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Dissertations / Theses on the topic 'Nanostructure - Graphene'

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Published: 7 September 2023

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1

France-Lanord, Arthur. "Transport électronique et thermique dans des nanostructures." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS566/document.

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La miniaturisation continue des composants électroniques rend indispensable la connaissance des mécanismes de transport à l’échelle nanométrique. Alors que les processus simples de conduction dans les matériaux homogènes sont bien assimilés, la compréhension du transport à l’échelle nanométrique dans les systèmes hétérogènes reste à améliorer. Par exemple, le couplage entre courant, résistance et flux de chaleur dans des nanostructures doit être clarifié. Dans ce contexte, le sujet de thèse est centré autour du développement et de l’application de méthodes de calcul avancées pour la prédiction
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2

Celis, Retana Arlensiú Eréndira. "Gap en graphène sur des surfaces nanostructurées de SiC et des surfaces vicinales de métaux nobles." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS417/document.

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L'électronique basée sur le graphène fait face à un verrou technologique, qui est l'absence d'une bande interdite (gap) permettant une commutation entre les états logiques allumé et éteint. Les nano-rubans de graphène rendent possible l'obtention de ce gap mais il est difficile de produire de tels rubans avec une largeur précise à l'échelle atomique et des bords bien ordonnés. Le confinement électronique est une façon élégante d'ouvrir un gap et peut en principe être réglé en ajustant la largeur des nano-rubans. Cette thèse est consacrée à la compréhension de l'ouverture du gap par nano-struct
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3

Chernozatonskii, L. A., and V. A. Demin. "Nanotube Connections in Bilayer Graphene with Elongated Holes." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35460.

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Structures, stability and electronic properties of AA-stacking bigraphene with holes are studied using molecular mechanic and DFT method calculations. It has been shown the zig-zag edges of considered elon-gated holes lead to armchair sp2-nanotube-type connection between these two edges forming all sp2-structure. We consider similar periodic structures with (n,n) nanotubes formed among elongated holes and connected with bigraphene fragments, which edges are also closed edges. The stability and electronic prop-erties of these structures are investigated. Band structures of considered materials
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4

Das, Santanu. "Carbon Nanostructure Based Electrodes for High Efficiency Dye Sensitize Solar Cell." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/678.

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Synthesis and functionalization of large-area graphene and its structural, electrical and electrochemical properties has been investigated. First, the graphene films, grown by thermal chemical vapor deposition (CVD), contain three to five atomic layers of graphene, as confirmed by Raman spectroscopy and high-resolution transmission electron microscopy. Furthermore, the graphene film is treated with CF4 reactive-ion plasma to dope fluorine ions into graphene lattice as confirmed by X-ray photoelectron spectroscopy (XPS) and UV-photoemission spectroscopy (UPS). Electrochemical characterization r
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5

Rhoads, Daniel Joseph. "A Mathematical Model of Graphene Nanostructures." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1438978423.

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6

Federspiel, Francois. "Etude optique du transfert d'énergie entre une nanostructure semiconductrice unique et un feuillet de graphène." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAE015/document.

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Mes travaux de thèse portent sur l’interaction de type FRET (tranfert d’énergie résonant de Förster) entre une nanostructure semiconductrice colloïdale individuelle et le graphène. La première partie concerne l’établissement de la théorie du FRET et ce pour plusieurs types de nanostructures. Vient ensuite la partie expérimentale, à commencer par le montage optique ainsi que les méthodes d’analyse, tant pour la spectroscopie que pour la photoluminescence. Par la suite, nous décrivons les résultats obtenus pour divers types de nanocristaux sphériques en interaction directe avec le graphène (incl
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7

CURCIO, DAVIDE. "Growth and Properties of Graphene-Based Materials." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908114.

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In this thesis, I have focused on graphene-based nanostructures as a versatile means of manipulating the electronic properties of graphene, while working with objects perfect at the atomic level. This is the nanotechnological approach, where we exploit the infinite possibilities of making small things with new materials. For these reasons, I concentrated my research efforts to graphene-based nanomaterials, because graphene is one of the most exciting materials we have to date, and because manipulation of surfaces at the nano-level is what allows us to make new materials today. In this thesis,
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8

Seo, Michael. "Plasma-assisted nanofabrication of vertical graphene- and silicon-based nanomaterials and their applications." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12285.

