 54910487 bytes, checksum: 82b386bac8259edaa10f6d5ff314bd42 (MD5)<br>Approved for entry into archive by Edvander Pires(edvanderpires@gmail.com) on 2015-

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20

Kurapati, Rajendra. "Investigation of Graphene Oxide Based Multilayered Capsules/Films for Drugs Delivery And Antimicrobial Applications." Thesis, 2013. http://etd.iisc.ernet.in/2005/3456.

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Polyelectrolyte multilayer capsules fabricated by layer-by-layer (LbL) self-assembly technique consistsing of core-shell structure have emerged as potential drug delivery systems along with their applications in micro-reactors, cosmetics, vaccines and antimicrobial coatings. Various ligands and stimuli responsive entities can be incorporated into the core and shell of the capsules for targeted delivery and/or controlled release applications. Though multilayer capsules have been studied extensively as delivery systems, their utility for encapsulation of hydrophobic drugs and multiple drugs have

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21

Kurapati, Rajendra. "Investigation of Graphene Oxide Based Multilayered Capsules/Films for Drugs Delivery And Antimicrobial Applications." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3456.

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Polyelectrolyte multilayer capsules fabricated by layer-by-layer (LbL) self-assembly technique consistsing of core-shell structure have emerged as potential drug delivery systems along with their applications in micro-reactors, cosmetics, vaccines and antimicrobial coatings. Various ligands and stimuli responsive entities can be incorporated into the core and shell of the capsules for targeted delivery and/or controlled release applications. Though multilayer capsules have been studied extensively as delivery systems, their utility for encapsulation of hydrophobic drugs and multiple drugs have

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22

Arifin, Rizal, and 艾利南. "Growth of layered graphene and the thermal stability of multilayered graphene on silicon carbide substrate by molecular dynamics simulation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/71946313326576524835.

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碩士<br>國立中央大學<br>物理研究所<br>99<br>The molecular dynamics simulation and simulated annealing method were applied to study the growth process of graphene and the thermal stability of layered graphene nanoribbons on 6H-SiC(0001) substrate. With an intention to understand the mechanisms that govern these panoramas, we tested two empirical potentials, i.e. the widely used Tersoff potential [Phys. Rev. B 39, 5566 (1989)] and its more refined version published years later by Erhart and Albe [Phys. Rev. B 71, 035211-1 (2005)]. We found that the modified Tersoff potential communicated by Erhart and Albe i

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23

Moura, Duarte Alexandre Campos Serra. "Free-standing multilayered membranes based on graphene and natural polymers for biomedical applications." Master's thesis, 2015. http://hdl.handle.net/1822/39438.

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Dissertação de mestrado integrado em Engenharia Biomédica (área de especialização em Biomateriais, Reabilitação e Biomecânica)<br>In several biomedical applications, one of the major disadvantages of natural polymers is their low mechanical performances. Such drawback has led scientists to search for new materials capable to improve their mechanical properties. In the last few years, graphene and graphene oxide (GO) nanocomposite materials have been proposed to be used in different applications due their outstanding mechanical and electrical properties. We hypothesized that the incorporati

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24

Fang, Po-Tung, and 方柏棟. "Electonic Properties of Twisted Graphene Multilayers." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/32990097825499611075.

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碩士<br>國立臺灣大學<br>物理研究所<br>102<br>Graphene consists of the carbon atoms in the honeycomb structure. There are many exceptional properties of the graphene has been found. One of the unique properties is called Klein paradox, which states that the massless Dirac electrons could not be confined in the one-dimensional region by the electrostatic potential. Interestingly, recently experimental and theoretical studies have shown that the low-energy Dirac electron would be confined in the graphene bilayer with a small twist angle. Therefore, it is worth while to study the problem. In our thesis, we wil

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Carvalho, Ana Rita Malheiro da Silva. "Influência do teor de grafite exfoliada nas propriedades do polipropileno isotático." Master's thesis, 2017. http://hdl.handle.net/10316/83196.

