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Melting and optical properties of ZnO nanorods

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3 Author(s)
Su, Xin ; Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China ; Zhang, Zhengjun ; Zhu, Minmin

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We observed that, by heating in air, the ZnO nanorods could start to melt at a temperature of ∼750 °C, which is greatly reduced comparing with that of the bulk form. Prolonged annealing at this temperature resulted in partial melting of individual nanorods and the coalescence of the nanorods with their neighbors, leading to a great change in their optical properties, i.e., a new photoluminescence peak emerged at ∼468 nm. Further analysis indicated that the new photoluminescence is closely related to the melting and the coalescence of the ZnO nanorods which probably induced some defects by thermal annealing at this temperature.

Published in:

Applied Physics Letters  (Volume:88 ,  Issue: 6 )