title: Synthesis and characterization of Al2O3/SiO2 coaxial nanowire heterostructures with periodical twinning structures.
abstract: 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.
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Su
authors.forename: Xia
authors.initials: X
authors.lastname: Meng
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Chen
authors.forename: Qingtao
authors.initials: Q
authors.lastname: Zhou
authors.forename: Sen
authors.initials: S
authors.lastname: Li
authors.forename: Xuemei
authors.initials: X
authors.lastname: Liang
authors.forename: Yi
authors.initials: Y
authors.lastname: Feng