Premium
Laser ablation synthesis of new gold arsenides using nano‐gold and arsenic as precursors. Laser desorption ionisation time‐of‐flight mass spectrometry and spectrophotometry
Author(s) -
Prokeš Lubomír,
PeñaMéndez Eladia María,
Conde José Elias,
Panyala Nagender Reddy,
Alberti Milan,
Havel Josef
Publication year - 2014
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.6815
Subject(s) - chemistry , mass spectrometry , laser ablation , stoichiometry , analytical chemistry (journal) , arsenic , desorption , colloidal gold , reflectron , arsenide , laser , nanoparticle , time of flight mass spectrometry , ionization , ion , adsorption , nanotechnology , chromatography , materials science , gallium arsenide , physics , optoelectronics , organic chemistry , optics
RATIONALE Currently, a limited number of gold arsenides have been described, some of which have important industrial applications, Laser ablation synthesis (LAS) has been employed in an attempt to generate some novel gold arsenide compounds. METHODS LAS of gold arsenides was performed using nano‐gold (NG) and arsenic as precursors. The clusters formed during laser desorption ionisation (LDI) were analysed by mass spectrometry using a quadrupole ion trap and reflectron time‐of‐flight analyser to determine the stoichiometry. UV/VIS spectrophotometry was used to follow possible hydrothermal synthesis of gold arsenides. RESULTS LAS of NG yielded singly charged gold clusters Au m +(−) ( m = 1–35). LAS of bulk arsenic and nano‐arsenic produced As n +(−) clusters with n = 2–10 and n = 2–20, respectively. Laser ablation of Au‐As nano‐composites or NG‐As mixtures generated Au m +(−) ( m = 1–12), As n +(−) ( n = 3–4), and several series of Au m As n +(−) ( m = 1–60, n = 1–18) clusters. Over 450 species of gold arsenide clusters and 212 mixed chlorinated Au m As n Cl x clusters were detected and their stoichiometry determined. CONCLUSIONS Many new gold arsenides were synthesised via LAS for the first time with Au‐As composites and NG‐As mixtures of different Au:As ratios using mass spectrometry to determine cluster stoichiometry. The resolved stoichiometry of Au m As n clusters determined in this study could accelerate the development of advanced Au‐As nano‐materials. Copyright © 2014 John Wiley & Sons, Ltd.