منابع مشابه
Coalescence Behavior of Gold Nanoparticles
The tetraoctylammonium bromide (TOAB)-stabilized gold nanoparticles have been successfully fabricated. After an annealing of the as-synthesized nanoparticles at 300 degrees C for 30 min, the coalescence behavior of gold nanoparticles has been investigated using high-resolution transmission electron microscopy in detail. Two types of coalescence, one being an ordered combination of two or more p...
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The present work investigates the coalescence process of two gold nanoparticles for a host of initial temperatures and starting radii in vacuum with the help of molecular dynamics (MD) simulations. Diverse mechanisms of the first sintering stage, characterized by a growing neck region, were found. The results are compared with a phenomenological macroscopic model based on an energy balance and ...
متن کاملCoalescence and Collisions of Gold Nanoparticles
We study the assembling of small gold clusters subject to collisions and close contact coalescence by using molecular dynamics simulations to simulate events that occur typically in the sputtering process of synthesis. Our results support the notion that the kinetics of coalescence processes strongly determine the geometry and structure of the final particle. While impact velocities, relative o...
متن کاملCrystal Growth of Thiol-Stabilized Gold Nanoparticles by Heat-Induced Coalescence
A monolayer of dodecanethiol-stabilized gold nanoparticles changed into two-dimensional and three-dimensional self-organized structures by annealing at 323 K. Subsequent crystal growth of gold nanoparticles occurred. Thiol molecules, although chemisorbed, form relatively unstable bonds with the gold surface; a few thiols desorbed from the surface and oxidized to disulfides at 323 K, because the...
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A rapid biological synthesis of multifunctional gold nanoparticle (AuNp) and monodisperse silver nanoparticle (AgNp) was achieved by an aqueous extract of black Panax ginseng Meyer root. The physicochemical transformation into black ginseng (BG) greatly enhanced the pharmacological activities of white ginseng and its minor ginsenoside content. The optimal temperature conditions and kinetics of ...
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ژورنال
عنوان ژورنال: Nanoscale Research Letters
سال: 2009
ISSN: 1931-7573,1556-276X
DOI: 10.1007/s11671-009-9298-6