title: Structural properties of naked gold nanoparticles formed by synchrotron X-ray irradiation.
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.
authors.affiliation: Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan.
authors.forename: Chang Hai
authors.initials: CH
authors.lastname: Wang
authors.forename: Chia Chi
authors.initials: CC
authors.lastname: Chien
authors.forename: Yen Lu
authors.initials: YL
authors.lastname: Yu
authors.forename: Chi Jen
authors.initials: CJ
authors.lastname: Liu
authors.forename: Cheng Feng
authors.initials: CF
authors.lastname: Lee
authors.forename: Chih Hsiung
authors.initials: CH
authors.lastname: Chen
authors.forename: Y
authors.initials: Y
authors.lastname: Hwu
authors.forename: Chung Shi
authors.initials: CS
authors.lastname: Yang
authors.forename: Jung Ho
authors.initials: JH
authors.lastname: Je
authors.forename: G
authors.initials: G
authors.lastname: Margaritondo
mesh_terms: 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
chemical_list: D016166:Free Radical Scavengers; D017979:Gold Colloid; D019840:2-Propanol