ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
SiC nanopowder has been formed using an original technological approach based ongrinding of bulk porous SiC nanostructures. The initial porous SiC nanostructures were obtained byanodization of n+-type 4H-SiC substrate in HF/Ethanol solution under UV illumination. Largesingle SiC nanoparticles (~ 30 nm in diameter) constituting the nanopowder have a porous structurewhich can be clearly visible. On the other hand, small single SiC nanoparticles (~ 4 nm in diameter)exhibit a clear crystalline structure. A broad and very intense luminescence band (400 – 900 nm)provided from the nanopowder corresponds to the radiative processes involving nanoparticlesurface states. A smaller photoluminescence peak centred at 358 nm may correspond to radiativerecombination of the photogenerated excitons confined in the individual and spatially separated 4HSiCnanoparticles
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.527-529.763.pdf
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