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Chemical oxidation of multilayer graphene grown on silicon carbide yields films exhibiting reproducible characteristics, lateral uniformity, smoothness over large areas, and manageable chemical complexity, thereby opening opportunities to…

材料科学 · 物理学 2014-03-20 S. Zhou , S. Kim , E. Di Gennaro , Y. Hu , C. Gong , X. Lu , C. Berger , W. de Heer , E. Riedo , Y. J. Chabal , C. Aruta , A. Bongiorno

Hydrodynamic electron transport arises when carrier kinetics are dominated by interelectron collisions rather than the relaxation of momentum out of the electron system. In recent years, signatures of electron hydrodynamics have been…

Using density-functional calculations, we show that electron or hole doped graphene can strongly change the mobility of adsorbed atoms H and O. Interestingly, charge doping affects the diffusion of H and O in the opposite way, namely,…

计算物理 · 物理学 2016-08-04 Manh-Thuong Nguyen , Pham Nam Phong

Carbon nanomaterials continue to amaze scientists due to their exceptional physical properties. Recently there have been theoretical predictions and first reports on graphene multilayers, where, due to the rotation of the stacked layers,…

Carbon nanomaterials such as carbon nanotubes and graphene have proved to be efficient building blocks for active optoelectronic devices. Especially, the exotic properties of crystalline graphene, such as a linear/gapless energy dispersion,…

In this paper, we establish the existence of both compressive stress and charge transfer process in hydrothermally synthesized cobalt ferrite-graphene oxide (CoFe2O4/GO) nanocomposites. Transmission electron microscopy (TEM) results reveal…

介观与纳米尺度物理 · 物理学 2017-05-24 Amodini Mishra , Vikash Kumar Singh , Tanuja Mohanty

The data by Q.Yang et al suggest absence of "ultrafast flow" of solvent across graphene oxide (GO) membranes. The "ultrafast flow" is result of using unrealistic geometrical model with close packed hole-free micrometer sized GO flakes…

应用物理 · 物理学 2018-12-11 Alexandr Talyzin

Graphene photonics has emerged as a promising platform for providing desirable optical functionality. However, graphene's monolayer-scale thickness fundamentally restricts the available light matter interaction, posing a critical design…

光学 · 物理学 2017-05-11 PoHan Chang , Charles Lin , Amr S. Helmy

As a derivative of graphene, graphene oxide (GO) was initially developed by chemists to emulate some of the key properties of graphene, but it was soon recognized as a unique material in its own right, addressing an application space that…

光学 · 物理学 2023-03-08 David Moss

The production of large area interfaces and the use of scalable methods to build-up designed nanostructures generating advanced functional properties are of high interest for many materials science applications. Nevertheless, large area…

Deformations in graphene systems are central elements in the novel field of {\it straintronics}. Various strain geometries have been proposed to produce specific properties but their experimental realization has been limited. Because…

介观与纳米尺度物理 · 物理学 2016-09-20 R. Carrillo-Bastos , C. León , D. Faria , A. Latgé , Eva Y. Andrei , N. Sandler

Graphene monolayers supported on oxide substrates have been demonstrated with superior charge mobility and thermal transport for potential device applications. Morphological corrugation can strongly influence the transport properties of the…

介观与纳米尺度物理 · 物理学 2015-05-18 Zachary H. Aitken , Rui Huang

We probe the local inhomogeneities in the electronic properties of exfoliated graphene due to the presence of charged impurities in the SiO2 substrate using a combined scanning tunneling and electrostatic force microscope. Contact potential…

介观与纳米尺度物理 · 物理学 2012-02-21 Andres Castellanos-Gomez , Roel H. M. Smit , Nicolás Agraït , Gabino Rubio-Bollinger

One of the salient features of graphene is the very high carrier mobility that implies tremendous potential for use in electronic devices. Unfortunately, transport measurements find the expected high mobility only in freely suspended…

介观与纳米尺度物理 · 物理学 2015-06-04 Søren Ulstrup , Marco Bianchi , Richard Hatch , Dandan Guan , Alessandro Baraldi , Dario Alfè , Liv Hornekær , Philip Hofmann

We theoretically study the transport properties of both monolayer and bilayer graphene in the presence of electron-hole puddles induced by charged impurities which are invariably present in the graphene environment. We calculate the…

介观与纳米尺度物理 · 物理学 2011-09-28 Qiuzi Li , E. H. Hwang , S. Das Sarma

An efficient computational methodology is used to explore charge transport properties in chemically-modified (and randomly disordered) graphene-based materials. The Hamiltonians of various complex forms of graphene are constructed using…

介观与纳米尺度物理 · 物理学 2011-12-16 Nicolas Leconte , Aurélien Lherbier , François Varchon , Pablo Ordejon , Stephan Roche , Jean-Christophe Charlier

This study investigates the prospect of using reduced graphene oxide encapsulated between thin wood membranes as a composite filter for water filtration. Graphene oxide (GO) with a volume range of 0.2 to 0.5 mL was deposited on a 95 mm2…

Generating molecular graphs is crucial in drug design and discovery but remains challenging due to the complex interdependencies between nodes and edges. While diffusion models have demonstrated their potentiality in molecular graph design,…

机器学习 · 计算机科学 2024-11-11 Xiaoyang Hou , Tian Zhu , Milong Ren , Dongbo Bu , Xin Gao , Chunming Zhang , Shiwei Sun

Electronic conduction in conjugated polymers is of emerging technological interest for high-performance optoelectronic and thermoelectric devices. A completely new aspect and understanding of the conduction mechanism on conducting polymers…

材料科学 · 物理学 2015-08-18 Asli Ugur , Ferhat Katmis , Mingda Li , Lijun Wu , Yimei Zhu , Kripa K. Varanasi , Karen K. Gleason

As the thinnest conductive and elastic material, graphene is expected to play a crucial role in post-Moore era. Besides applications on electronic devices, graphene has shown great potential for nano-electromechanical systems. While…