Micro-Raman and infrared properties of SnO[sub 2] nanobelts synthesized from Sn and SiO[sub 2] powders.

Rutile structured SnO[sub 2] nanobelts have been synthesized from the mixture of Sn powders and SiO[sub 2] nanoparticle powders. Each nanobelt has a uniform width of about several hundred nanometers and a thickness of about tens of nanometers along its entire length. Micro-Raman spectrum measurement on the SnO[sub 2] nanobelts shows that the first-order Raman A[sub 1g] mode (632.9 cm[sup -1]) is very strong, and two weak Raman bands 498 and 694 cm[sup -1] seem to correspond to infrared (IR)-active longitudinal optical (LO) and transverse optical (TO) of A[sub 2u] modes. In addition, the IR spectrum of the SnO[sub 2] nanobelts shows the A[sub 2u] (LO) (701.9 cm[sup -1]) and E[sub u (1)] (TO) (634.5 cm[sup -1]) modes and one surface mode (565.2 cm[sup -1]). The IR-active bands in the Raman spectrum and the surface mode in IR spectrum, which may be due to the nanoscale morphology of the nanobelts. [ABSTRACT FROM AUTHOR]