Laser Desorption Ionization of As 2 Ch 3 (Ch = S, Se, and Te) Chalcogenides Using Quadrupole Ion Trap Time-of-Flight Mass Spectrometry: A Comparative Study

Abstract

Laser desorption ionization using time-of-flight mass spectrometer afforded with quadrupole ion trap was used to study As₂Ch₃ (Ch = S, Se, and Te) bulk chalcogenide materials. The main goal of the study is the identification of species present in the plasma originating from the interaction of laser pulses with solid state material. The generated clusters in both positive and negative ion mode are identified as 10 unary (S_p ^+/– and As_m ^+/– ) and 34 binary (As_m S_p ^+/– ) species for As₂S₃ glass, 2 unary (Se_q ^+/– ) and 26 binary (As_m Se_q ^+/– ) species for As₂Se₃ glass, 7 unary (Te_r ^+/– ) and 23 binary (As_m Te_r ^+/– ) species for As₂Te₃ material. The fragmentation of chalcogenide materials was diminished using some polymers and in this way 45 new, higher mass clusters have been detected. This novel approach opens a new possibility for laser desorption ionization mass spectrometry analysis of chalcogenides as well as other materials.

Graphical abstract

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