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Adhesion between Faceted Gold Nanoparticles Dan Mordehai1

Summary: Adhesion between Faceted Gold Nanoparticles
Dan Mordehai1
, Eugen Rabkin1
, and David Srolovitz2
Department of Materials Engineering, Technion - Israel Institute of Technology, 32000
Haifa, Israel.
Department of Physics, Yeshiva University, New York, NY 10033, USA.
Nanoparticles serve as basic building blocks in a variety of nanotechnology-related
applications and nanostructured bulk materials. A key issue in the fabrication and/or
operation of many of these systems is associated with the nature of adhesion between
nanoparticles. Such effects are particularly important because of the large fraction of
atoms in the nanoparticle that are on the surface. Adhesion between particles is
routinely described through continuum models of contact between elastically isotropic
homogenous bodies.
In this work, we employ molecular dynamics simulations to investigate the adhesion
between two faceted Au nanoparticles (Figure 1a). The simulations demonstrate that the
jump-to-contact of faceted particles is mediated by extensive dislocation activity. Partial
dislocations form near the first point of contact, propagate into the particle with trailing


Source: Adler, Joan - Physics Department, Technion, Israel Institute of Technology


Collections: Physics