Structural and optical properties of tin oxide branched nanostructures.
Branched nanostructures of tin oxide (SnO2) have been synthesized by Vapor-Liquid-Solid (VLS) mechanism using a gold catalyst in the temperature range of 800-850 degrees C under an ambient gas flow of 200 sccm. The microstructural and the optical properties of the as prepared products have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), micro-Raman, and photoluminescence (PL) studies. SnO2 branches with a rutile phase are found to have a preferential orientation along (101). Typical lengths of these branches are found to be approximately 3-5 microm and diameters in the range of 50-100 nm. Selected area electron diffraction (SAED) pattern shows that the SnO2 branches have a tetragonal cross section with [101] crystal direction. A Raman line at 631 cm(-1) (Sn-O bond) is obtained in the micro Raman spectra. Low temperature PL spectrum shows a strong green emission band near 506 nm.
Jeedigunta
Sathyaharish
S
Nanomaterials and Nanomanufacturing Research Center, University of South Florida, Tampa, FL 33620, USA.
Singh
Manoj K
MK
Kumar
Ashok
A
Zekri
Souheil
S
Bumgarner
John
J
Rossie
Benjamin
B
D003460:Crystallization / Q000379:methods*; D008027:Light; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D017971:Tin Compounds / Q000737:chemistry* / Q000528:radiation effects
D017971:Tin Compounds; C045358:stannic oxide