Size control in the synthesis of 1-6 nm gold nanoparticles via solvent-controlled nucleation

Jieun Song, Dukhan Kim, Dongil Lee

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

We report a facile synthetic route for size-controlled preparation of gold nanoparticles. Nearly monodisperse gold nanoparticles with core diameters of 1-6 nm were obtained by reducing AuP(Phenyl)3Cl with tert-butylamine borane in the presence of dodecanethiol in the solvent mixture of benzene and CHCl3. Mechanism studies have shown that the size control is achieved by the solvent-controlled nucleation in which the nuclei concentration increases with increasing the fraction of CHCl3, leading to smaller particles. It was also found that, following the solvent-controlled nucleation, particle growth occurs via ligand replacement of PPh3 on the nuclei by Au(I)thiolate generated by the digestive etching of small particles. This synthetic strategy was successfully demonstrated with other alkanethiols of different chain length with which size-controlled, monodisperse gold nanoparticles were prepared in remarkable yield without requiring any postsynthesis treatments.

Original languageEnglish
Pages (from-to)13854-13860
Number of pages7
JournalLangmuir
Volume27
Issue number22
DOIs
Publication statusPublished - 2011 Nov 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint Dive into the research topics of 'Size control in the synthesis of 1-6 nm gold nanoparticles via solvent-controlled nucleation'. Together they form a unique fingerprint.

Cite this