Laser ablation of ternary As‐S‐Se glasses and time‐of‐flight mass spectrometric study |
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Authors: | Sachinkumar Dagurao Pangavhane Jan Houška Tomáš Wágner Martin Pavlišta Jan Janča Josef Havel |
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Institution: | 1. Department of Chemistry, Faculty of Science, Masaryk University, Kotlá?ská 2, 611 37 Brno, Czech Republic;2. Department of General and Inorganic Chemistry and Research Centre, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic;3. Centre for Material Science, University of Pardubice, 532 10 Pardubice, Czech Republic;4. Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlá?ská 2, 611 37 Brno, Czech Republic |
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Abstract: | Ternary chalcogenide As‐S‐Se glasses, important for optics, computers, material science and technological applications, are often made by pulsed laser deposition (PLD) technology but the plasma composition formed during the process is mostly unknown. Therefore, the formation of clusters in a plasma plume from different glasses was followed by laser desorption ionization (LDI) or laser ablation (LA) time‐of‐flight mass spectrometry (TOF MS) in positive and negative ion modes. The LA of glasses of different composition leads to the formation of a number of binary AspSq, AspSer and ternary AspSqSer singly charged clusters. Series of clusters with the ratio As:chalcogen = 3:3 (As3S, As3S2Se+, As3SSe), 3:4 (As3S, As3S3Se+, As3S2Se, As3SSe, As3Se), 3:1 (As3S+, As3Se+), and 3:2 (As3S, As3SSe+, As3Se), formed from both bulk and PLD‐deposited nano‐layer glass, were detected. The stoichiometry of the AspSqSer clusters was determined via isotopic envelope analysis and computer modeling. The structure of the clusters is discussed. Copyright © 2009 John Wiley & Sons, Ltd. |
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