Article ID Journal Published Year Pages File Type
1524595 Materials Chemistry and Physics 2011 5 Pages PDF
Abstract

A large amount of ultra-long single-crystalline SnO2 nanowires were successfully synthesized through a polymeric sol–gel approach followed by a post-annealing in a crucible covered with a lid. The experimental results indicate that the product is composed of tetragonal SnO2 nanowires, and moreover, their growth mechanism should arise from the self-catalyzed Sn-terminated polar surfaces due to the enrichment of Sn at the growth front of nanowires. In Raman scattering spectrum, in addition to three fundamental vibrational modes, some infrared (IR) active and surface phonon modes (SPM) are also observed due to size and shape confinement effects and surface disorder. Similarly, low frequency non-active IR and surface phonon mode absorptions are also observed in IR spectra.

► A large amount of ultra-long single-crystalline SnO2 nanowires were successfully synthesized through a polymeric sol–gel approach followed by a post-annealing. ► At the growth front of nanowires, the enrichment of Sn induces self-catalyzed Sn-terminated polar surface growth. ► In Raman scattering spectrum, in addition to three fundamental vibrational modes, some infrared (IR) active and surface phonon modes are also observed due to size and shape confinement effects and surface disorder. ► Similarly, low frequency non-active IR and surface phonon mode absorptions are also observed in IR spectra.

Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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