| 학회 |
한국고분자학회 |
| 학술대회 |
2010년 봄 (04/08 ~ 04/09, 대전컨벤션센터) |
| 권호 |
35권 1호 |
| 발표분야 |
대학원생 구두발표 |
| 제목 |
Ultrahigh Density Array of Epitaxial Ferroelectric Nanoislands Using Block Copolymer Micelles |
| 초록 |
A ultrahigh density array of epitaxial PbTiO3 (PTO) nanoislands with uniform size was fabricated on a conducting substrate over a large area (cm2 scale) on Nb-doped SrTiO3 (STO) substrate by simple but robust method utilizing polystyrene-block-poly(4-vinylpridine) micelles. Each nanoisland has an average volume of 2.6 × 103 nm3 (a thickness of 7 nm and a diameter of 22 nm). Due to uniform nanoislands over a large area, an x-ray diffraction experiment could be successfully employed to analyze domain structures of PTO nanoislands. They showed well defined epitaxy on the substrate, which was also confirmed by high resolution transmission electron microscopy. All of the nanoislands existing in the entire area showed distinct piezoresponse which confirms the existence of ferroelectricity at this dimension. The results indicate that the critical size of ferroelectrics could be scaled-down further, and thus the density of ferroelectric devices would be much increased. |
| 저자 |
김영석1, 한희2, 김윤석3, 이우4, M. Alexe3, 백성기2, 김진곤1
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| 소속 |
1포항공대, 2포항공대 / 신소재공학과, 3Max Planck Institute of Microstructure Physics, 4한국표준과학(연) |
| 키워드 |
Block copolymer micelles; PbTiO3; ferroelectrics; nanodots; piezoresponse
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| E-Mail |
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