Observation of mechanical fracture and corresponding domain structure changes of polycrystalline PbTiO3 nanotubes |
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| Authors: | Hyunwoo Choi Seungbum Hong Yunseok Kim Myungjun Kim Tae‐Hyun Sung Hyunjung Shin Kwangsoo No |
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| Affiliation: | 1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305‐701, Korea;2. Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA;3. Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany;4. School of Advanced Materials Engineering, Kookmin University, Seoul 136‐732, Korea;5. Department of Electrical Engineering, Hanyang University, 17 Haengdang‐dong, Seongdong‐gu, Seoul 133‐791, Korea |
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| Abstract: | ![]()
PbTiO3 (PTO) nanotubes (NTs) were synthesized at various temperatures by gas phase reaction between PbO gas and anatase TiO2 NTs and characterized by piezoresponse force microscopy (PFM). PTO ferroelectric phase was synthesized at as low as 400 °C as evidenced by PFM domain images and piezoresponse hysteresis loop measurement. Furthermore, the PTO NTs fabricated at above 500 °C underwent mechanical fracture through development of nanocracks due to grain growth, leading to ferroelectric domains with larger size and lower aspect ratio. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | ferroelectrics nanotubes domains fracture piezoresponse force microscopy |
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