期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 22, 页码 19510-19514出版社
AMER CHEMICAL SOC
DOI: 10.1021/am506629g
关键词
2D perovskite nanosheet; nanodielectric; thermal stability; high-temperature capacitor; in situ characterization
资金
- World Premier Research Institute (WPI Initiative in Materials Nanoarchitectonics), MEXT, CREST, JST
- JSPS, Japan
We investigated high-temperature dielectric responses of high-kappa perovskite nanosheet (Ca2Nb3O10), an important material platform for postgraphene technology and ultrascale electronic devices. Through in situ characterizations using conducting atomic force microscopy, we found a robust high-temperature property of Ca2Nb3O10 nanosheet even in a monolayer form (similar to 2 nm). Furthermore, layer-by-layer assembled nanocapacitors retained both size-free higher characteristic (similar to 200) and high insulation resistance (similar to 1 x 10(-7) A/cm(2)) at high temperatures up to 250 degrees C. The simultaneous improvement of er and thermal stability in high-kappa nanodielectrics is of critical technological importance, and perovskite nanosheet has great potential for a rational design and construction of high-temperature capacitors.
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