Reversible formation and dissolution of gold nanoparticles through turning on and off sequences of UV light

Ki-Hyun Kim; Jong-Uk Kim; Sang-Ho Cha; Jong-Chan Lee

doi:10.1021/ja8088394

Reversible formation and dissolution of gold nanoparticles through turning on and off sequences of UV light

J Am Chem Soc. 2009 Jun 10;131(22):7482-3. doi: 10.1021/ja8088394.

Authors

Ki-Hyun Kim¹, Jong-Uk Kim, Sang-Ho Cha, Jong-Chan Lee

Affiliation

¹ Department of Chemical and Biological Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-744, South Korea.

PMID: 19489633
DOI: 10.1021/ja8088394

Abstract

Reversible formation and dissolution of gold nanoparticles through turning on and off UV light was reported. Gold ions (Au(3+)) were reduced to monodispersed gold nanoparticles by UV irradiation from a mixture of comb-like poly(oxyethylene)s and a gold salt. The prepared gold nanoparticles dissolved to yield gold ions (Au(3+)) when the UV light was switched off. Such formation and dissolution could be repeated persistently by turning the UV light on and off repeatedly.