Laser ablation synthesis of new gold carbides. From gold-diamond nano-composite as a precursor to gold-doped diamonds. Time-of-flight mass spectrometric study

Authors

  • 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
    3. CEPLANT, R&D Centre for Low-cost Plasma and Nanotechnology Surface Modifications, Masaryk University, Brno, Czech Republic
    • 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

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  • Eladia Maria 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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  • Filippo Amato,

    1. Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
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  • Nagender Reddy Panyala,

    1. Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
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  • Vilma Buršíková

    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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Abstract

RATIONALE

Gold carbides can be produced via laser ablation synthesis (LAS) from mixtures of nano-gold (NG) and various carbonaceous materials. The nano-composite of nano-gold (NG) and nano-diamond (ND) might represent a promising precursor for the generation of new gold carbides.

METHODS

Time-of-flight mass spectrometry (TOF MS), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX) were used. The stoichiometry of clusters was determined via modelling of the isotopic patterns and MSn analysis.

RESULTS

A simple procedure for the preparation of ND-NG nano-composite was developed using NG and ND. The formation of AuCn+ (n = 1–11, 18), Au2Cn+ (n = 1–16) and Au3Cn+ (n = 1–10) clusters during LAS of the nano-composite was proved. Structures of gold carbides are proposed and discussed. Diamonds-containing AumCn+ (m = 1–3, n = 10, 14, 18, 22) clusters might be not carbides but endohedral supramolecular complexes Aum@Cn+ i.e., 'gold-doped' diamonds.

CONCLUSIONS

TOF MS was shown to be a useful technique for following the formation of gold carbides in the gas phase. Clusters and 'gold-doped' diamonds generated might inspire synthesis of new Au-C materials with hardly predictable, unusual properties. Copyright © 2013 John Wiley & Sons, Ltd.

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