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Dissertação de Mestrado Integrado em Engenharia do Ambiente apresentada à Faculdade de Ciências e Tecnologia<br>O principal objetivo deste trabalho é avaliar a viabilidade da incorporação de grafite recuperada de elétrodos em fim de vida provenientes da industria metalomecânica numa matriz de polipropileno, face à adição de grafeno multicamadas comercial. O polipropileno foi escolhido como material base pelo facto de ser um dos polímeros mais comercializados, cujo o seu processamento é fácil e apresenta uma r

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26

Li, Hsuan-De, and 李宣德. "Fabrication of multilayer and monolayer graphene devices." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/74261588473944922097.

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碩士<br>中原大學<br>物理研究所<br>98<br>Graphene has emerged as an exciting material because of the novel properties associated with its special two-dimensional structure. Due to its special band structure, graphene has observed an abnormal half-integer quantum Hall effect. We would like to fabricated the graphite sheets (multilayer or monolayer graphene) and than to made devices for studying quantum transport. 　　We have made graphene by two methods, micromechanical cleavage and longitudinal unzipping of carbon nanotubes. The first method is the cleavage of the graphite with the tape to produce the grap

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27

Hegde, Rohit. "Interactions and quantum hall effects in graphene multilayers." 2013. http://hdl.handle.net/2152/23100.

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In a strong magnetic field, the psuedospin chirality of bilayer graphene’s low energy bands results in degenerate, zero energy n=0 and n=1 Landau or- bital states. In this thesis, we find that in addition to endowing states with energetic broadness disorder strongly mixes the zero energy orbitals of the lowest Landau level. We study the dependence of mixing and conductivity on inter-layer bias. Quantum Hall ferromagnetic states emerge when electronic interactions are included at the mean-field level. We study the character of ground states and quasiparticle excitations in the context of orbita

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28

Chien, Yuan-hung, and 錢遠鴻. "The optical and electrical properties of multilayer graphene." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/89423513136455328377.

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碩士<br>國立中央大學<br>物理研究所<br>100<br>In this thesis, high quality monolayer graphene were grown on Cu foil by chemical vapor deposition, and we manufacture multilayer graphene by stacking monolayer graphene. The propose of stacking multilayer graphene is to obtain optimum condition both in optical and electrical properties. According to the results of Raman spectrum measurement, the full width at half maximum of G band and 2D band peaks are both smaller than 40 cm-1 and the ratio of 2D/G is larger than 1.5, which means the transferred graphene is monolayer. The average sheet resistivity of tran

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29

Yu, Tzu-Hui, and 游慈卉. "Hydrogenation on multilayer graphene studied by miero-Raman spectroscopy." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81915069725830435426.

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Rocha, Helena Cristina Lopes. "Graphene nanoribbons for multilayer films based on natural polymers." Master's thesis, 2014. http://hdl.handle.net/1822/64962.

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Dissertação de mestrado integrado em Engenharia de Materiais<br>Biomedical applications and more precisely, implantable devices or scaffolds for regenerative medicine, typically require the use of biodegradable and/or biocompatible materials with adequate mechanical properties and, depending on the specific application, specific electric properties. In this work, such properties were attempted by combining natural polymers, to provide biodegradability and biocompatibility, and graphene, to provide adequate mechanical and electric properties. Four different types of graphene were produced

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31

Chung, Wen-Liang, and 鍾文梁. "The growth of multilayer graphene through chemical vapor deposition." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/x88k3s.

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碩士<br>國立中央大學<br>物理學系<br>105<br>As the first identified 2-dimentional material, the unique properties of graphene, such as the ultrahigh electron mobility, had attracted lots of researchers in the related fields. However, the lack of large area and high quality graphene limited the application of graphene-based devices. In the past 10 years, a lot of graphene fabrication methods had been developed. Among these methods, CVD was seen as one of the most promising ways for graphene fabrication. CVD graphene is based on the need of large area continuous graphene films. However, the quality of CVD gr

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Chou, Chin-Perng, and 周繼鵬. "Micromachining of Multilayer Graphene Micro-Capacitor Using Picosecond Laser." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9svmnc.

