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Graphene-based nanofolds (GNFs) are edge-connected 2D stacked monolayers originated from single-layer graphene. Graphene-based nanoscrolls (GNSs) are nanomaterials with geometry resembling graphene layers rolled up into a spiral…

材料科学 · 物理学 2021-09-23 Marcelo Lopes Pereira Junior , Luiz Antonio Ribeiro Junior

We explore dynamic structural superlubricity for the case of a relatively large contact area, where the friction force is proportional to the area (exceeding $\sim 100\,nm^2$) experimentally, numerically, and theoretically. We use a setup…

We employ molecular dynamic simulations to study the reduction process of graphene-oxide (GO) in a chemically active environment enriched with hydrogen. We examine the concentration and pressure of hydrogen gas as a function of temperature…

材料科学 · 物理学 2016-09-28 Ramin M. Abolfath , Kyeongjae Cho

Formation of wrinkles is a common phenomenon in the large area growth of two dimensional layered materials on metallic substrates. Wrinkles can significantly affect the working of 2D materials based large scale electronic devices and…

介观与纳米尺度物理 · 物理学 2021-08-11 Monika Moun , Aastha Vasdev , Rajashekhar Pujar , K. Priya Madhuri , U. Mogera , Neena S. John , G. U. Kulkarni , Goutam Sheet

The quantum entanglement phenomenon was demonstrated to operate on a bipartite entangled system composed of two single layers of graphene embedded in an electrolytic medium (which did not permit the transport of electrons) and subjected to…

综合物理 · 物理学 2024-10-17 David A. Miranda , Edgar F. Pinzón , Paulo R. Bueno

Graphene, a thinnest material in the world, can form moire structures on different substrates, including graphite, h-BN, or metal surfaces. In such systems the structure of graphene, i. e. its corrugation, as well as its electronic and…

介观与纳米尺度物理 · 物理学 2016-07-12 Elena Voloshina , Yuriy Dedkov

We have studied solid hydrogen up to pressures of 300 GPa and temperatures of 350 K using density functional theory methods and have found "mixed structures" that are more stable than those predicted earlier. Mixed structures consist of…

材料科学 · 物理学 2012-06-20 Chris J. Pickard , Miguel Martinez-Canales , Richard J. Needs

Graphane is a quasi-two-dimensional material consisting of a single layer of fully hydrogenated graphene, with a C:H ratio of 1. We study nuclear quantum effects in the so-called chair-graphane by using path-integral molecular dynamics…

化学物理 · 物理学 2020-08-24 Carlos P. Herrero , Rafael Ramirez

Time kinetics of interaction of natural graphite (GR) to colloidal graphene (G) collagen (C) nanocomposites was studied at ambient conditions, and observed that just one day at ambient conditions is enough to form colloidal graphene…

生物大分子 · 定量生物学 2015-12-01 Soumya Bhattacharya , Purbarun Dhar , Sarit K Das , Ranjan Ganguly , Thomas Webster , Suprabha Nayar

The hexagonal structure of graphene gives rise to the property of gas impermeability, motivating its investigation for a new application: protection of semiconductor photocathodes in electron accelerators. These materials are extremely…

Graphene is the extreme material for molecular sensory and hydrogen storage applications because of its two-dimensional geometry and unique structure-property relationship. In this Letter, hydrogenation of graphene is discussed in the…

材料科学 · 物理学 2010-02-10 Zhiping Xu , Kun Xue

Finite-temperature properties of graphene monolayers under tensile stress have been studied by path-integral molecular dynamics (PIMD) simulations. This method allows one to consider the quantization of vibrational modes in these…

材料科学 · 物理学 2018-02-14 Carlos P. Herrero , Rafael Ramirez

We measure the concentration of carbon adatoms on the Ru(0001) surface that are in equilibrium with C atoms in the crystal's bulk by monitoring the electron reflectivity of the surface while imaging. During cooling from high temperature, C…

材料科学 · 物理学 2010-12-14 Kevin F. McCarty , Peter J. Feibelman , Elena Loginova , Norman C. Bartelt

The process of hydrogen desorption from graphane (graphene sheet saturated by hydrogen adsorbed from both sides) has been studied using the method of molecular dynamics. The temperature dependences of the time of desorption onset for…

介观与纳米尺度物理 · 物理学 2010-01-08 L. A. Openov , A. I. Podlivaev

The interaction between two different materials can present novel phenomena that are quite different from the physical properties observed when each material stands alone. Strong electronic correlations, such as magnetism and…

The effective mass approximation is analysed in a nonperturbative kinetic theory approach to strong field excitations in graphene [1,2]. This problem is highly actual for the investigation of quantum radiation from graphene [3], where the…

介观与纳米尺度物理 · 物理学 2023-01-31 D. B. Blaschke , V. V. Dmitriev , N. T. Gevorgyan , B. Mahato , A. D. Panferov , S. A. Smolyansky , V. A. Tseryupa

Energetic and geometric aspects of the permeation of low-Z atoms through graphene sheets are investigated. Energy barriers and deformations are calculated via density functional theory for the permeation of H, He, Li and Be atoms at several…

化学物理 · 物理学 2012-10-02 Stefan E. Huber , Andreas Mauracher , Michael Probst

We studied the interaction between a single hydrogen atom and a single graphene using classical molecular dynamics simulation with modified Brenner REBO potential. Three interactions, which are adsorption, reflection, penetration, were…

材料科学 · 物理学 2007-10-16 Atsushi Ito , Arimichi Takayama , Hiroaki Nakamura

It is shown using the method of molecular dynamics that the motion of carbon nanoparticles (rectangular graphene flakes, spherical fullerenes of size $L<10$ nm) on the surface of a thermalized graphene sheet lying on a flat substrate can be…

介观与纳米尺度物理 · 物理学 2022-11-30 Alexander V. Savin

Using a tight-binding atomistic simulation, we simulate the recent atomic-force microscopy experiments probing the slipperiness of graphene flakes made slide against a graphite surface. Compared to previous theoretical models, where the…

介观与纳米尺度物理 · 物理学 2009-09-01 Federico Bonelli , Nicola Manini , Emiliano Cadelano , Luciano Colombo