Giant piezoelectricity in oxide thin films with nanopillar structure

doi:10.1126/science.abb3209

GSTDTAP > 气候变化

DOI	10.1126/science.abb3209
	Giant piezoelectricity in oxide thin films with nanopillar structure
	Huajun Liu; Haijun Wu; Khuong Phuong Ong; Tiannan Yang; Ping Yang; Pranab Kumar Das; Xiao Chi; Yang Zhang; Caozheng Diao; Wai Kong Alaric Wong; Eh Piew Chew; Yi Fan Chen; Chee Kiang Ivan Tan; Andrivo Rusydi; Mark B. H. Breese; David J. Singh; Long-Qing Chen; Stephen J. Pennycook; Kui Yao
	2020-07-17
发表期刊	Science
出版年	2020
英文摘要	Piezoelectric materials are important as sensors and transducers for applications such as ultrasonics. Liu et al. discovered nanopillar regions in a sodium-niobium-oxide film that substantially improve the piezoelectric properties (see the Perspective by Bassiri-Gharb). These nanopillar regions reverse where the cations and anions are located in the crystal structure, with a distinctive boundary in between. This difference in structure results in a strain-sensitive polarity that enhances the piezoelectric properties in a chemically simple material. Science this issue p. [292][1]; see also p. [252][2] High-performance piezoelectric materials are critical components for electromechanical sensors and actuators. For more than 60 years, the main strategy for obtaining large piezoelectric response has been to construct multiphase boundaries, where nanoscale domains with local structural and polar heterogeneity are formed, by tuning complex chemical compositions. We used a different strategy to emulate such local heterogeneity by forming nanopillar regions in perovskite oxide thin films. We obtained a giant effective piezoelectric coefficient d33,f* of ~1098 picometers per volt with a high Curie temperature of ~450°C. Our lead-free composition of sodium-deficient sodium niobate contains only three elements (Na, Nb, and O). The formation of local heterogeneity with nanopillars in the perovskite structure could be the basis for a general approach to designing and optimizing various functional materials. [1]: /lookup/doi/10.1126/science.abb3209 [2]: /lookup/doi/10.1126/science.abc8007
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/284348
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Huajun Liu,Haijun Wu,Khuong Phuong Ong,et al. Giant piezoelectricity in oxide thin films with nanopillar structure[J]. Science,2020.
APA	Huajun Liu.,Haijun Wu.,Khuong Phuong Ong.,Tiannan Yang.,Ping Yang.,...&Kui Yao.(2020).Giant piezoelectricity in oxide thin films with nanopillar structure.Science.
MLA	Huajun Liu,et al."Giant piezoelectricity in oxide thin films with nanopillar structure".Science (2020).