title: Structural and cathodoluminescence of Sb-doped SnO2 nanostructures.
abstract: High density Sb-doped SnO2 nanobelts and beak-like nanorods were synthesized on alumina substrates using thermal evaporation. X-ray diffraction (XRD) pattern shows that both the nanobelts and beak-like nanorods are single crystals with the tetragonal rutile structure. Transmission electron microscopy (TEM) images show that the nanobelts grow along the [110] direction, but the nanorods grow with an abrupt change from the [101] direction to the [301] direction. X-ray photoelectron spectroscopy (XPS) analysis shows that the Sb 3d 3/2 peak of not fully oxidized beak-like nanorods shifts from 540.5 eV to 535.4 eV, and the Sn 3d 3/2 peak also shifts from 496.3 eV to 492.8 eV. Room temperature cathodoluminescence (CL) measurements show that both the nanobelts and beak-like nanorods exhibit blue and orange emissions that are related to the interstitial defects and oxygen deficiencies. The comparative study of CL measurements between nanobelts and beak-like nanorods demonstrate that the optical properties can be modified by altering the oxygen deficiencies.
authors.affiliation: Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.
authors.forename: Yu-Hung
authors.initials: YH
authors.lastname: Lin
authors.forename: Chun-Cha
authors.initials: CC
authors.lastname: Kuo
authors.forename: Uei-Shin
authors.initials: US
authors.lastname: Chen
authors.forename: Jyh-Ming
authors.initials: JM
authors.lastname: Wu
authors.forename: Yee-Shyi
authors.initials: YS
authors.lastname: Chang
authors.forename: Han C
authors.initials: HC
authors.lastname: Shih