| 학회 |
한국재료학회 |
| 학술대회 |
2013년 봄 (05/23 ~ 05/24, 여수 엠블호텔(THE MVL)) |
| 권호 |
19권 1호 |
| 발표분야 |
B. 나노재료(Nanomaterials) |
| 제목 |
Characterization of porous BaTiO3 hollow nanofibers and its photoluminescence property in visible light |
| 초록 |
Porous BaTiO3 hallow nanofibers were fabricated by electrospinning and subsequent heat-treatment of as-spun nanofibers. From the observation of surface morphology using FESEM, BaTiO3 nanofibers displayed porous structure. HRTEM images revealed that the BaTiO3 nanofibers showed fine lattice fringe with d(110) value of 0.2789 nm. The X-ray diffraction results indicate that the porous BaTiO3 hallow nanofibers varied from amorphous phase at heat-treatment below 500°C to crystalline phase at heat-treatment over 700°C. Also, Raman spectroscopy results indicate porous BaTiO3 hallow nanofibers have tetragonal phase at heat-treatment over 700°C. XPS studies show BaTiO3 nanofibers contain surface defect or oxygen vacancy. In case of the BaTiO3 nanofibers heated at 500°C, Ti 2p3/2 peak revealed large amount of Ti3+, compared to heat-treatment at 700°C and 950°C. The results of PL with amorphous phase showed intense emission at 630 nm with broad visible emission. The intense wide emission band of high disordered BaTiO3 nanofibers probably results from oxygen vacancies, defects, and/or local bond distortion. On the base of PL results, it is suggested that the BaTiO3 nanofibers is one of the promising light-emitting materials as an optoelectronic devices. |
| 저자 |
Kui Woong Lee1, Jong-Won Yoon2
|
| 소속 |
1Nano Energy Conversion Materials Laboratory, 2Department of Advanced Materials Science and Engineering |
| 키워드 |
Barium titanate; Porous nanofiber; Electrospinning; Photoluminescence
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| E-Mail |
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