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Search Publications by

Vinod Tewary (Fed)

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Displaying 1 - 25 of 54

Ullmann-like reactions for the synthesis of complex two-dimensional materials

September 28, 2016
Rebecca C. Quardokus, Vinod K. Tewary, Frank W. DelRio
Engineering two-dimensional materials through surface-confined synthetic techniques is a promising avenue for designing new materials with tailored properties. Developing and understanding methods for surface-confined synthesis of two-dimensional materials

Particle-based simulation of nanoscale systems and materials

January 1, 2015
Alexander Y. Smolyanitsky, Vinod K. Tewary
This book chapter is focused on the introduction of molecular dynamics (MD) and molecular statics (MS), as well as some of their uses for studying the thermomechanical and (indirectly) electronic properties at the nanoscale. We first introduce the general

Electron Energy Loss Function of Silicene and Germanene Multilayers on Silver

November 4, 2013
Anna L. Rast, Vinod K. Tewary
We calculate electron energy loss spectra (EELS) for composite plasmonic structures based on silicene and germanene. A continued-fraction expression for the effective dielectric function is used to perform multiscale calculations of EELS for both silicene

Stratified Graphene-Noble Metal Systems for Low-Loss Plasmonics Applications

January 30, 2013
Anna L. Rast, Timothy Sullivan, Vinod K. Tewary
We demonstrate numerically that bulk plasmon losses in noble metal films can be significantly reduced through the addition of a graphene coating and hexagonal boron nitride substrate. Silver films with a trilayer graphene coating and hBN substrate

Effect of elastic deformation on frictional properties of few-layer graphene

January 9, 2012
Alexander Y. Smolyanitsky, Jason P. Killgore, Vinod K. Tewary
We describe the results of Brownian dynamics (BD) simulations of an AFM tip scanned on locally suspended few-layer graphene. The effects of surface compliance and sample relaxation are directly related to the observed friction force. We demonstrate that

Modeling electromigration using the peridynamics approach

August 28, 2011
David T. Read, Walter Gerstle, Vinod K. Tewary
This chapter presents a summary of the information and reasoning needed to justify learning about peridynamics for the purpose of analyzing electromigration and provides guidance for the development of a complete peridynamics analysis. The additions needed

Graphene-metal interconnect: an atomistic simulation

August 11, 2011
Alexander Y. Smolyanitsky, Vinod K. Tewary
We develop a set of computationally efficient and accurate interatomic interactions for an atomistic simulation of the properties of graphene on nickel surface. The approach is based on the modified embedded atom method (MEAM) for the C-C and Ni-Ni

Simulation of lattice strain due to CNT-metal interface

January 17, 2011
Alexander Y. Smolyanitsky, Vinod K. Tewary
We report an atomistic molecular statics study of strains in single wall carbon nanotubes (SWCNTs) interfaced with a planar nickel surface. We calculate axial and radial strain distributions along the SWCNT axis. We demonstrate strains of up to 2%

Erratum: Parametric interatomic potential for graphene

January 13, 2010
Vinod K. Tewary
This paper is an erratum that corrects some typographical errors in our earlier paper "Parametric interatomic potential for graphene" by V.K. Tewary and B. Yang, published in Physical Review B 79, 075442 (2009).

Singularity in the Debye-Waller factor of graphene

March 16, 2009
Vinod K. Tewary, B. Yang
It is shown that the Debye-Waller factor for graphene has a singularity. However, the singularity does not affect the zero-temperature value of the Debye-Waller factor. We calculate the zero-temperature limit of the mean-square displacement separately for

A parametric interatomic potential for graphene

February 27, 2009
Vinod K. Tewary, B. Yang
A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: bond energy and radial interaction energy. The bond energy part is a generalized version of the Tersoff-Brenner potential. It includes angular terms

Multiscale Green's function for deflection of graphene lattice

June 2, 2008
B. Yang, Vinod Tewary
Fundamental deflection behavior of an infinite two-dimensional graphene lattice subjected to a transverse point force has been analyzed using lattice statics and the continuum Green's functions. An analytic expression has been derived for the lattice

Multiscale Modeling of Lattice Defects in Si-Ge(001) Quantum Wells

April 9, 2008
B. Yang, Vinod Tewary
A computationally efficient hybrid Green¿s function (GF) technique is developed for multiscale modeling of lattice defects in a trilayer material system that links seamlessly the length scales from lattice (sub-nanometers) to continuum (bulk). The model

Peridynamic Simulation of Electromigration

January 1, 2008
David T. Read, Walter Gerstle, Stewart Silling, Vinod K. Tewary, Richard Lehoucq
A theoretical framework, based upon the peridynamic model, is presented for analytical and computational simulation of electromigration. The framework allows four coupled physical processes to be modeled simultaneously: mechanical deformation, heat

Multiscale modeling of point defects in strained silicon

December 31, 2007
Vinod Tewary, B. Yang
A multiscale Green's function method is described for modeling substitutional point defects and vacancies in strained silicon. The model seamlessly links the length scales from atomistic to macro. The model accounts for the discrete lattice effects