Laser ablation generation of clusters from As-Te mixtures, As-Te glass nano-layers and from Au-As-Te nano-composites. Quadrupole ion trap time-of- flight mass spectrometry

Varování

Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.

Autoři

ŠTĚPÁNOVÁ Vlasta PROKEŠ Lubomír SLAVÍČEK Pavel ALBERTI Milan HAVEL Josef

Rok publikování 2015
Druh Článek v odborném periodiku
Časopis / Zdroj Rapid Communications in Mass Spectrometry
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Doi http://dx.doi.org/10.1002/rcm.7193
Obor Analytická chemie, separace
Klíčová slova chalcogenide glass; Au-As-Te nano-composites; As-Te glass nano-layers; mass spectrometry (LDI QIT TOF MS); physical vapour deposition (PVD)
Popis

RATIONALE: Arsenic tellurides have found important applications in various fields of science, but only a few gold-arsenic tellurides have been reported. Laser ablation synthesis (LAS), a suitable method for the generation of new compounds, has been used to generate clusters from As-Te mixtures, an As-Te glass and Au-As-Te nano-composites.

METHODS: Chalcogenide glass nano-layers prepared via Physical Vapour Deposition – thermal evaporation were characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). LAS with laser desorption ionisation quadrupole ion trap time-of-flight mass spectrometry (LDI QIT TOFMS) was used for the generation and analysis of new AuxAsmTen clusters. The stoichiometry of the clusters was determined via isotopic envelope modelling.

RESULTS: A simple procedure for the preparation of the Au-As-Te nano-composite was developed. From As-Te mixtures only five binary AsmTen clusters were generated, while from a glass layer 10 binary AsmTen clusters were identified, because during the deposition of the glass the elements reacted with each other to form a complex three-dimensional (3D) structure. Using LAS on the Au-As-Te nano-composite leads to the formation of six unary Ten (n=1–6), 16 binary (AsmTen and AuxTen), and 31 ternary AuxAsmTen clusters.

CONCLUSIONS: LAS was demonstrated to be a useful technique for the generation of AuxAsmTen clusters in the gas phase. More AsmTen clusters were generated from the deposited glass layers than from As-Te mixtures. Most of the ternary AuxAsmTen clusters generated from the nano-composite are reported here for the first time.

Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.