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Scarcity of physical resources, increasing concerns for safety and hazardous waste disposal which affects the environment drove the current nanoscience research to focus on developing low-cost, green and environmentally friendly method of obtaining nanomaterials. Yet, developing such smart and innovative processes is at premature stage. Over a few decades, many nanomaterials have been found and investigated. Amongst many nanomaterials, carbon and silicon nanomaterials attracted immense attention due to their abundance, low cost, unique and tunable properties which are promising for many applic
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9

Kim, Junseok. "Improved Properties of Poly (Lactic Acid) with Incorporation of Carbon Hybrid Nanostructure." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81415.

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Poly(lactic acid) is biodegradable polymer derived from renewable resources and non-toxic, which has become most interested polymer to substitute petroleum-based polymer. However, it has low glass transition temperature and poor gas barrier properties to restrict the application on hot contents packaging and long-term food packaging. The objectives of this research are: (a) to reduce coagulation of graphene oxide/single-walled carbon nanotube (GOCNT) nanocomposite in poly(lactic acid) matrix and (b) to improve mechanical strength and oxygen barrier property, which extend the application of pol
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10

Geng, Yan. "Preparation and characterization of graphite nanoplatelet, graphene and graphene-polymer nanocomposites /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MECH%202009%20GENG.

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11

Garcia, Ana Maria Valencia. "Estudo ab initio de nanoestruturas de grafeno: defeitos intrínsecos e interação com água." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-21112017-170853/.

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Neste trabalho utilizamos métodos computacionais ab initio, baseados na Teoria do Funcional da Densidade (DFT), para simular em nível atomístico propriedades estruturais, eletrônicas e magnéticas de nanoestruturas de grafeno. Estudamos nanoflocos de grafeno (GNFs) em estado pristino e GNFs com defeitos intrínsecos (monovacância, divacância e Stone-Wales). Escolhemos GNFs com diferentes terminações e formas, e estudamos também empilhamentos duplos - biflocos - em diferentes composições. Empregamos dois enfoques diferentes de DFT, a aproximação de gradiente generalizado simples no nível teórico
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12

Li, Yanguang. "Nanostructured Materials for Energy Applications." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275610758.

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13

Poole, Timothy. "Acoustoelectric properties of graphene and graphene nanostructures." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29838.

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The acoustoelectric effect in graphene and graphene nanoribbons (GNRs) on lithium niobate surface acoustic wave (SAW) devices was studied experimentally. Monolayer graphene produced by chemical vapour deposition was transferred to the SAW devices. The photoresponse of the acoustoelectric current (Iae) was characterised as a function of SAW frequency and intensity, and illumination wavelength (using 450 nm and 735 nm LEDs) and intensity. Under illumination, the measured Iae increased by more than the measured decrease in conductivity, while retaining a linear dependence on SAW intensity. The la
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14

Vieitas, de Amaral Dias Ana Inês. "Plasma based assembly and engineering of advanced carbon nanostructures." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2019/document.

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L’environnement réactif du plasma constitue un outil puissant dans la science des matériaux, permettant la création de matériaux innovatifs et l'amélioration de matériaux existants qui ne serait autrement pas possible.Le plasma fournit simultanément des fluxes de particules chargées, des molécules chimiquement actives, des radicaux, de la chaleur, des photons, qui peuvent fortement influencer les voies d'assemblage à différentes échelles temporelles et spatiales, y compris à l’échelle atomique.Dans cette thèse de doctorat, des méthodes tenant pour base des plasmas micro-ondes ont été utilisées
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15

Pijeat, Joffrey. "Anthracenylporphyrin based building blocks for the bottom-up fabrication of nitrogen-doped graphene nanostructures." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS346/document.

