Laser ablation generation of clusters from As‐Te mixtures, As‐Te glass nano‐layers and from Au‐As‐Te nano‐composites. Quadrupole ion trap time‐of‐flight mass spectrometry. (20th April 2015)

• Record Type: Journal Article
• Authors: Štěpánová, Vlasta; Prokeš, Lubomír; Slavíček, Pavel; Alberti, Milan; Havel, Josef
• Is Part Of: Rapid communications in mass spectrometry. Volume 29:Number 11(2015)
• Page Start: 1000
• Page End: 1008
• Publication Date: 2015-04-20
• Subjects: Mass spectrometry -- Periodicals; 543.65
• DOI: 10.1002/rcm.7193
• Languages: English
• ISSNs: 0951-4198

Abstract

Abstract : Rationale: Arsenic tellurides have found important applications in various fields of science, but only a few gold‐arsenic tellurides have been reported. Laser ablation synthesis (LAS), a suitable method for the generation of new compounds, has been used to generate clusters from As‐Te mixtures, an As‐Te glass and Au‐As‐Te nano‐composites. Methods: Chalcogenide glass nano‐layers prepared via Physical Vapour Deposition – thermal evaporation were characterized using scanning electron microscopy (SEM) and energy‐dispersive X‐ray spectroscopy (EDX). LAS with laser desorption ionisation quadrupole ion trap time‐of‐flight mass spectrometry (LDI QIT TOFMS) was used for the generation and analysis of new Au x As m Te n clusters. The stoichiometry of the clusters was determined via isotopic envelope modelling. Results: A simple procedure for the preparation of the Au‐As‐Te nano‐composite was developed. From As‐Te mixtures only five binary As m Te n clusters were generated, while from a glass layer 10 binary As m Te n clusters were identified, because during the deposition of the glass the elements reacted with each other to form a complex three‐dimensional (3D) structure. Using LAS on the Au‐As‐Te nano‐composite leads to the formation of six unary Te n ( n = 1–6), 16 binary (As m Te n and Au x Te n ), and 31 ternary Au x As m Te n clusters. Conclusions: LAS was demonstrated to be a useful technique for the generation of Aux As m Te n clusters in the gas phase. More As m Te n clusters were generated from the deposited glass layers than from As‐Te mixtures. Most of the ternary Au x As m Te n clusters generated from the nano‐composite are reported here for the first time. Copyright © 2015 John Wiley & Sons, Ltd.