RT Journal Article
T1 Thermal growth and structural and optical characterization of indium tin oxide nanopyramids, nanoislands, and tubes
A1 Maestre Varea, David
A1 Cremades Rodríguez, Ana Isabel
A1 Piqueras De Noriega, Francisco Javier
A1 Gregorati, Luca
AB In-doped SnO_2 microtubes as well as Sn-doped In_2O_3 (ITO) nano- and microislands have been grown by thermal treatment of compacted SnO_2-In_2O powders under argon flow at 1350 degrees C in a catalyst-free process. The SnO_2 tubes contain about 1 at. % of In, even when the In content in the starting mixture was as high as 52 at. %. However, the ITO nanoislands and nanopyramids, grown preferentially on the faces and edges of the tubes, present an In content up to six times higher than the tubes. Spatially resolved cathodoluminescence shows a higher emission from the Sn-rich structures, so that the In-rich ITO nanoislands show dark contrast in the CL images. CL spectra show that the main emission bands in both, Sn-rich and In-rich, structures, are related to oxygen deficiency. X-ray photoelectron spectroscopy shows differences between the tubes and the nanoislands in the O (1s) spectral region. In particular, a component at 531.9 eV of the O (1s) signal appears enhanced in the In-rich islands.
PB American Institute of Physics
SN 0021-8979
YR 2008
FD 2008-05-01
LK https://hdl.handle.net/20.500.14352/50801
UL https://hdl.handle.net/20.500.14352/50801
LA eng
NO © 2008 American Institute of PhysicsThis work was supported by MEC (Project No. MAT2006-01259).
NO MEC
DS Docta Complutense
RD 6 abr 2025