期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 118, 期 2, 页码 733-738出版社
SPRINGER
DOI: 10.1007/s00339-014-8789-1
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资金
- Global Leading Technology Program of the Office of Strategic R&D Planning(OSP) - the Ministry of Commerce, Industry and Energy, Republic of Korea [10042421]
- Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea(NRF) - Ministry of Science, ICT and Future Planning(MSIP) [2010-00525]
- National Research Foundation of Korea(NRF) - Ministry of Education, Science and Technology [2012R1A1A2008870, 2012R1A2A2A04047240]
- KU Research Professor Program of Konkuk University
- Korea Evaluation Institute of Industrial Technology (KEIT) [10042421] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Multiwalled carbon nanotubes (MWCNTs)/ZnO heterostructures were synthesized by two different processes: (1) gas-phase transport (GPT) and nucleation of Zn powders and (2) solution-phase transport (SPT) chemical reaction of zinc nitrate solution on the MWCNTs. Transmission electron microscopy and X-ray diffraction analysis indicated that the ZnO nanostructures on the MWCNTs from the GPT and SPT processes were poly- and single-crystal hexagonal wurtzite structure, respectively. The major photoluminescence (PL) spectra of our MWCNT/ZnO hybrid, excited at 380 nm and 550 nm, were presented. The PL intensity of the MWCNT/ZnO coaxial nanostructures behaves differently depending on the ZnO synthesis methods on the MWCNTs. The MWCNT/ZnO heterostructures synthesized using the GPT process were more efficient than those synthesized by SPT process in enhancing the PL intensity around the near-band-edge emission region. However, the emission enhancement around defect region was mostly attributed to increase in the O vacancy concentration in the ZnO on the MWCNTs during the SPT process.
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