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La synthèse de graphène par approche « bottom-up » fait l’objet de nombreux travaux de recherche ayant pour but de contrôler les propriétés électroniques et optiques de ce matériau par la fabrication de nanostructures avec une précision atomique. D’autre part, le contrôle de dopant dans le graphène permettant d’en moduler les propriétés suscite un grand intérêt et dans ce contexte l’utilisation de porphyrines avec un taux d’azote contrôlé est attrayante. Par leurs ressemblances structurelles, les porphyrines π-étendues peuvent être considérées comme des nanoparticules de graphène dopées à l’az
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16

Chu, Hua-Wei. "Development of solution-processed methods for graphene synthesis and device fabrication." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44738.

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Various solution-processed methods have been employed in this work. For the synthesis of graphene, a chemical exfoliation method has been used to generate large graphene flakes in the solution phase. In addition, chemical or electro polymerization has been used for synthesizing polyanthracene, which tends to form graphene nanoribbon through cyclodehydrogenation. For the device fabrication, graphene oxide (GO) thin films were deposited from solution phase on the vapor-silanzed aminosilane surface to make semiconducting active layer or conducting electrodes. Gold nanoparticles (AuNPs) were selec
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17

Risley, Mason J. "Surfactant-assisted exfoliation and processing of graphite and graphene." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/48980.

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Surfactant assisted solution exfoliation of expanded graphite by means of sonication was carried out in an attempt to produce non-covalent charge functionality on the surface of graphene for the directed self assembly of graphene films on patterned substrates via electrostatic interactions. This thesis includes the results of experimental research associated with: 1) quantifying the effectiveness of various di-functionalized dithienothiophene surfactant small molecules, 2) further understanding the surface affinity and interaction mechanism between these surfactant molecules and the surface of
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18

Hong, Jeongmin. "Characteristics of graphitic films for carbon based magnetism and electronics." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957308731&SrchMode=2&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269014102&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 19, 2010). Includes bibliographical references. Also issued in print.
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19

Belchi, Raphaëlle. "Architectures à base de nanostructures de carbone et TiO₂pour le photovoltaïque." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS329/document.

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Le photovoltaïque est une énergie renouvelable pouvant aider à lutter contre le réchauffement climatique et l’épuisement des ressources fossiles utilisées pour la production d’énergie. La filière émergente à base de matériaux pérovskites (photovoltaïque de 3ème génération) est très prometteuse car elle utilise des matériaux abondants et faciles à mettre en œuvre (technologie bas-coût) et a montré de plus des rendements record compétitifs en peu de temps. Il reste cependant des verrous technologiques à lever afin de pouvoir développer cette technologie à grande échelle. L’un deux consiste à amé
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20

Song, Zhimin. "Fabrication and Characterization of Nanopatterned Epitaxial Graphene Films for Carbon Based Electronics." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13943.

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In this thesis, we show that planar graphene ribbons have properties similar to those of nanotubes. Both exhibit semiconducting or metallic properties depending on crystal orientation. The band gap varies approximately as the inverse of the ribbon width. Both can be doped and gated. Due to these similarities, the patterned graphene also has nanotube like transport properties, which include coherent transport, ballistic transport, and high current capabilities. In essential contrast to nanotubes, graphene ribbons can be rationally patterned using standard electron beam lithography methods; func
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21

Rodriguez-Nieva, Joaquin F. (Joaquin Francisco). "Novel electronic behaviors in graphene nanostructures." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107041.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 167-185).<br>Recently, it has been shown that graphene can be combined with a variety of nanoscale systems, such as other two-dimensional crystals, to form novel electronic nanostructures. These systems inherit the unique characteristics of graphene, such as high mobility, Berry phase, photoresponse mediated by hot carriers, and at the same time acquire new features due to nanoscale heterogenities. In this thesis, I explore t
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22

Hu, Tao. "Non-covalent functionalization of carbon nanostructures : a DFT study." Thesis, Toulouse, INSA, 2013. http://www.theses.fr/2013ISAT0011/document.

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Le dopage non covalent de nanostructures carbonées par transfert de charge depuis/vers des molécules donneuses ou acceptrices (EDA) ou bien par des molécules d’acide sulfurique H2SO4, est considéré comme potentiellement intéressant pour de nombreuses applications. Parmi celles-ci on peut citer: capteur chimique, transistor à effet de champ, et d’autre l'électronique. Cependant, d'un point de vue théorique, on en sait peu au sujet de ces processus de transfert de charge par électrons ou par trous.Dans un premier temps, nous nous sommes intéressés à l’interaction entre des molécules d’acide sulf
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23

Gao, Pengcheng. "Matériaux carbonés nanostructurés pour supercapacités électrochimiques." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20028/document.

