Synthesis and characterization of Al2O3/SiO2 coaxial nanowire heterostructures with periodical twinning structures.
Al2O3/SiO2 coaxial nanowire heterostructures were synthesized on a silicon substrate by a simple thermal evaporation method. The structure and morphology of the as-synthesized nanostructure were characterized using scanning electron microscopy and transmission electron microscopy. The growth of Al2O3/SiO2 coaxial nanowire heterostructures follows a vapor-solid (VS) process. Studies indicate that typical nanostructure consists of single twinning-crystalline Al2O3 nanowires (core) with diameter of about 50 nm and amorphous SiO2 shell. Photoluminescence properties were also investigated at room temperature. The photoluminescence spectrum reveals the product has a blue emission band and two UV emission bands.
Su
Yong
Y
School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China.
Meng
Xia
X
Chen
Yiqing
Y
Zhou
Qingtao
Q
Li
Sen
S
Liang
Xuemei
X
Feng
Yi
Y