Browsing Physics (Scholarly Publications) by Subject "graphene"
Now showing items 1-19 of 19
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Anomalous length dependence of the conductance of graphene nanoribbons with zigzag edges
(2013)Charge transport through two sets of symmetric graphene nanoribbons with zigzag shaped edges in a two-terminal device has been investigated, using density functional theory combined with the non-equilibrium Green's function ... -
Dynamic RKKY interaction in graphene
(2012)The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, based on which the energetically favorable alignment ... -
Dynamical tuning of energy transfer efficiency on a graphene monolayer
(2015)In this contribution we present a theoretical investigation of the energy transfer efficiency between quantum systems placed in proximity of a monolayer of conducting graphene. We calculate the spontaneous emission rate ... -
Electronic structure of graphene beyond the linear dispersion regime
(2011)Among the many interesting features displayed by graphene, one of the most attractive is the simplicity with which its electronic structure can be described. The study of its physical properties is significantly simplified ... -
High Performance Na-O2 Batteries and Printed Microsupercapacitors Based on Water-Processable, Biomolecule-Assisted Anodic Graphene
(2020)Integrated approaches that expedite the production and processing of graphene into useful structures and devices, particularly through simple and environmentally friendly strategies, are highly desirable in the efforts to ... -
High-Concentration Solvent Exfoliation of Graphene.
(Wiley-Blackwell, 2010)We demonstrate a method to prepare graphene dispersions at high concentrations, up to 1.2 mg/ml, with yields of up to 4wt% monolayers. This process relies on low-power sonication for long times, up to 460 hours. TEM shows ... -
Impurity invisibility in graphene: Symmetry guidelines for the design of efficient sensors
(2016)Renowned for its sensitivity to detect the presence of numerous substances, graphene is an excellent chemical sensor. Unfortunately, which general features a dopant must have in order to enter the list of substances ... -
Indirect Exchange and RKKY Interactions in Magnetically-Doped Graphene
(2013)Magnetically-doped graphene systems are potential candidates for application in future spintronic devices. A key step is to understand the pairwise interactions between magnetic impurities embedded in graphene that are ... -
Large magnetoresistance in few layer graphene stacks with current perpendicular to plane geometry
(2012)Large magnetoresistance (MR) effect of few layers graphene between two non-magnetic metal electrodes with current perpendicular to graphene plane was studied. A non-saturation and anisotropic MR with the value over 60% at ... -
Lateral Size Selection of Surfactant-Stabilised Graphene Flakes using Size Exclusion Chromatography
(2012)Aqueous dispersions of graphene, stabilised by a surfactant, have been separated according to lateral flake size using size exclusion chromatography. Transition electron microscopy was used to characterise the flake size ... -
Liquid exfoliation of defect-free graphene
(2013)Due to its unprecedented physical properties, graphene has generated huge interest over the last 7 years. Graphene is generally fabricated in one of two ways: as very high quality sheets produced in limited quantities by ... -
Magnetization profile of magnetic impurities in graphene nanoribbons
(2011)The magnetic properties of graphene-related materials, and in particular, the spin-polarized edge states predicted for pristine graphene nanoribbons (GNRs) with certain edge geometries have received much attention recently ... -
Origami-based spintronics in graphene
(2013)We show that periodically folded graphene sheets with enhanced spin-orbit interaction due to curvature effects can carry spin-polarized currents and have gaps in the electronic spectrum in the presence of weak magnetic ... -
RKKY interaction between adsorbed magnetic impurities in graphene: symmetry and strain effects
(2013)The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, with the aim of determining the most energetically ... -
Strain-induced modulation of magnetic interactions in graphene
(2012)The ease with which the physical properties of graphene can be tuned suggests a wide range of possible applications. Recently, strain engineering of these properties has been of particular interest. Possible spintronic ... -
Sublattice asymmetry of impurity doping in graphene: A review.
(2014)In this review we highlight recent theoretical and experimental work on sublattice asymmetric doping of impurities in graphene, with a focus on substitutional nitrogen dopants. It is well known that one current limitation ... -
Tunable and long-range energy transfer efficiency through a graphene nanodisk
(2016)In this paper, we present a theoretical investigation of the energy transfer efficiency between a pair of quantum emitters placed in proximity to a conducting graphene nanodisk. The energy transfer efficiency quantifies ... -
Ultraviolet irradiation controlled memory effect in graphene field effect transistors
(Small, 2013)Sensitivity of graphene to its surroundings including adsorbates, trapped charges on the substrate, and photons may open an avenue for photon-controlled graphene memory devices via control of the charge transfer process. ... -
Variable range of the RKKY interaction in edged graphene
(2014)The indirect exchange interaction is one of the key factors in determining the overall alignment of magnetic impurities embedded in metallic host materials. In this work we examine the range of this interaction in ...