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碩士<br>中原大學<br>機械工程研究所<br>106<br>Due to the outstanding mechanical stiffness, electrical conductivity, and flexibility, graphene is now widely used in transistor, detector, touch sensor, and supercapacitor. The continuous growth of wearable devices market such as smart phone and tablet, the development of touch sensor has attracted many interests in order to minimize size and reduced fabrication cost. In the present study, graphene ink was coated on glass substrate using spin coating technique to formed homogeneous thickness of multilayer graphene with approximately 20 μm. The process with an

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33

Zhen-XunWong and 黃振訓. "Synthesis and Properties of Multilayer Graphene Coated with Sn/SnO2." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2aqxtk.

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Chiu, Man-Li, and 邱曼麗. "Ultrafast Dynamics in Multilayer Graphene Studied by Femtosecond Pump-Probe Spectroscopy." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49437613428430188002.

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碩士<br>國立交通大學<br>電子物理系所<br>100<br>In this thesis, we study ultrafast dynamics of chemical vapor deposition multilayer graphene by the femtosecond spectroscopy. Graphene film which growth by chemical vapor deposition were transferred to the sapphire substrate. By repeating above steps we can obtain the multilayer graphene samples. Graphene could be applied to electro-optical devices potentially due to its extraordinary optical and electrical properties. Understanding the carriers cooling, carrier-carrier scattering and carrier dynamics of graphene are important topics. Using ultrafast optical pu

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35

Kuo, Chia-Hsuan, and 郭家瑄. "Electrodynamics properties of multilayer graphene studied by Terahertz Time Domain Spectroscopy." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/36768018291518121568.

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碩士<br>國立交通大學<br>電子物理系所<br>100<br>We use Terahertz-time domain spectroscopy (THz-TDS) to characterize electromagnetic property of graphene thin film. In particular, the extraordinary properties have made monolayer graphene a promising material for high speed electronic device and high sensitive electro-optical device. Graphene synthesized be CVD has been widely study because of not only the large scale area but also high uniformity of graphene. We then perform the THz-TDS to study the electromagnetic property of multilayer graphene via different transfer material in CVD technique. The Drude fr

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36

Shih-Hsuan, Hung, and 洪世軒. "Epitaxial growth of multilayer graphene on 15R-SiC by simulated annealing technique." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/44876187564473166240.

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碩士<br>國立中央大學<br>物理學系<br>103<br>The epitaxial graphene is grown for the first time on 15R-SiC(0001) substrate by employing a critically evaluated empirical potential, namely, the Tersoff-type Erhart- Albe potential [41] in the simulated annealing method. The factors that affect the growth process were studied. Three layers of graphene were successfully grown and they were examined by the calculated binding energy per atom, average bond-length, inter-layer and graphene-substrate separation distances, roughness parameter and graphene area coverage. We find that the threshold temperature at which

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37

Chakraborty, Biswanath. "Raman Spectroscopy Of Graphene And Graphene Analogue MoS2 Transistors." Thesis, 2012. https://etd.iisc.ac.in/handle/2005/2539.

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The thesis presents experimental studies of device characteristics and vibrational properties of atomic layer thin graphene and molybdenum disulphide (MoS2). We carried out Raman spectroscopic studies on field effect transistors (FET) fabricated from these materials to investigate the phonons renormalized by carrier doping thus giving quantitative information on electron-phonon coupling. Below, we furnish a synoptic presentation of our work on these systems. Chapter1: Introduction Chapter1, presents a detailed introduction of the systems studied in this the¬sis, namely single layer graphen

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38

Chakraborty, Biswanath. "Raman Spectroscopy Of Graphene And Graphene Analogue MoS2 Transistors." Thesis, 2012. http://hdl.handle.net/2005/2539.

