Alkyl-terminated crystalline Ge nanoparticles prepared from NaGe: Synthesis, functionalization and optical properties

High purity NaGe was directly prepared by a low-temperature reaction of NaH and Ge. The product was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy. This material is a useful starting reagent for the preparation of G...

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Bibliographic Details
Published in:Journal of solid state chemistry 2008-07, Vol.181 (7), p.1628-1633
Main Authors: Ma, Xuchu, Wu, Fengyi, Kauzlarich, Susan M.
Format: Article
Language:English
Subjects:
FOURIER TRANSFORMATION
Functionalization
Ge nanoparticles
GERMANIUM
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
NANOSTRUCTURES
OPTICAL PROPERTIES
PARTICLES
PHOTOLUMINESCENCE
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SODIUM HYDRIDES
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
X-RAY DIFFRACTION
Zintl salt NaGe
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Description
Summary:High purity NaGe was directly prepared by a low-temperature reaction of NaH and Ge. The product was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy. This material is a useful starting reagent for the preparation of Ge nanoparticles. Hydrogen-terminated germanium (Ge) nanoparticles were prepared by reaction of NaGe with NH 4Br. These Ge nanoparticles could be prepared as amorphous or crystalline nanoparticles in quantitative yields and with a narrow size distribution. The nanoparticles were functionalized via thermally initiated hydrogermylation with 1-eicosyne, CH 3(CH 2) 17C≡CH to produce alkyl-terminated Ge nanoparticles. The modified Ge nanoparticles were characterized by powder XRD, transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) and Raman spectroscopy, and photoluminescence (PL) spectroscopy. The alkyl-functionalized Ge nanoparticles can be expected to have promising applications in many technological and biological areas. XRD pattern of crystalline Ge nanoparticles obtained by solid-state process and TEM image of alkyl-terminated crystalline Ge nanoparticles.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2008.06.018