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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.1
- 수록면
- 163 - 167 (5page)
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SnO2 nanofibers with various grain sizes ranging from 18.5 to 31.6 nm in diameter were fabricated byelectrospinning a polymeric solution and subsequent controlled calcination of the as-spun fibers. The cal-cined fibers were polycrystalline and composed of densely packed nano-sized SnO2 grains. The effect ofthe nanograin size on the optical bandgap of SnO2 nanofibers was examined by ultraviolet-visible spec-troscopy. The bandgap showed a strong dependence on the nanograin size. The bandgap decreased withincreasing nanograin size. Some calculations were performed to understand the relationship between theexperimentally obtained bandgaps of the SnO2 nanofibers and the theoretical ones. Quantum confinementand lattice strain of the SnO2 nanofibers are likely responsible for the bandgap shift. This suggests thatoptimization of the nanograin size is essential not only for achieving the required optical properties ofoxide nanofibers, but also to secure superior working properties of electronic devices that are fabricatedwith electrospinning-synthesized oxide nanofibers.
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