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The thesis presents experimental studies of device characteristics and vibrational properties of atomic layer thin graphene and molybdenum disulphide (MoS2). We carried out Raman spectroscopic studies on field effect transistors (FET) fabricated from these materials to investigate the phonons renormalized by carrier doping thus giving quantitative information on electron-phonon coupling. Below, we furnish a synoptic presentation of our work on these systems. Chapter1: Introduction Chapter1, presents a detailed introduction of the systems studied in this the¬sis, namely single layer graphene

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Yang, You-Hao. "Processing and Gas Barrier Behavior of Multilayer Thin Nanocomposite Films." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11685.

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Thin films with the ability to impart oxygen and other types of gas barrier are crucial to commercial packaging applications. Commodity polymers, such as polyethylene (PE), polycarbonate (PC) and polyethylene terephthalate (PET), have insufficient barrier for goods requiring long shelf life. Current gas barrier technologies like plasma-enhanced vapor deposition (PECVD) often create high barrier metal oxide films, which are prone to cracking when flexed. Bulk composites composed of polymer and impermeable nanoparticles show improved barrier, but particle aggregation limits their practical utili

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Zbeda, Salma Gumaa Amar. "Multilayer graphene modified metal film electrodes for the determination of trace metals by anodic stripping voltammetry." 2013. http://hdl.handle.net/11394/3802.

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Magister Scientiae - MSc<br>In this study multilayer graphene nanosheets was synthesize by oxidizing graphite to graphene oxide using H2SO4 and KMnO4 followed by reduction of graphene oxide to graphene using NaBH4. The graphene nanosheets were characterized by Fourier Transform Infrared (FTIR) and Raman spectroscopy, high resolution transmission electron microscopy (HRTEM), Scanning electron microscopy (SEM) and X-ray diffraction (XRD). HRTEM images showed that the multilayer graphene were obtained. The graphene was immobilized directly onto a glassy carbon electrode using the drop coating tec

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張真誠. "Fabrication and Functional Properties of Waterborne Polyurethane Composite Film Added with Multilayer Graphene Nanosheets." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/33577316562411442645.

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Tseng, Po-Ying, and 曾柏穎. "Characterizing the mechanical and thermal properties of multilayer graphene nanocomposites using molecular dynamics simulation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9332xn.

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碩士<br>國立交通大學<br>機械工程系所<br>106<br>The study aims to characterize the mechanical and thermal properties of multilayer graphene nanocomposites using molecular dynamics (MD) simulation. The effects of surface functionalized and wavy graphene on nanocomposites were also investigated. The results indicated that the increase in the number of graphene layers will reduce the Young's modulus of the nanocomposite, which is mainly derived from the low load transfer efficiency of the graphene inner layer. The pullout simulation also shows that the interfacial shear stress of the multilayer graphene is lowe

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Jie-WeiGuo and 郭傑維. "The electronic properties of AB-stacked multilayer graphenes in an electric field." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/95553985505335877696.

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碩士<br>國立成功大學<br>物理學系碩博士班<br>100<br>I use the tight-binding method to study the effect of AB-stacked graphite in the electric field. We found that the energy band will produce the energy gap in few-layers, and overlap in multi-layers. The overlap will become wider with the increased number of layers. The density of states of multi-layer graphene is very different compared to few-layers, the energy band will spread up and the density of states will become larger than few-layers. We also analyzed the the density of states on the Fermi energy with the changes of the electric field and the number o

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YangChi-Chang and 楊啟昌. "The study on thermoelectric property of Silicon-Rich oxide/Silicon oxide and Si/Graphene multilayers." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/35654943803744544248.

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碩士<br>國立成功大學<br>電機工程學系<br>104<br>In our research, the multilayers of silicon rich oxide/silicon dioxide and silicon/graphene were synthesized by reactive magnetron sputtering. The multilayers act as phonon block for the silicon substrate. Our objective is the reduction of thermal conductivity with preservation of electrical conductivity and seebeck coefficient. The structural and physical properties of all multilayers were investigated by TEM, XRD, XPS, TDTR and Harman method. The thermal conductivity successfully drops to accessible range because of phonon scattering in each interface. The va

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CHANG, HSUN-HSIANG, and 張勛翔. "Optoelectronic Properties of Antimony Sulfide Single Layer/ Multilayer Graphene Composite Material by Chemical Bath Deposition." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/64972074662448528165.

