The synthesis and growth mechanism of bamboo-like In2O3 nanowires.
Bamboo-like In(2)O(3) nanowires are successfully synthesized at 850 degrees C by a simple thermal evaporation method with an Au catalyst. The morphology of In(2)O(3) nanowires is controlled by the N(2) flow rate. Three different morphologies-straight, bamboo-like, and bent and tangled-are obtained under N(2) flow rates of 500, 700, and 1000 sccm, respectively. A possible growth mechanism of the bamboo-like In(2)O(3) nanowires is proposed. The bamboo-like In(2)O(3) nanowires consist of a stem and nodes, which are formed by rapid precipitation and oxidation processes of indium from an In-rich Au-In alloy at the bottom of an Au catalyst during their growth. Low-temperature photoluminescence of the In(2)O nanowires shows a sharp blue emission at 440 nm and a broad orange emission centered at 620 nm. The possible origin of the orange emission is discussed.
Jeong
Jong Seok
JS
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan. jsjeong@tagen.tohoku.ac.jp
Lee
Jeong Yong
JY