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First-principles calculations based on density functional theory (DFT) have been employed to investigate the structural, electronic, and gas-sensing properties of pure, defected, and doped germanene nanosheets. Our calculations have…

材料科学 · 物理学 2017-07-13 Md Monirojjaman Monshi , Sadegh Mehdi Aghaei , Irene Calizo

Graphene nanoribbons (GNRs) based T junctions were designed and studied in this paper. These junctions were made up of shoulders (zigzag GNRs) joined with stems (armchair GNRs). We demonstrated the intrinsic transport properties and…

材料科学 · 物理学 2008-01-17 Fangping OuYang , Bing Huang , Zuanyi Li , Xiao jin , Hui Xu

The chapter combines analytical (statistical-thermodynamic and kinetic) with numerical (Kubo-Greenwood-formalism-based) approaches used to ascertain an influence of the configurations of point (impurities, vacancies) and line (grain…

介观与纳米尺度物理 · 物理学 2014-06-04 T. M. Radchenko , V. A. Tatarenko , I. Yu. Sagalianov , Yu. I. Prylutskyy

In this paper, we develop an analytical approach to predict the field-induced alignment of cantilevered graphene nanoribbons. This approach is validated through molecular simulations using a constitutive atomic electrostatic model. Our…

介观与纳米尺度物理 · 物理学 2009-09-04 Zhao Wang

Recently, two-dimensional nanostructures consisting of alternating graphene and boron nitride (BN) domains have been synthesized. These systems possess interesting electronic and mechanical properties, with potential applications in…

介观与纳米尺度物理 · 物理学 2015-06-16 Yan Li , Riccardo Mazzarello

The effect of graphene flakes on the strength of Ni-graphene composites is investigated using molecular dynamics simulation. Rather than introducing flakes as flat structures into the Ni matrix, as it is common in available studies, we…

材料科学 · 物理学 2021-08-05 Vardan Hoviki Vardanyan , Herbert M. Urbassek

The increasing demand for sustainable energy solutions necessitates advancements in hydrogen storage technologies. This study investigates the hydrogen adsorption characteristics of graphene and a (8,0) carbon nanotube (CNT) decorated with…

材料科学 · 物理学 2025-09-16 Thomas Leiner , David Holec

We report here the charge transport behavior in graphene nanojunctions in which graphene nanodots, with relatively long relaxation time, are interfaced with ferromagnetic electrodes. Subsequently we explore the effect of substitutional…

材料科学 · 物理学 2018-09-12 Subramani Amutha , Arijit Sen

The understanding of atomic adsorption on graphene is of high importance for many advanced technologies. Here we present a complete database of the atomic adsorption energies for the elements of the Periodic Table up to the atomic number 86…

We study the effects of the interaction between electrons and holes on the conductance G of quasi-one-dimensional graphene systems. We first consider as a benchmark the limit in which all interactions are negligible, recovering the…

介观与纳米尺度物理 · 物理学 2013-05-29 M. Bazzanella , P. Faccioli , E. Lipparini

Accumulative Roll Bonding(ARB) process was used to develop few-layer graphene nano platelets reinforced aluminum matrix (GNPs/Al) composite in the form of sheets. Annealed Al sheets were ARB processed up to 6 pass along with coating of…

应用物理 · 物理学 2018-07-03 Jitendar K Tiwari , Ajay Mandal , N Sathish , Venkat A N Ch , A K Srivastava

Methane, the primary constituent of natural gas, binds too weakly to nanostructured carbons to meet the targets set for on-board vehicular storage to be viable. We show, using density functional theory calculations, that replacing graphene…

材料科学 · 物理学 2015-10-01 Rajiv K. Chouhan , Kanchan Ulman , Shobhana Narasimhan

Prompted by recent reports on $\sqrt{3} \times \sqrt{3}$ graphene superlattices with intrinsic inter-valley interactions, we perform first-principles calculations to investigate the electronic properties of periodically nitrogen-doped…

介观与纳米尺度物理 · 物理学 2021-02-05 Fuming Xu , Zhizhou Yu , Zhirui Gong , Hao Jin

We investigated a suspended bilayer graphene where the bottom (top) layer is doped by boron (nitrogen) substitutional atoms by using Density Functional Theory (DFT) calculations. We found that at high dopant concentration (one B-N pair…

材料科学 · 物理学 2016-05-25 Daniele Giofré , Davide Ceresoli , Mario I. Trioni

Lateral heterostructures of two-dimensional materials may exhibit various intriguing emergent properties. Yet when specified to the orientationally aligned heterojunctions of zigzag graphene and hexagonal boron nitride (hBN) nanoribbons,…

介观与纳米尺度物理 · 物理学 2015-09-22 Jiang Zeng , Wei Chen , Ping Cui , Dong-Bo Zhang , Zhenyu Zhang

We report on a theoretical study of the effects of time-dependent fields on electronic transport through graphene nanoribbon devices. The Fabry-P\'{e}rot interference pattern is modified by an ac gating in a way that depends strongly on the…

介观与纳米尺度物理 · 物理学 2011-06-10 Claudia G. Rocha , Luis E. F. Foa Torres , Gianaurelio Cuniberti

Based on atomistic simulations, the nonlinear elastic properties of monolayer graphene nanoribbons under quasistatic uniaxial tension are predicted, emphasizing the effect of edge structures (armchair and zigzag, without and with hydrogen…

介观与纳米尺度物理 · 物理学 2010-07-21 Qiang Lu , Rui Huang

This work describes the development of a third-generation charge optimized many-body (COMB3) potential for Al-C and its application to the investigation of aluminum/graphene nanostructures. In particular, the new COMB3 potential was used to…

材料科学 · 物理学 2019-12-04 Difan Zhang , Alexandre F. Fonseca , Tao Liang , Simon R. Phillpot , Susan B. Sinnott

We focused on elastic properties of B- and N-doped graphene in wide range of concentrations up to 20%. The Young's, bulk and shear moduli and Poisson's ratio have been calculated by means of the density functional theory for a…

材料科学 · 物理学 2013-10-08 Karolina Z. Milowska , Magdalena Woinska , Malgorzata Wierzbowska

A nano-stitching method is proposed and investigated to modify graphene bilayers. Based this method, four types of low energy carbon allotropes, "wormhole graphene" allotropoes, are obtained and their structures, stabilities and electronic…

材料科学 · 物理学 2015-05-18 Chaoyu He , JinLi , Jianxin Zhong