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碩士<br>國立中正大學<br>光機電整合工程研究所<br>104<br>In this study, the surface hydrophobic property of the chemical vapor deposited (CVD) graphene was modified to hydrophilic property by using UV ozonation process. In order to enhance the visible reaction of graphene, antimony sulfide (Sb2S3) thin film was deposited onto graphene by chemical bath deposition (CBD). The quality of the single layer and multilayer graphene were compared in terms of defect, sheet resistance, carrier drift, and carrier concentration by using Raman spectra analysis and Hall measurement. Sb2S3 / single layer graphene and Sb2S3 / mul

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CHEN, CHIN-YU, and 陳錦煜. "Optoelectronic Properties of Multilayer Stacking Cadmium Sulfide-Graphene Composite Material by Successive Ionic Layer Adsorption and Reaction." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/ct43bq.

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碩士<br>國立中正大學<br>光機電整合工程研究所<br>104<br>Graphene is a suitable material in the application of photodetectors for its high carrier mobility and broad wavelength absorption ability. However, its optical transmittance and the carrier recombination speed is extremely high after illumination, resulting in poor photoresponse. In this study, the visible-light photoresponse of graphene is enhanced by growing cadmium sulfide (CdS) through Successive Ionic Layer Adsorption and Reaction (SILAR) method on graphene. Multilayer stacking CdS/graphene and non-stacking CdS/graphene devices were fabricated and the

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CHEN, YU-TSUNG, and 陳昱璁. "Optoelectronic Properties of Multilayer Stacking Cadmium Sulfide-Graphene Composite Material by Successive Ionic Layer Adsorption and Reaction." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/a63jk3.

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碩士<br>國立中正大學<br>光機電整合工程研究所<br>107<br>Graphene is a suitable material in the application of photodetectors for its high carrier mobility and broad wavelength absorption ability. However, its optical transmittance and the carrier recombination speed is extremely high after illumination, resulting in poor photoresponse. In this study, the visible-light photoresponse of graphene is enhanced by growing Antimony sulfide through chemical bath deposition method on graphene. Previous experiments have found that strontium sulfide/graphene elements deposited for 6 hours have the best optical responsivene

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Sham, Alison Yue Wan. "The Adsorption of Surfactant Exfoliated Graphene at Interfaces." Phd thesis, 2017. http://hdl.handle.net/1885/124620.

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Graphene, a single layer of highly ordered carbon atoms, has captured tremendous interest within academia and industry recently. This is due to its unique, two-dimensional structure which yields a combination of outstanding properties ideal for enhancing the performance of existing applications and enabling future disruptive technologies. Nevertheless, the production of graphene particles devoid of structural defects that can be easily integrated and used in products and applications on a commercial scale has proved exceptionally challenging. The first

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Silva, Rita Isabel Sousa e. "Influência do teor de grafeno nas propriedades do polipropileno isotático." Master's thesis, 2017. http://hdl.handle.net/10316/83425.

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Dissertação de Mestrado Integrado em Engenharia do Ambiente apresentada à Faculdade de Ciências e Tecnologia<br>ResumoEste trabalho de investigação tem como principal objetivo contribuir para a produção e caracterização de nanocompósitos constituídos por polipropileno isotático e grafeno multicamada (iPP/MLG). O grafeno e seus derivados apresentam inúmeras aplicações nas mais variadas áreas, em particular na engenharia. Grande parte dos resíduos provenientes da indústria dos moldes são elétrodos de grafite, e é a partir deles que se pretende futuramente obter derivados de carbono, com caraterí

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WANH, YING-Hsiang, and 王盈翔. "Enhancement of device performance and carrier transport in InGaN/GaN multiple-quantum well light emitting diodes with multilayer graphene transparent electrodes on the p-layer and on the sapphire substrate." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/utvzf6.

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