| 학회 |
한국재료학회 |
| 학술대회 |
2009년 가을 (11/05 ~ 11/06, 포항공과대학교) |
| 권호 |
15권 2호 |
| 발표분야 |
B. Nanomaterilas Technology(나노소재 기술) |
| 제목 |
The photoluminescence properties of TiO2-sheathed ZnSe nanowires |
| 초록 |
ZnSe nanowires have been synthesized by thermal evaporation of ZnSe powder on gold–coated Al2O3 (0001) substrates and then sheathed with TiO2 by sputtering. Our results show that sheathing Zn nanowires with thin TiO2 layers can significantly enhance the photoluminescence (PL) emission intensity. The PL peak intensity of the ZnSe/TiO2 coaxial nanowires prepared by sputter-deposition of TiO2 for 1.5 min on ZnSe nanowires and then annealing at 300 oC for 5 min in a vacuum furnace is about 30 times as high as that of ZnSe nanowires. XPS analysis results suggest that the PL enhancement is attributed to increases in the concentrations of deep levels such as oxygen and titanium interstitials as well as the density of interface states. The PL emission of ZnSe nanowires is also enhanced by thermal annealing whereas that of TiO2-sheathed ZnSe nanowires is degraded. Annealing in an argon atmosphere is more effective in enhancing the PL emission of ZnSe nanowires than annealing in an oxygen atmosphere. |
| 저자 |
이종무, 이정근
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| 소속 |
인하대 |
| 키워드 |
Photoluminescence; ZnSe nanowires; ZnSe/TiO2 Coaxial nanowires; Branch nanowires; Thermal evaporation |
| E-Mail |
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