نتایج جستجو برای: annular graphene sheet

تعداد نتایج: 98654  

Journal: :Journal of the American Chemical Society 2007
Wei-Qiao Deng Yuki Matsuda William A Goddard

Since their discovery in 1991, carbon nanotubes have attracted much attention due to their unique electric, mechanical, and chemical properties.1-5 Numerous breakthroughs have led to practical fabrication of carbon nanotube electronics devices, such as transistors,6 interconnects,7 spintronics,8 and sensors. In addition, exfoliated or single graphene sheets show promise as an alternative materi...

Journal: :ACS nano 2013
Sang-Hoon Bae Orhan Kahya Bhupendra K Sharma Junggou Kwon Hyoung J Cho Barbaros Özyilmaz Jong-Hyun Ahn

A flexible, transparent acoustic actuator and nanogenerator based on graphene/P(VDF-TrFE)/graphene multilayer film is demonstrated. P(VDF-TrFE) is used as an effective doping layer for graphene and contributes significantly to decreasing the sheet resistance of graphene to 188 ohm/sq. The potentiality of graphene/P(VDF-TrFE)/graphene multilayer film is realized in fabricating transparent, flexi...

2014
Michael Andersson

The isolation of the two-dimensional material graphene, a single hexagonal sheet of carbon atoms, is believed to trigger a revolution in electronics. Theory predicts unprecedented carrier velocities in ideal graphene, from which ultrahigh speed graphene field effect transistors (GFETs) are envisioned. In this thesis, the prospects of GFETs for microwave receivers are investigated with the empha...

Darvish Ganji, Masoud, Farshad, Sara,

Background: In recent years, the unique physical and chemical properties of carbon nanostructures has led to many advancements in various fields, including chemistry and pharmaceuticals. Graphene is one of the carbon nanostructures which have attracted significant attention from researchers in adsorption and release of various drugs. Due to the high surface area of graphene, it can be used as a...

Journal: :Nano letters 2009
J Zhou Q Wang Q Sun X S Chen Y Kawazoe P Jena

Single layer of graphite (graphene) was predicted and later experimentally confirmed to undergo metal-semiconductor transition when fully hydrogenated (graphane). Using density functional theory we show that when half of the hydrogen in this graphane sheet is removed, the resulting semihydrogenated graphene (which we refer to as graphone) becomes a ferromagnetic semiconductor with a small indir...

2010
Brian Shevitski

Graphene was discovered in 2004 and has since sparked much interest in the field of condensed matter physics. Graphene is an atomically thin sheet of carbon arranged in a two dimensional honeycomb crystal. The MerminWagner Theorem predicts that a perfect crystal can not exist in two dimensional space, so it was surprising when graphene was first observed[1]. The existence of graphene has since ...

2015
XiaoYi Liu HengAn Wu

It is of great significance to understand the underlying mechanism of buckling-driven wrinkles in graphene monolayer due to its applications in nanoelectromechanical systems (NEMS). In previous macroscopic studies based on continuum theory, the chirality-dependent buckling in graphene monolayer is considered as neglectable. However, we found that the growth of buckling-driven wrinkles in graphe...

Journal: :Physical review letters 2012
Dmitry Solenov Kirill A Velizhanin

Chemical functionalization of graphene holds promise for various applications ranging from nanoelectronics to catalysis, drug delivery, and nanoassembly. In many applications it is important to be able to transport adsorbates on graphene in real time. We propose to use electromigration to drive the adsorbate transport across the graphene sheet. To assess the efficiency of electromigration, we d...

2014
Rakesh Kumar Bodh R Mehta Mehar Bhatnagar Ravi S Silika Mahapatra Saji Salkalachen Pratha Jhawar

This work presents an experimental and finite difference time domain (FDTD) simulation-based study on the application of graphene as a transparent conducting layer on a planar and untextured crystalline p-n silicon solar cell. A high-quality monolayer graphene with 97% transparency and 350 Ω/□ sheet resistance grown by atmospheric pressure chemical vapor deposition method was transferred onto p...

2017
Marriatyi Morsin

Received Mar 10, 2017 Revised May 5, 2017 Accepted May 26, 2017 Graphene is a promising new material for the construction of graphene devices because of its surface modification can be tuned the band gap. In this paper, the electronic and transport characteristics of defected graphene device are investigated. Both the electronic and transport characteristics are simulated using density function...

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