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Différents matériaux carbonés nanostructurés ont été synthétisés et mis en oeuvre comme matériaux supercapacitifs à double couche électrochimique (EDLC) ou comme substrats de matériaux pseudocapacitifs avec pour objectif d'augmenter leur densité de puissance. Nous avons ainsi développé une méthode de synthèse simple et originale de carbures de silicium (SiC) qui procède par une réduction topotactique d'un composite silice/carbon par le magnésium. Du fait de la température de synthèse inférieure à 800°C, SiC résultant conserve la morphologie et/ou la structure poreuse du précurseur composite. P
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24

Förster, Georg Daniel. "Modélisation atomique de nanoparticules métalliques sur substrats carbonés et graphène épitaxié sur métaux." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10150/document.

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Les applications des nanoparticules métalliques nécessitent des assemblées monodisperses et stables sur un substrat tel que le graphène ou le graphite. Le graphène épitaxié sur métal (GEM) est étudié, car il facilite l'auto-organisation des adsorbats. La différence entre les mailles du graphène et du métal conduit à un effet de moiré contenant certaines régions favorables de l'adsorption. Ce travail est consacré surtout aux systèmes Ru-C et Pt-C où nous nous sommes intéressé au substrat du GEM nu, des agrégats y etant deposés et des agrégats métalliques sur graphite. Les potentiels d'ordre de
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25

Huppert, Simon. "Transport non-linéaire et génération Terahertz dans des systèmes bidimensionnels sous forte irradiation optique." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066217/document.

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Cette thèse traite de comportements non-linéaires dans deux types de systèmes bidimensionnels différents: les hétérostructures semiconductrices ainsi qu'un matériau monocouche, le graphène. Elle comporte deux axes principaux: l'étude de la quantification de Wannier-Stark dans les super-réseaux de puits quantiques biaisés électriquement, et la modélisation d'effets nouveaux pour la génération de rayonnement électromagnétique dans le domaine Terahertz. Dans les super-réseaux de puits quantiques soumis à une tension externe, le champ électrique induit un confinement bidimensionnel des porteurs de
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26

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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27

Poole, Christopher J. "Electronic and transport properties of graphene nanostructures." Thesis, Lancaster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.654742.

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28

MANGADLAO, JOEY DACULA. "Multifunctional Materials from Nanostructured Graphene and Derivatives." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1448279230.

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29

Zedan, Abdallah. "GRAPHENE-BASED SEMICONDUCTOR AND METALLIC NANOSTRUCTURED MATERIALS." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/457.

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Exciting periods of scientific research are often associated with discoveries of novel materials. Such period was brought about by the successful preparation of graphene which is a 2D allotrope of carbon with remarkable electronic, optical and mechanical properties. Functional graphene-based nanocomposites have great promise for applications in various fields such as energy conversion, opteoelectronics, solar cells, sensing, catalysis and biomedicine. Herein, microwave and laser-assisted synthetic approaches were developed for decorating graphene with various semiconductor, metallic or magneti
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30

Berrahal, Quentin. "Étude par STM de nanostructures métalliques dans le graphène : croissance, propriétés et défauts induits." Thesis, Université de Paris (2019-....), 2019. http://www.theses.fr/2019UNIP7030.

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Le graphène, premier cristal purement bidimensionnel à avoir été obtenu, possède des propriétés électroniques uniques grâce à sa structure de bande en « cône de Dirac ». Au-delà des modifications et du contrôle de ses propriétés intrinsèques, il est aujourd’hui crucial d’étudier ses interactions avec divers environnements afin de créer de nouvelles applications : fonctionnalisation par des molécules, utilisation en tant que substrat pour des molécules ou des atomes métalliques, création de défauts structuraux ou chimiques, élaboration de multicouches à l’aide d’autres matériaux quasi-bidimensi
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31

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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32

Espeland, Erlend. "Gold Nanostructures on Graphite." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22433.

