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Structural and Optical Characteristics of Crystalline Silicon Carbide Nanoparticles Synthesized by Carbothermal Reduction
Author(s) -
Kim Kwang Joo,
Lee Seungho,
Lee Jung Han,
Roh MyongHoon,
Lim KwangYoung,
Kim YoungWook
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02913.x
Subject(s) - carbothermic reaction , materials science , nanoparticle , raman spectroscopy , silicon carbide , photoluminescence , silicon , crystallinity , carbon fibers , carbide , analytical chemistry (journal) , chemical engineering , nanotechnology , composite material , chemistry , metallurgy , optoelectronics , organic chemistry , physics , engineering , composite number , optics
Silicon carbide (SiC) nanoparticles were successfully synthesized by using carbothermal reduction method. Nanoparticles with zincblende structure (3C–SiC) could be prepared using polysiloxane as silicon source and phenol resin (MH) or xylene resin (YN) as carbon source. The sample YN has an average grain size of 22 nm, larger than that of the sample MH (8 nm). Raman spectroscopy revealed that all nanoparticle samples contain graphitic surface carbon layers. Oxygen contamination on the nanoparticle surface could be reduced by postfluorine treatment (MH‐F). But the sample MH‐F showed reduced SiC crystallinity compared with the sample MH. The nanoparticle samples exhibited an intensive emission band in the blue region observed by photoluminescence (PL) spectroscopy. The band‐gap energy of the nanoparticle samples is estimated to be ∼3 eV from the PL spectra, blueshifted by ∼0.6 eV from that of bulk 3C–SiC due to the quantum confinement effect.