Germanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxide
Krstic V, Collins G, Kolesnik M, Krstic V, Holmes JD (2010)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2010
Journal
Book Volume: 22
Pages Range: 5235-5243
Journal Issue: 18
DOI: 10.1021/cm1012137
Abstract
Ge nanowires seeded from Au nanoparticles capped with fluorothiolate ligands were synthesized in supercritical carbon dioxide (sc-CO2) by the thermal decomposition of diphenylgermane (DPG) at a temperature of 380 °C and a pressure of 25.7 MPa. Both perfluorinated and semifluorinated capped Au nanoparticles acted as effective catalysts for growing Ge nanowires, with mean diameters of 11 nm (σ = 2.8) and 14 nm (σ = 3.5), respectively. The mean diameter of the Ge nanowires grown from the fluorous-capped Au nanoparticles were considerably smaller than those synthesized from dodecanethiol-capped nanoparticles in sc-toluene, under the same reaction conditions, i.e., 28 nm and σ = 10.3. Differences in the ligand conformations on the surface of the Au nanoparticles and phase separation of the fluorocarbon/CO2 and hydrocarbon/toluene systems gave rise to greater steric stabilization of the fluorous-capped Au nanoparticles in CO2, resulting in small diameter nanowires with a relatively narrow size distribution. Electrical analysis of the nanowires showed them to be p-type (hole) semiconductors.
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APA:
Krstic, V., Collins, G., Kolesnik, M., Krstic, V., & Holmes, J.D. (2010). Germanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxide. Chemistry of Materials, 22(18), 5235-5243. https://doi.org/10.1021/cm1012137
MLA:
Krstic, Vojislav, et al. "Germanium nanowire synthesis from fluorothiolate-capped gold nanoparticles in supercritical carbon dioxide." Chemistry of Materials 22.18 (2010): 5235-5243.
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