Journal
MATERIALS LETTERS
Volume 104, Issue -, Pages 41-43Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2013.04.012
Keywords
Germanium oxide aerogel; Nanocrystalline materials; Luminescence
Funding
- China Academy of Engineering Physics [20110302059, 2012A0302015, 2012B0302050]
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In the present paper, we have prepared germanium oxide aerogel using the sol gel method followed by CO2 supercritical drying. Scanning electron microscopy showed a fine microstructure of the as-prepared aerogel. Results from the nitrogen adsorption and desorption data exhibited that the aerogel had attractive specific surface area and typical pore size distribution of aerogel. X-ray diffraction indicated that the aerogel was composed of nano-crystals with hexagonal structure. X-ray photoelectron spectroscopy confirmed the existence of oxygen vacancies. At room temperature, interesting strong blue luminescence was observed at 425 nm under excitation wavelength at 280 nm. We proposed an explanation for the phenomenon. (C) 2013 Elsevier B.V. All rights reserved.
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