Field of Expertise: Advanced Material Science

Organosilylgermane compounds as precursor for solution-liquid-solid synthesis of germanium nanowires
Mohammad Aghazadeh Meshgi, Peter Poelt, Christoph Marschner
09:40 - 10:00 Thursday 24 October 2013 HS II, Alte Technik

Synthesis of germanium nanowires with organosilylgermane compounds as precursor is a known process, but the synthesis via vapor-liquid-solid method requires temperatures above 300 oC.1,2 However, solution-liquid-solid (SLS) synthesis of germanium nanowires with bismuth catalyst at temperatures around 350 oC was reported but the precursor was GeI23.Due to easy release of elemental germanium from organosilylgermane compounds even at lower temperatures, this group of compounds demonstrates some advantages like low temperature synthesis and shorter reactions time in comparison to other germanium precursors for germanium nanowires synthesis. In addition SLS synthesis method does not require complex and expensive equipment and due to low temperature synthesis, application of cheaper catalysts like indium and bismuth nanoparticles as seeding agents is possible which in general reduces the production costs.

References:
(1) Hobbs, R. G.; Barth, S.; Petkov, N.; Zirngast, M.; Marschner, C.; Morris, M. A.; Holmes, J. D. J. Am. Chem. Soc. 2010, 132, 13742–13749.
(2) Hanrath, T.; Korgel, B. A. J. Am. Chem. Soc. 2002, 124, 1424–1429.
(3) Lu, X.; Fanfair, D. D.; Johnston, K. P.; Korgel, B. A. J. Am. Chem. Soc. 2005, 127, 15718–15719.