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.

Laser desorption ionization time‐of‐flight mass spectrometric study of binary As‐Se glasses

“…A variety of different species is observed in the plasma plume. In agreement with previous results, we suggest that most of them are fragments of the solid-phase structures, 22,25 as indicated for the studied As-Se glasses in Fig. 8.…”

Laser desorption ionization time‐of‐flight mass spectrometry of erbium‐doped Ga‐Ge‐Sb‐S glasses

“…In addition, the LDI and MALDI results for the inorganic polymer, P 3 N 5 , show many clusters with similar stoichiometry . Furthermore, the LDI analysis of bulk and PLD films of As‐S‐Se glasses also shows many clusters with similar stoichiometry . These results provide clear evidence that the spectra obtained by LDI/MALDI contain information about the structural fragments existing in solids.…”

Study of Cluster Anions Generated by Laser Ablation of Titanium Oxides: A High Resolution Approach Based on Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

“…Alternatively, mass spectrometry coupled to laser ablation (LA-MS) provides information on atomic and cluster species present in the gas phase. When considering the ionic fraction of species ejected in vacuum under laser irradiation, relevant information may be obtained on the atomic and high mass cluster species present in the gas phase above the target after laser-matter interactions [19][20][21].…”