Laser ablation of ternary As-S-Se glasses and time-of-flight mass spectrometric study.
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.
Pangavhane
Sachinkumar Dagurao
SD
Department of Chemistry, Faculty of Science, Masaryk University, Kotlárská 2, 611 37 Brno, Czech Republic.
Houska
Jan
J
Wágner
Tomás
T
Pavlista
Martin
M
Janca
Jan
J
Havel
Josef
J
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
D001152:Arsenicals; D013440:Sulfides; C045816:arsenic trisulfide; D012643:Selenium