Preparation of cationic gold nanoparticles in aqueous solutions of 2-aminoethanethiol hydrochloride

Takahito Kawano, Yukichi Horiguchi, Yasuro Niidome, Takuro Niidome, Sunao Yamada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cationic gold nanoparticles were obtained by chemical reduction of tetrachloroaurate (AuCl4-) in the presence of the 2-aminoethanethiol (AET). Formation of colloidal gold nanoparticles was monitored by absorption spectroscopy, light scattering, and zeta potential measurements. Colloidal gold nanoparticles were obtained when the ratio of AuCl4- and AET was about 1:1.5. The mean size and the zeta potential of the nanoparticles was 34 ± 6 nm and + 44 ± 24 mV, respectively. The polyethyleneoxide compound terminated with a SH group (PEG-SH) increased the mean size of the nanoparticles (49 ± 18 nm), but decreased zeta potentials of the gold nanoparticles (+ 16 ± 7 mV). The PEG-SH was effective to stabilize the colloidal dispersion of the gold nanoparticles.

Original languageEnglish
Pages (from-to)521-526
Number of pages6
Journalbunseki kagaku
Volume54
Issue number6
DOIs
Publication statusPublished - Jun 1 2005

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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