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Gold nanoparticles supported on a graphite substrate are prepared by thermal evaporation, and subsequently studied by X-ray photoelectron spectroscopy (XPS), temperature programmed desorption (TPD) of carbon monoxide and scanning electron microscopy (SEM).Increasing the amount of gold deposited leads to a shift of the desorption peak to higher temperatures, and the gold particles become larger.Depositing approximately the same amount of gold at different evaporation ratios does not seem to affect the desorption.Triangularly shaped gold particles appeared at higher evaporation rates.This is tho
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33

Gong, Chuncheng. "Atomic structure and dynamics study of defects in graphene by aberration-corrected transmission electron microscope." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:53bd9a04-71ad-4da8-b982-cb45a005e791.

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Graphene has grabbed enormous research attention due to its multiple unique properties. These properties, however, can be strongly influenced by lattice imperfections. Aberration corrected transmission electron microscopy (AC-TEM) is one of the leading methods to image two-dimensional materials at the atomic level. This thesis addresses the issue of structure and dynamics characterization of dislocations and grain boundaries (GBs) in graphene with single atom sensitivity using the state-of-the-art AC-TEM in Department of Materials, University of Oxford. My first goal is to understand the inter
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34

Jean, Fabien. "Growth and structure of graphene on metal and growth of organized nanostructures on top." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAY097/document.

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Le graphène, une monocouche de graphite, est composé d'atomes de carbone avec une structure en nid d'abeilles. Ses propriétés exceptionnelles ont attiré un intérêt mondial, dont le Prix Nobel de Physique en 2010. Le graphène épitaxié sur métal à rapidement été identifié comme un moyen de production de graphène de haute qualité de taille métrique, et est le sujet d'intenses activités de recherche en sciences de surface pour caractériser ses propriétés. En outre, ces études concernent aussi des systèmes plus complexes avec pour base le graphène, par exemple les réseaux ordonnés de nanoparticules
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35

Mazaleyrat, Estelle. "Croissance, structure et propriétés électroniques du graphène épitaxié sur rhénium, vers une plateforme bidimensionnelle et supraconductrice." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAY079.

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La réalisation de structures hybrides à base de graphène, dans lesquelles le graphène est associé à d'autres matériaux, constitue une piste prometteuse pour l'étude de nombreux phénomènes. En particulier, il est possible de cette façon d'induire des propriétés dans le graphène via des effets de proximité. Ici, le système cible que nous avons considéré consiste en une plateforme de graphène quasi-flottant, au caractère supraconducteur induit, et qui est placée à proximité d'impuretés magnétiques. A la lecture d'articles théoriques parus récemment, il semble qu'un tel échantillon pourrait présen
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36

Droth, Matthias [Verfasser]. "Spins and Phonons in Graphene Nanostructures / Matthias Droth." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1081551984/34.

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37

Mayorov, Alexander. "Tunnelling and noise in GaAs and graphene nanostructures." Thesis, University of Exeter, 2008. http://hdl.handle.net/10036/46914.

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Experimental studies presented in this thesis have shown the first realisation of resonant tunnelling transport through two impurities in a vertical double-barrier tunnelling diode; have proved the chiral nature of charge carriers in graphene by studying ballistic transport through graphene $p$-$n$ junctions; have demonstrated significant differences of $1/f$ noise in graphene compared with conventional two-dimensional systems. Magnetic field parallel to the current has been used to investigate resonant tunnelling through a double impurity in a vertical double-barrier resonant tunnelling diode
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38

Gorbachev, Roman. "Fabrication and transport properties of graphene-based nanostructures." Thesis, University of Exeter, 2009. http://hdl.handle.net/10036/89275.

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In this work fabrication and studies of transistor structures based on an atomic sheet of graphite, graphene, are described. Since graphene technology is in its early stages, the development and optimisation of the fabrication process are very important. In this work the impact of various fabrication conditions on the quality of graphene devices is investigated, in particular the effects on the carrier mobility of the details of the mechanical exfoliation procedure, such as environmental conditions and humidity, source of graphite and wafer cleaning procedure. In addition, a comparison is made
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39

Wu, Ying. "Computational studies of graphene on nanostructured ionic substrates." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683543.

