AUTHORS: Wang CH, Chien CC, Yu YL, Liu CJ, Lee CF, Chen CH

Journal of Synchrotron Radiation, 14(6): 477-82, December 2007

ABSTRACT

The formation of colloidal unmodified (naked) gold nanoparticles is investigated by irradiation of a precursor solution with X-rays from a synchrotron source. An interesting morphological evolution as a function of exposure time, from cross-linked network-like structure to individual particles, has been discovered. The particle size decreased with the exposure time and was influenced by the ionic strength of the precursor solution. Contrary to gamma-ray exposure, an OH radical scavenger was not required for cluster formation.

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