期刊
NANOTECHNOLOGY
卷 20, 期 15, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/15/155603
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资金
- Korea Research Foundation [KRF-2006-005-J02802, KRF-2006-005-J02803]
- Korea Science and Engineering Foundation [R01-000-20757-0]
- National Research Foundation of Korea [과C6B2010, 2006-005-J02802, 2006-005-J02803, 2007-0055893] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Well-aligned ultralong ZnO nanorod arrays with a length of 10 mu m have been synthesized on glass substrates using a preheating hydrothermal method. The diameter of the nanorods is in the range from 50 to 80 nm, and the aspect ratio and alignment can be simply controlled by varying the preheating time. Based on the evolution of aspect ratio with preheating time, a possible growth mechanism was proposed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the nanostructures are well oriented with the c-axis perpendicular to the substrate. The photoluminescence (PL) spectrum of the as-grown ZnO nanostructure reveals a near-band-edge (NBE) emission peak and a yellow emission, and the origin of yellow emission was confirmed to be from the absorbed hydroxyl group. The ultralong nanorod arrays made in solution have a desirable diameter, length, density and orientation for ordered nanodevice applications.
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