Structural properties of naked gold nanoparticles formed by synchrotron X-ray irradiation.
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.
Wang
Chang Hai
CH
Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan.
Chien
Chia Chi
CC
Yu
Yen Lu
YL
Liu
Chi Jen
CJ
Lee
Cheng Feng
CF
Chen
Chih Hsiung
CH
Hwu
Y
Y
Yang
Chung Shi
CS
Je
Jung Ho
JH
Margaritondo
G
G
D019840:2-Propanol / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000494:pharmacology; D017979:Gold Colloid / Q000737:chemistry / Q000528:radiation effects*; D053768:Metal Nanoparticles / Q000737:chemistry / Q000528:radiation effects*; D046529:Microscopy, Electron, Transmission; D009994:Osmolar Concentration; D014965:X-Rays
D016166:Free Radical Scavengers; D017979:Gold Colloid; D019840:2-Propanol