title: An in situ XAFS study--the formation mechanism of gold nanoparticles from X-ray-irradiated ionic liquid.
abstract: An in situ X-ray absorption fine structure (XAFS) experiment has been performed to observe the evolution of gold nanoparticles in the ionic liquid [BMIM][AuCl4], by hard X-ray irradiation. The ionic liquid acts as both a reducing agent and a protective ligand. A synchrotron-based X-ray plays the role of the irradiation source, which induces the reduction of the gold species, as well as being a real time probe for XAFS measurements. From the extended X-ray absorption fine structure (EXAFS) fitting results for a series of spectra of gold L3-edge, it can be seen clearly that there is a single Au-Cl bond breaking process before the formation of Au-Au bonds, which is different from previous reports on the formation of Au nanoparticles by several chemical methods.
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019, Jia Luo Road, Jiading District, Shanghai, 201800, China.
authors.forename: Jingyuan
authors.initials: J
authors.lastname: Ma
authors.forename: Yang
authors.initials: Y
authors.lastname: Zou
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiang
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Jiong
authors.initials: J
authors.lastname: Li
authors.forename: Guozhong
authors.initials: G
authors.lastname: Wu
authors.forename: Yuying
authors.initials: Y
authors.lastname: Huang
authors.forename: Hongjie
authors.initials: H
authors.lastname: Xu