Fabrication and Properties of Ag-nanoparticles Embedded Amorphous Carbon Nanowire/CNT Heterostructures

Carbon nanotubes were subjected to doping with an energetic Ag ion beam, and the carbon nanotubes on the top of the array were transformed into amorphous carbon nanowires with embedded Ag-nanoparticles. The field emission characteristics of these nanowires were investigated. The minimum turn-on and...

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Bibliographic Details
Published inNanoscale research letters Vol. 5; no. 9; pp. 1449 - 1455
Main Authors Chen, Ke-fan, Deng, Jian-hua, Zhao, Fei, Cheng, Guo-an, Zheng, Rui-ting
Format Journal Article
LanguageEnglish
Published New York Springer New York 09.06.2010
Springer
Subjects
Chemistry and Materials Science
Materials Science
Molecular Medicine
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Carbon nanotube
Nanowire
Ion implantation
Field emission
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Summary:Carbon nanotubes were subjected to doping with an energetic Ag ion beam, and the carbon nanotubes on the top of the array were transformed into amorphous carbon nanowires with embedded Ag-nanoparticles. The field emission characteristics of these nanowires were investigated. The minimum turn-on and threshold fields were 0.68 and 1.09 V/μm, respectively, which were lower than those of the as-grown carbon nanotubes. This was probably because Ag-nanoparticles embedded in the carbon nanowires reduced the effective work function from 4.59 to 4.23 eV. Large doping amounts produced serious structural damage at the top of the nanowires and impaired the field emission characteristics.
ISSN:1931-7573
1556-276X
DOI:10.1007/s11671-010-9660-8