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LASER DESORPTION IONISATION TIME-OF-FLIGHT MASS SPECTROMETRY (LDI TOFMS) OF CHALCOGENIDE GLASSES FROM PSEUDO-BINARY (GeSe2)100-x(SbSe3)x SYSTEM

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ŠÚTOROVÁ Katarína PROKEŠ Lubomír NAZABAL Virginie BOUŠKA Marek NĚMEC Peter HAVEL Josef

Rok publikování 2015
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Popis It has already been shown that LDI TOFMS is a powerful and useful technique to generate and study clusters of various solid materials including chalcogenide glasses[1], which are known due to their high (non)linear refractive indices, broad transmission window in IR spectral region, and photosensitivity to light exposure.[2] This advance material has broad applications in the fields such as infrared optics, electronics, micro-electronics, telecommunication systems and medicine. Mass spectra generated from (GeSe2)100-x(Sb2Se3)x glasses’ powder samples are quite complex with several clusters overlap. Stoichiometry of clusters detected in plasma was determined via comparison of experimental isotopic envelopes with theoretical models.[3] In positive ion mode, Sb+, Se2+, Sb3+, GeSec+, (c = 1-2), SbSec+ (c = 1-2), Sb2Sec+ (c = 1-4), GeaSb3+, Sb3Sec+ (a = 1-4, c = 1-4), Sb3Se5+, GeSbbSe+ (b = 4-5), GeSbSe2+, and Ge9Sb2Sec+ (c = 5-7) entities were detected. In negative ion mode, Sec- (c = 2-3), SbSec- (c = 1-3), Sb2Sec- (c = 3-4), and GeSbSec- (c = 3-5) entities were identified. Some of clusters such as GeSec+ (c = 1-2), SbSe3-, Sb2Sec+ (c = 1-4), and Sb2Sec- (c = 3-4) identified by LDI TOFMS, could be considered to be structural fragments of the glasses’ original structure. This was also proved by Raman spectroscopy.[3]
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