Luminescent gold nanoparticles capped with tiopronin derivatives

Kin Ming Lam, Pak Ho Chan, Kwok Yin Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


This paper describes the preparation of gold nanoparticles passivated with different tiopronin-like thiol peptide derivatives. The average size of these gold particles falls into the range of 1.7-2.1 nm with narrow dispersity. All the gold nanoparticles exhibit near-IR luminescence in the spectral range of 700-950 nm. The luminescence properties of the gold nanoparticles depend on the structure of the capping ligands; those capped with polar thiol peptides give weaker luminescence in water. Reducing the packing efficiency of the passivating layer by bulky ligands is likely to facilitate the luminescence quenching effects of foreign quenchers and hence weaken the luminescence of the gold nanoparticles.
Original languageEnglish
Pages (from-to)2337-2345
Number of pages9
JournalJournal of Nanoscience and Nanotechnology
Issue number4
Publication statusPublished - 1 Apr 2009


  • Gold nanoparticles
  • Ligand effects
  • Luminescence
  • Tiopronin

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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