title: Matrix-assisted laser ablation production of gold cluster ions from Au-coated photonic crystals.
abstract: A new strategy was explored to generate pure gold cluster ions, Au(n)(+/-), from gold films deposited on solid substrates via a matrix-assisted laser ablation technique. The gold films deposited on SiO(2)-particle-assembled photonic crystals were demonstrated to be the most ideal compared with the films deposited on various glass slides. Dropped with a matrix of 2-(4-hydroxyphenylazo) benzoic acid and bombarded by nitrogen pulse laser (355 nm), they could release a series of Au(n)(+) with n more than 110 or Au(n)(-) with n more than 60 according to the data obtained by inline time-of-flight mass spectrometry. The gold-deposited photonic crystal substrates could be stored at room temperature for at least 6 months. The method is hence steady and convenient in use.
authors.affiliation: Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Jincheng
authors.initials: J
authors.lastname: Li
authors.forename: Jian'an
authors.initials: J
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Chen
mesh_terms: D003460:Crystallization; D005841:Gentisates / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D054020:Lasers, Gas; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure*; D055095:Optics and Photonics / Q000295:instrumentation / Q000379:methods; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
chemical_list: D005841:Gentisates; D006046:Gold; D012822:Silicon Dioxide; C010925:2,5-dihydroxybenzoic acid