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This work studies graphene on nanostructured ionic substrates using density functional theory (DFT) and the density functional tight binding (DFTB). Flat ionic substrates can provide graphene with a mechanical support without compromising its electronic properties, while the nanostructures can modify the electron behaviour in graphene sheets and potentially create devices such as on-sheet junctions. Previous to the calculations, we extend the self-consistent charge DFTB method (SCC-DFTB) to a self-consistent charge and dipole DFTB scheme (SCCD-DFTB), which allows atomic dipoles to be considere
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Mishra, Shantanu, Thorsten G. Lohr, Carlo A. Pignedoli, et al. "Tailoring Bond Topologies in Open-Shell Graphene Nanostructures." ACS Publications, 2018. https://tud.qucosa.de/id/qucosa%3A36585.

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Polycyclic aromatic hydrocarbons exhibit a rich spectrum of physicochemical properties depending on the size and, more critically, on the edge and bond topologies. Among them, open-shell systems - molecules hosting unpaired electron densities - represent an important class of materials for organic electronic, spintronic, and optoelectronic devices, but remain challenging to synthesize in solution. We report the on-surface synthesis and scanning tunneling microscopy- and spectroscopybased study of two ultralow-gap open-shell molecules, namely peri-tetracene, a benzenoid graphene fragment with z
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Frizera, Borghi Fabricio. "Fabrication And Biological Applications Of Graphene-Based Nanostructures." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15657.

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Graphene received increasing attention for sensing and biomedical applications due to its properties. However, the current production methods are resource consuming, struggle to integrate these films into devices, and hardly produce graphene nanostructures (GN) that improve desired film properties like surface area and reactivity. This thesis aims to use a plasma-enhanced technique to produce GN and to explore their potential biological applications. The control of GN using the plasma-enhanced chemical vapour deposition (PECVD) was investigated. Growth parameters were related with the nanostru
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Mendes, Rafael Gregorio. "Synthesis, characterization and toxicological evaluation of carbon-based nanostructures." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-186839.

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The synthesis, characterization and biological evaluation of different graphene-based nanoparticles with potential biomedical applications are explored. The results presented within this work show that eukaryotic cells can respond differently not only to different types of nanoparticles, but also identify slight differences in the morphology of nanoparticles, such as size. This highlights the great importance of the synthesis and thorough characterization of nanoparticles in the design of effective nanoparticle platforms for biological applications. In order to test the influence of morphology
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43

Calizo, Irene Gonzales. "Raman nanometrology of graphene." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3359892.

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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 8, 2010). Includes bibliographical references (p. 59-64). Also issued in print.
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Faizy, Namarvar Omid. "Structure électronique et transport quantique dans les nanostructures de Graphène." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00870405.

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Le graphène est un matériau constitué d'une seule couche atomique de carbone et représente un sujet majeur de la physique de la matière condensée. Le graphène possède de nombreuses propriétés remarquables : structure électronique décrite par une equation de Dirac sans masse, forte mobilité électronique, effet Hall quantique anormal, résistance ,rigidité et conductivité thermique élevée. Cette these concerne la structure électronique et le transport dans le graphène. Nous considérons en particulier le cas des bicouches tournées de graphène. Ces systèmes ont été découverts en particulier dans le
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Solouki, Bonab Vahab. "Polyurethane (PU) Nanocomposites; Interplay of Composition, Morphology, and Properties." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1542634359353501.

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Milana, Silvia. "Light interaction with graphene, related materials and plasmonic nanostructures." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708643.

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Tahmassebi, Amirhessam. "Fluid Flow Through Carbon Nanotubes And Graphene Based Nanostructures." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1436545689.

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Dragomirova, Ralitsa L. "Spin-dependent shot noise in semiconductor and graphene nanostructures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 140 p, 2009. http://proquest.umi.com/pqdweb?did=1674099571&sid=2&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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DI, PIERRO ALESSANDRO. "Computational modeling of thermal interfaces in graphene based nanostructures." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2742543.

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Wang, Shu Jun. "Applications of graphene for transparent conductors and polymer nanocomposites /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MECH%202009%20WANGS.

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