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Title: XAS/EXAFS studies of Ge nanoparticles produced by reaction between Mg{sub 2}Ge and GeCl{sub 4}

Abstract

We present results of an XAS and EXAFS study of the synthesis of Ge nanoparticles formed by a metathesis reaction between Mg{sub 2}Ge and GeCl{sub 4} in diglyme (diethylene glycol dimethyl ether). The progress of the formation reaction and the products formed at various stages in the processing was characterised by TEM and optical spectroscopy as well as in situ XAS/EXAFS studies using specially designed reaction cells. - Graphical abstract: Nano-Ge particles 2-10 nm in diameter were prepared by reaction between Mg{sub 2}Ge Zintl phase and GeCl{sub 4} in diglyme followed by capping with BuLi and extraction into hexane. We used synchrotron X-ray absorption spectroscopy (XAS) at the Ge K edge with analysis of the EXAFS region combined with room temperature photoluminescence and TEM to characterise the nature of the nanoparticles and model compounds and to follow the course of the reaction. A TEM image of the germanium nanoparticles is shown. Highlights: > In situ characteristaion of germanium nanoparticles. > X-ray spectroscopic technique development. > Improving quality of nanoparticles grown by metathesis route.

Authors:
 [1];  [2]; ;  [1];  [1]
  1. Department of Chemistry and Materials Chemistry Centre, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom)
  2. SUPA, School of Physics and Astronomy and Centre for Science at Extreme Conditions, University of Edinburgh, Mayfield Road, EH9 3JZ (United Kingdom)
Publication Date:
OSTI Identifier:
21580233
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 9; Other Information: DOI: 10.1016/j.jssc.2011.06.020; PII: S0022-4596(11)00346-X; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; FINE STRUCTURE; GERMANIUM; GERMANIUM CHLORIDES; METHYL ETHER; NANOSTRUCTURES; PARTICLES; PHOTOLUMINESCENCE; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X RADIATION; X-RAY SPECTROSCOPY; CHLORIDES; CHLORINE COMPOUNDS; ELECTROMAGNETIC RADIATION; ELECTRON MICROSCOPY; ELEMENTS; EMISSION; ETHERS; GERMANIUM COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IONIZING RADIATIONS; LUMINESCENCE; METALS; MICROSCOPY; ORGANIC COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; PHOTON EMISSION; RADIATIONS; SPECTROSCOPY

Citation Formats

Pugsley, Andrew J., Bull, Craig L., Sella, Andrea, Sankar, Gopinathan, and McMillan, Paul F., E-mail: p.f.mcmillan@ucl.ac.uk. XAS/EXAFS studies of Ge nanoparticles produced by reaction between Mg{sub 2}Ge and GeCl{sub 4}. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.06.020.
Pugsley, Andrew J., Bull, Craig L., Sella, Andrea, Sankar, Gopinathan, & McMillan, Paul F., E-mail: p.f.mcmillan@ucl.ac.uk. XAS/EXAFS studies of Ge nanoparticles produced by reaction between Mg{sub 2}Ge and GeCl{sub 4}. United States. doi:10.1016/j.jssc.2011.06.020.
Pugsley, Andrew J., Bull, Craig L., Sella, Andrea, Sankar, Gopinathan, and McMillan, Paul F., E-mail: p.f.mcmillan@ucl.ac.uk. Thu . "XAS/EXAFS studies of Ge nanoparticles produced by reaction between Mg{sub 2}Ge and GeCl{sub 4}". United States. doi:10.1016/j.jssc.2011.06.020.
@article{osti_21580233,
title = {XAS/EXAFS studies of Ge nanoparticles produced by reaction between Mg{sub 2}Ge and GeCl{sub 4}},
author = {Pugsley, Andrew J. and Bull, Craig L. and Sella, Andrea and Sankar, Gopinathan and McMillan, Paul F., E-mail: p.f.mcmillan@ucl.ac.uk},
abstractNote = {We present results of an XAS and EXAFS study of the synthesis of Ge nanoparticles formed by a metathesis reaction between Mg{sub 2}Ge and GeCl{sub 4} in diglyme (diethylene glycol dimethyl ether). The progress of the formation reaction and the products formed at various stages in the processing was characterised by TEM and optical spectroscopy as well as in situ XAS/EXAFS studies using specially designed reaction cells. - Graphical abstract: Nano-Ge particles 2-10 nm in diameter were prepared by reaction between Mg{sub 2}Ge Zintl phase and GeCl{sub 4} in diglyme followed by capping with BuLi and extraction into hexane. We used synchrotron X-ray absorption spectroscopy (XAS) at the Ge K edge with analysis of the EXAFS region combined with room temperature photoluminescence and TEM to characterise the nature of the nanoparticles and model compounds and to follow the course of the reaction. A TEM image of the germanium nanoparticles is shown. Highlights: > In situ characteristaion of germanium nanoparticles. > X-ray spectroscopic technique development. > Improving quality of nanoparticles grown by metathesis route.},
doi = {10.1016/j.jssc.2011.06.020},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 9,
volume = 184,
place = {United States},
year = {2011},
month = {9}
}