Carbon-encapsulated metal nanoparticles deposited by plasma enhanced magnetron sputtering

Title
Carbon-encapsulated metal nanoparticles deposited by plasma enhanced magnetron sputtering
Authors
문명운Wei Dai
Keywords
nanoparticle; catalyst
Issue Date
2018-04
Publisher
Vacuum
Citation
VOL 150-128
Abstract
Carbon-encapsulated gold nanoparticles (CEGNs) were synthesized by plasma enhanced magnetron sputtering using C2H2 and Ar mixtures as the precursor. The morphology, microstructure and optical property of the CEGNs were characterized using TEM, SEM, and UV-Vis absorption spectrum. The results show that the gold NPs with narrow size distribution ranging from 7 nm to 20 nm were encapsulated by amorphous carbon nanospheres. The fraction of C2H2 in the gas mixture of C2H2 and Ar seemed to have a significant influence on the gold particle size and distribution of the as-made CEGN5. As the fraction of the C2H2 increased from 5% to 10%, the average particle size decreased from about 13 nm to 7 nm and the carbon nanospheres with single gold NPs core evolved to the carbon chain with multi-cores. In addition, carbon-encapsulated silver nanoparticles (CESNs) were also prepared by the same method. This indicates that the plasma enhanced magnetron sputtering may be one of the best ways for the deposition of the carbon-encapsulated metal nanoparticles (CEMNs). The UV-Vis absorption spectra of the CEGN5 and CESNs reveal strong absorption bands due to the surface plasma resonance of the nanoparticles, implying that the as-made CEMNs could be applied in optical limiting devices.
URI
http://pubs.kist.re.kr/handle/201004/68178
ISSN
0042-207X
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KIST Publication > Article
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