TY  - JOUR
AU  - Havel, J.
AU  - Peña-Méndez, E.M.
AU  - Amato, F.
AU  - Panyala, N.R.
AU  - Buršíková, V.
T1  - 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
LA  - eng
PY  - 2014
SP  - 297
EP  - 304
T2  - Rapid Communications in Mass Spectrometry
SN  - 0951-4198
VL  - 28
IS  - 3
AB  - 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 AuC n+ (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.
DO  - 10.1002/rcm.6783
UR  - https://portalciencia.ull.es/documentos/5e3c397229995246bbf5f3b7
DP  - Dialnet - Portal de la Investigación
ER  -