title: Laser ablation of ternary As-S-Se glasses and time-of-flight mass spectrometric study.
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 As(p)S(q), As(p)Se(r) and ternary As(p)S(q)Se(r) singly charged clusters. Series of clusters with the ratio As:chalcogen = 3:3 (As(3)S(3)(+), As(3)S(2)Se(+), As(3)SSe(2)(+)), 3:4 (As(3)S(4)(+), As(3)S(3)Se(+), As(3)S(2)Se(2)(+), As(3)SSe(3)(+), As(3)Se(4)(+)), 3:1 (As(3)S(+), As(3)Se(+)), and 3:2 (As(3)S(2)(+), As(3)SSe(+), As(3)Se(2)(+)), formed from both bulk and PLD-deposited nano-layer glass, were detected. The stoichiometry of the As(p)S(q)Se(r) clusters was determined via isotopic envelope analysis and computer modeling. The structure of the clusters is discussed.
authors: Department of Chemistry, Faculty of Science, Masaryk University, Kotlárská 2, 611 37 Brno, Czech Republic.
authors: Sachinkumar Dagurao
authors: SD
authors: Pangavhane
authors: Jan
authors: J
authors: Houska
authors: Tomás
authors: T
authors: Wágner
authors: Martin
authors: M
authors: Pavlista
authors: Jan
authors: J
authors: Janca
authors: Josef
authors: J
authors: Havel
mesh_terms: D001152:Arsenicals / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects; D005898:Glass / Q000032:analysis* / Q000737:chemistry*; D007834:Lasers; D012643:Selenium / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D013440:Sulfides / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D001152:Arsenicals; D013440:Sulfides; C045816:arsenic trisulfide; D012643:Selenium