Browsing by Subject "Graphene"
Now showing items 21-40 of 144
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Controlling mid-infrared plasmons in graphene nanostructures through post-fabrication chemical doping
(2021-07-01)
Article
Open AccessEngineering the doping level in graphene nanostructures to yield controlled and intense localized surface plasmon resonance (LSPR) is fundamental for their practical use in applications such as molecular sensing for point ... -
CVD graphene-FET based cascode circuits: a design exploration and fabrication towards intrinsic gain enhancement
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Conference report
Restricted access - publisher's policyThis paper presents the design exploration of a basic cascode circuit (CAS) targeted to increase the intrinsic gain A# of a graphene field-effect-transistor (GFET) by decreasing its output conductance go. First, the ... -
Device Nanofabrication and Quantum Electronic Transport in Twisted van der Waals Heterostructures
(Universitat Politècnica de Catalunya, 2019-05-30)
Bachelor thesis
Open Access
Covenantee: Massachusetts Institute of TechnologyIn this project I will learn how to fabricate twisted van der Waals heterostructures using mechanical exfoliation and pick up & transfer methods. I will also learn how to perform device nanofabrication using modern electron ... -
Digital metasurface based on graphene: An application to beam steering in terahertz plasmonic antennas
(2019-06-25)
Article
Open AccessMetasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful capabilities on manipulation of electromagnetic waves. Recent times have seen the emergence of a variety ... -
Direct growth of 2D and 3D graphene nano-structures over large glass substrates by tuning a sacrificial Cu-template layer
(IOP, 2017-03-28)
Article
Open AccessWe demonstrate direct growth of two-dimensional (2D) and three-dimensional (3D) graphene structures on glass substrates. By starting from catalytic copper nanoparticles of different densities and using chemical vapour ... -
Dispositivos optoelectrónicos con grafeno para comunicaciones ópticas: guías ópticas de silicio y grafeno
(Universitat Politècnica de Catalunya, 2017-05)
Bachelor thesis
Open Access -
Double-layer graphene for enhanced tunable infrared plasmonics
(Nature, 2017-06-02)
Article
Open AccessGraphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for ... -
Dry transfer of graphene to dielectrics and flexible substrates using polyimide as a transparent and stable intermediate layer
(IOP, 2018-04-30)
Article
Open AccessWe demonstrate the direct transfer of graphene from Cu foil to glass and flexible substrates such as PET, using polyimide (PI) mixed with an aminosilane (3-aminopropyltrimethoxysilane) or only PI, respectively, as intermediate ... -
Educational toolkit based on design methodologies to promote scientific knowledge transfer in secondary schools: a graphene-centered case study
(OmniaScience, 2020-04)
Article
Open AccessNanoscience and nanotechnology are two key areas in the development of new technologies. However, scientific advances in these fields are still far removed from the contents taught in schools. But what if basic concepts ... -
Effect of graphene oxide and carbon nanotubes on electrodeposition of polypyrrole films
(Universitat Politècnica de Catalunya, 2022-06-16)
Conference lecture
Open Access -
Effect of lattice defects on the transport properties of graphene nanoribbon
(2019)
Conference report
Restricted access - publisher's policyGraphene nanoribbons are the most emerging graphene structures for electronic applications. Here, we present our calculation results on the impact of lattice defects on the transport properties of these structures. Preliminary ... -
Effects of carbon nanotubes/graphene nanoplatelets hybrid systems on the structure and properties of polyetherimide-based foams
(2018-03-21)
Article
Open AccessFoams based on polyetherimide (PEI) with carbon nanotubes (CNT) and PEI with graphene nanoplatelets (GnP) combined with CNT were prepared by water vapor induced phase separation. Prior to foaming, variable amounts of only ... -
Effects of graphene concentration, relative density and cellular morphology on the thermal conductivity of polycarbonate–graphene nanocomposite foams
(2016-02)
Article
Open AccessThe thermal conductivity of polycarbonate–graphene nanocomposite foams was studied as a function of relative density, developed cellular structure and graphene concentration. Two types of supercritical CO2 foaming processes ... -
Effects of graphene nanoplatelets and cellular structure on the thermal conductivity of polysulfone nanocomposite foams
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-01)
Article
Open AccessPolysulfone (PSU) foams containing 0–10 wt% graphene nanoplatelets (GnP) were prepared using two foaming methods. Alongside the analysis of the cellular structure, their thermal conductivity was measured and analyzed. The ... -
Effects of graphene nanoplatelets on the morphology of polycarbonate-graphene composite foams prepared by supercritical carbon dioxide two-step foaming
(2015-05)
Article
Open AccessLow density polycarbonate foams containing different amounts of graphene nanoplatelets with variable cellular morphologies were prepared using a supercritical carbon dioxide two-step foaming process, which consisted of the ... -
El Grafeno. Parte II: procesos y viabilidad de su producción
(2015-07)
Article
Open AccessAnte el descubrimiento del grafeno, un material con propiedades de gran interés tecnológico, la industria busca optimizar sus mecanismos de producción con el objetivo de abordar un mercado para el cual se prevé un gran ... -
Elastic bending modulus of monolayer graphene
(2009-05)
Article
Open AccessAn analytic formula is derived for the elastic bending modulus of monolayer graphene based on an empirical potential for solid-state carbon atoms. Two physical origins are identified for the non-vanishing bending stiffness ... -
Electrical conduction behavior of high-performance microcellular nanocomposites made of graphene nanoplatelet-filled polysulfone
(2020-12-04)
Article
Open AccessGraphene nanoplatelet (GnP)-filled polysulfone (PSU) cellular nanocomposites, prepared by two different methods—namely, water vapor-induced phase separation (WVIPS) and supercritical CO2 dissolution (scCO2) foaming—were ... -
Electrical control of optical emitter relaxation pathways enabled by graphene
(Nature Publishing Group, 2015-01-19)
Article
Open AccessControlling the energy flow processes and the associated energy relaxation rates of a light emitter is of fundamental interest and has many applications in the fields of quantum optics, photovoltaics, photodetection, ... -
Electrical tunability ofterahertz nonlinearity in graphene
(Science, 2021-04-07)
Article
Open AccessGraphene is conceivably the most nonlinear optoelectronic material we know. Its nonlinear optical coefficients in the terahertz frequency range surpass those of other materials by many orders of magnitude. Here, we show ...
