نتایج جستجو برای: graphene nanoribbons

تعداد نتایج: 51339  

The structural and electronic properties of the hydrogenated porous graphene nanoribbons were studied by using density functional theory calculations. The results show that the hydrogenated porous graphene nanoribbons are energetically stable. The effects of ribbon type and ribbon width on the electronic properties of these nanoribbons were investigated. It was found that both armchair and zigz...

باقری, بهناز, فضیله, فرهاد,

The discovery of graphene and its remarkable electronic and magnetic properties has initiated great research interest in this material. Furthermore, there are many derivatives in these graphene related materials among which graphene nanoribbons and graphene nanofragments are candidates for future carbon-based nanoelectronics and spintronics. Theoretical studies have shown that magnetism can ari...

2011
M. Zubaer Hossain

Related Articles Excitation of discrete and continuous spectrum for a surface conductivity model of graphene J. Appl. Phys. 110, 114305 (2011) Abnormal electronic transport and negative differential resistance of graphene nanoribbons with defects Appl. Phys. Lett. 99, 192102 (2011) The effect of doping on the energetics and quantum conductance in graphene nanoribbons with a metallocene adsorbat...

2014
Yanbiao Chu Pierre Gautreau Cemal Basaran

Articles you may be interested in Quantum conductance of zigzag graphene oxide nanoribbons Chiral graphene nanoribbons: Objective molecular dynamics simulations and phase-transition modeling Phonon limited transport in graphene nanoribbon field effect transistors using full three dimensional quantum mechanical simulation

2009
Katsunori Wakabayashi Manfred Sigrist

We will present brief overview on the electronic and transport properties of graphene nanoribbons focusing on the effect of edge shapes and impurity scattering. The low-energy electronic states of graphene have two non-equivalent massless Dirac spectrum. The relative distance between these two Dirac points in the momentum space and edge states due to the existence of the zigzag type graphene ed...

Journal: :physical chemistry research 0
maliheh khoshgoftar maher ... nasser shahtahmassebi ... mahmood rezaee roknabadi ...

we study the coherent spin-polarized transport through a zigzag-edge graphene flake (zgf), using hubbard model in the nearest neighbor approximation within the framework of the green function’s technique and landauer formalism. the system considered consists of electrode/ (zgf)/electrode, in which the electrodes are chosen to be armchair nanoribbons. the study was performed for two types of ele...

2017
Yang Xie Zhijian Hu Wenhao Ding Hang Xie

In this paper we propose an analytical method to calculate the band structures of graphene-like nanoribbons of the armchair type with arbitrary line defects or uniaxial strains. The model is based on the tight-binding model and the standing wave assumption for the armchair nanoribbons. It gives accurate band results for large supercell systems. Within this method, we analyze different local sta...

2014
Aida Martín Javier Hernández-Ferrer Luis Vázquez María Teresa Martínez

This work describes a rationalization of the interactions between two fully characterized graphene nanoribbons (GNRs) and a set of significant target molecules. The GNRs were carefully synthesized by unzipping multi-walled carbon nanotubes (MWCNTs) to yield graphene oxide nanoribbons (GNRox) containing 44 wt.% oxygen. The GNRox were reduced to yield reduced graphene oxide nanoribbons (GNRred) c...

Journal: :Physical review letters 2008
Michael Wimmer Inanç Adagideli Savaş Berber David Tománek Klaus Richter

We investigate spin conductance in zigzag graphene nanoribbons and propose a spin injection mechanism based only on graphitic nanostructures. We find that nanoribbons with atomically straight, symmetric edges show zero spin conductance but nonzero spin Hall conductance. Only nanoribbons with asymmetrically shaped edges give rise to a finite spin conductance and can be used for spin injection in...

Journal: :Nano letters 2012
Iñigo Martin-Fernandez Debin Wang Yuegang Zhang

Graphene being a zero band gap material hinders the use of its intrinsic form for many applications requiring a moderate band gap, such as field effect transistors and optoelectronic devices. Here we demonstrate a scalable method based on chemical vapor deposition for the direct growth of well-registered graphene nanoribbons on SiO(2) substrates with precise control over their width, length, an...

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