Structural and optical properties of ZnO nanorods by electrochemical growth using multi-walled carbon nanotube-composed seed layers |
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Authors: | Yeong Hwan Ko Myung Sub Kim Jae Su Yu |
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Affiliation: | (1) Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon-dong, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea |
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Abstract: | We reported the enhancement of the structural and optical properties of electrochemically synthesized zinc oxide ZnO] nanorod
arrays NRAs] using the multi-walled carbon nanotube MWCNT]-composed seed layers, which were formed by spin-coating the aqueous
seed solution containing MWCNTs on the indium tin oxide-coated glass substrate. The MWCNT-composed seed layer served as the
efficient nucleation surface as well as the film with better electrical conductivity, thus leading to a more uniform high-density
ZnO NRAs with an improved crystal quality during the electrochemical deposition process. For ZnO NRAs grown on the seed layer
containing MWCNTs (2 wt.%), the photoluminescence peak intensity of the near-band-edge emission at a wavelength of approximately
375 nm was enhanced by 2.8 times compared with that of the ZnO nanorods grown without the seed layer due to the high crystallinity
of ZnO NRAs and the surface plasmon-meditated emission enhancement by MWCNTs. The effect of the MWCNT-composed seed layer
on the surface wettability was also investigated. |
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Keywords: | ZnO nanorod arrays multi-walled carbon nanotubes electrochemical growth crystallinity photoluminescence |
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