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000890272 1001_ $$00000-0003-4741-6882$$aLi, Luying$$b0$$eCorresponding author
000890272 245__ $$aAtomic scale study of the oxygen annealing effect on piezoelectricity enhancement of (K,Na)NbO 3 nanorods
000890272 260__ $$aLondon ˜[u.a.]œ$$bRSC$$c2020
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000890272 520__ $$aWith the increasing requirement of developing non-toxic piezoelectric materials, an alkaline niobate-based perovskite solid (K,Na)NbO3 (KNN) has been intensively studied. Promising piezoelectric properties are reported, which are mostly achieved by adding other elements, or simply varying the K/Na ratio. It is found that KNN nanorods grown on conductive Nb-doped SrTiO3 (STO) substrates show enhanced piezoelectric properties after annealing at 800 °C for 12 h [Y. He, Z. Wang, W. Jin, X. Hu, L. Li, Y. Gao, X. Zhang, H. Gu and X. Wang, Appl. Phys. Lett., 2017, 110, 212904]. However, the underlying mechanism for property enhancement at the atomic scale is not clearly revealed. In this study, comprehensive transmission electron microscopy techniques are utilized focusing on the atomic scale study of the interfacial composition, structures, strain, dipolar displacement vectors and their variations along the interface normal of the as-grown and annealed KNN nanorods. The results indicate phase transformation during annealing, and a larger spontaneous polarization within each unit cell of the annealed KNN nanorods, which lead to an overall enhancement of the piezoelectric properties. These results would be very beneficial for advanced nanogenerators and sensors with enhanced piezoelectric properties.
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000890272 7001_ $$0P:(DE-HGF)0$$aHu, Xiaokang$$b1
000890272 7001_ $$0P:(DE-Juel1)145711$$aJin, Lei$$b2
000890272 7001_ $$0P:(DE-HGF)0$$aHe, Yahua$$b3
000890272 7001_ $$0P:(DE-HGF)0$$aJia, Shuangfeng$$b4
000890272 7001_ $$0P:(DE-HGF)0$$aSheng, Huaping$$b5
000890272 7001_ $$0P:(DE-HGF)0$$aCheng, Yongfa$$b6
000890272 7001_ $$0P:(DE-Juel1)165794$$aLi, Li$$b7
000890272 7001_ $$aWang, Zhao$$b8
000890272 7001_ $$0P:(DE-HGF)0$$aGu, Haoshuang$$b9
000890272 7001_ $$00000-0002-0356-3306$$aZhu, Yinlian$$b10
000890272 7001_ $$0P:(DE-HGF)0$$aWang, Jianbo$$b11
000890272 7001_ $$00000-0003-1905-9531$$aGao, Yihua$$b12
000890272 773__ $$0PERI:(DE-600)2702245-6$$a10.1039/D0TC03152F$$gVol. 8, no. 44, p. 15830 - 15838$$n44$$p15830 - 15838$$tJournal of materials chemistry / C$$v8$$x2050-7534$$y2020
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000890272 8564_ $$uhttps://juser.fz-juelich.de/record/890272/files/Lei%20Jin%20preprint.pdf$$yPublished on 2020-09-30. Available in OpenAccess from 2021-09-30.
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