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You searched on: Author: Vinod Tewary

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1. Multiscale Green‰s functions for modeling of nanomaterials: Bridging length and time scales
Published: 3/17/2015
Author: Vinod K Tewary
Abstract: Green's function gives the response of a system to a probe and is a powerful technique for solving a variety of problems in science and engineering. We describes a multiscale Green's function method for modeling nanomaterials at different length and ...

2. Particle-based simulation of nanoscale systems and materials
Published: 1/1/2015
Authors: Alexander Y Smolyanitsky, Vinod K Tewary
Abstract: 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 th ...

3. Electron Energy Loss Function of Silicene and Germanene Multilayers on Silver
Published: 11/4/2013
Authors: Anna Lauren E. (Lauren) Rast, Vinod K Tewary
Abstract: 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 ...

4. Manipulation of graphene‰s dynamic ripples by local harmonic out-of-plane excitation
Published: 1/11/2013
Authors: Alexander Y Smolyanitsky, Vinod K Tewary
Abstract: With use of carefully designed molecular dynamics simulations, we demonstrate tuning of dynamic ripples in free-standing graphene by applying a local out-of-plane sinusoidal excitation. Depending on the boundary conditions and external modulation, we ...

5. Effect of elastic deformation on frictional properties of few-layer graphene
Published: 1/9/2012
Authors: Alexander Y Smolyanitsky, Jason Philip Killgore, Vinod K Tewary
Abstract: 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 t ...

6. Phenomenological interatomic potentials for silicon, germanium and their binary alloy
Published: 10/17/2011
Author: Vinod K Tewary
Abstract: A phenomenological potential is constructed for interatomic interactions in silicon, germanium, and their binary alloy. The potential is based upon the same physical principles as the modified embedded atom potential (MEAM) but is different in detail ...

7. Modeling electromigration using the peridynamics approach
Published: 8/28/2011
Authors: David Thomas Read, Walter Gerstle, Vinod K Tewary
Abstract: 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 ...

8. Graphene-metal interconnect: an atomistic simulation
Published: 8/11/2011
Authors: Alexander Y Smolyanitsky, Vinod K Tewary
Abstract: 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 i ...

9. A semicontinuum model for Si(x)Ge(1-x) alloys: calculation of their elastic characteristics and the strain field at the free surface of a semi-infinite alloy
Published: 7/11/2011
Authors: Vinod K Tewary, Mark D Vaudin
Abstract: A semicontiuum Green‰s-function-based model is proposed for analysis of averaged mechanical characteristics of Si(x)Ge(1-x). The atomistic forces in the model are distributed at discrete lattice sites, but the Green‰s function is approximated by the ...

10. Simulation of lattice strain due to CNT-metal interface
Published: 1/17/2011
Authors: Alexander Y Smolyanitsky, Vinod K Tewary
Abstract: 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% ex ...

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