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 journalArticlepeer-review

2 Citations (Scopus)


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
Issue number6
Publication statusPublished - Jun 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry


Dive into the research topics of 'Preparation of cationic gold nanoparticles in aqueous solutions of 2-aminoethanethiol hydrochloride'. Together they form a unique fingerprint.

Cite this