| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | G. 나노/박막 재료 분과 |
| 제목 | Piezoelectric phase transition of BaTiO3 1D-nanosturctures using M-shaped TiO2 nanorod bundles |
| 초록 | One-dimensional (1D) piezoelectric nanomaterials have been developed with tunable structures such as nanowires, nanorods, nanotubes for potential applications, however, those nanostructures have a critical problem of aggregation between each nanomaterials resulting poor and unreliable electric characteristics. In this study, vertically aligned M-shape TiO2 nanorod bundles on a conductive substrate were prepared as infrastructure converting to perovskite BaTiO3 compositions. Compared with BaTiO3 conversion rate (78.4%) of ㅁ-shaped TiO2 nanorod bundles, the M-shaped TiO2 nanorod bundles were found to exhibit higher conversion rate (92.3%) of BaTiO3. The conversion ratio was defined as Conversion ratio=(XRD peak (BaTiO3)/(XRD peak (TiO2) + XRD peak (BaTiO3)) where the representative peaks of TiO2 and BaTiO3 are shown as (002) at 62.8° and (110) at 31.3°, respectively. Further, the M-shaped TiO2 nanorod bundles accompanied less volume expansion with 62.3 % area density after the BaTiO3 conversion, which can role a unique parameter inducing high flexibility of piezoelectric nanomaterials. Finally, piezoelectric BaTiO3 1D arrays were properly synthesized on a conductive substrate via 2 step hydrothermal processes. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1C1B1010884) |
| 저자 | 장선민, 최문혁, 노병일, 고규진, 양수철 |
| 소속 | 동아대 |
| 키워드 | piezoelectric; nanorod; material conversion; one-dimensional growth |
