Laser ablation synthesis of new gold tellurides using tellurium and nanogold as precursors. Laser desorption ionisation time-of-flight mass spectrometry

Authors

  • Katarína Švihlová,

    1. Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
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  • Lubomír Prokeš,

    1. Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
    2. Department of Physical Electronics, Faculty of Science, Masaryk University, Brno, Czech Republic
    3. CEPLANT, R&D Centre for Low-Cost Plasma and Nanotechnology Surface Modifications, Masaryk University, Brno, Czech Republic
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  • Dana Skácelová,

    1. Department of Physical Electronics, Faculty of Science, Masaryk University, Brno, Czech Republic
    2. CEPLANT, R&D Centre for Low-Cost Plasma and Nanotechnology Surface Modifications, Masaryk University, Brno, Czech Republic
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  • Eladia María Peña-Méndez,

    1. Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Chemistry, University of La Laguna, La Laguna, Tenerife, Spain
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  • Josef Havel

    Corresponding author
    1. Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
    2. Department of Physical Electronics, Faculty of Science, Masaryk University, Brno, Czech Republic
    • CEPLANT, R&D Centre for Low-Cost Plasma and Nanotechnology Surface Modifications, Masaryk University, Brno, Czech Republic
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Correspondence to: J. Havel, Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5/A14, 625 00 Brno, Czech Republic.

E-mail: havel@chemi.muni.cz

Abstract

RATIONALE

Only a few gold tellurides are known. However, Laser Ablation Synthesis (LAS) using Laser Desorption Ionisation (LDI) time-of-flight mass spectrometry (TOF MS) has high potential for the generation of new compounds.

METHODS

LDI of nanogold-Te conjugate using a nitrogen laser 337 nm was applied while the mass spectra were recorded in positive and negative ion modes using a quadrupole ion trap-TOF mass spectrometer equipped with a reflectron. Diffuse coplanar surface barrier discharge was applied for the plasma treatment of glass and silicon surfaces.

RESULTS

A form of nanogold-Te conjugate was prepared and found suitable for LAS of gold tellurides. Several new AumTen (m = 1–11; n = 1–4) clusters were identified. An excess of nanogold and chloride or an excess of auric acid caused the formation of mixed AumTenClx clusters. The nanogold-Te conjugate can be deposited from an aqueous suspension onto glass while the deposition is strongly enhanced if the surface is modified by plasma.

CONCLUSIONS

LDI of nanogold-Te conjugate is a suitable procedure for the generation of new gold telluride clusters. Treatment of borosilicate glass with a diffuse coplanar surface barrier discharge strongly enhances the deposition of gold tellurides on glass while limited adsorption on a silicon surface was observed. Copyright © 2013 John Wiley & Sons, Ltd.

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