Nano Archive

Crystal Growth of Thiol-Stabilized Gold Nanoparticles by Heat-Induced Coalescence

Moon, Sook Young and Tanaka, Shun-ichiro and Sekino, Tohru (2010) Crystal Growth of Thiol-Stabilized Gold Nanoparticles by Heat-Induced Coalescence. Nanoscale Research Letters, 5 (5). pp. 813-817.

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Abstract

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 interaction energy between thiol macromolecules is larger than that between a thiol and a nanoparticle. The gold nanoparticles approached each other and grew into large single or twinned crystals because of the van der Waals attraction and the heat generated by the exothermic formation of disulfides.

Item Type:Article
Uncontrolled Keywords:Au Nanoparticle Polygon Coalescence Dodecanethiol Surface stabilization Self-organization
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanofabrication processes and tools
Material Science > Nanochemistry
ID Code:9011
Deposited By:Lesley Tobin
Deposited On:10 Aug 2010 11:14
Last Modified:10 Aug 2010 11:14

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