Crystal growth of Thiol-Stabilized gold nanoparticles by Heat-Induced coalescence

Sook Young Moon, Shun ichiro Tanaka, Tohru Sekino

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)813-817
Number of pages5
JournalNanoscale Research Letters
Volume5
Issue number5
DOIs
Publication statusPublished - 2010 May

Keywords

  • Au
  • Coalescence
  • Dodecanethiol
  • Nanoparticle
  • Polygon
  • Self-organization
  • Surface stabilization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Crystal growth of Thiol-Stabilized gold nanoparticles by Heat-Induced coalescence'. Together they form a unique fingerprint.

Cite this