期刊
NANO LETTERS
卷 18, 期 6, 页码 3850-3856出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b01126
关键词
Flexoelectricity; in situ; transmission electron microscopy; lanthanide scandates
类别
资金
- U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-FG02-01ER45945]
There is a growing interest in the flexoelectric effect, since at the nanoscale it is predicted to be very large. However, there have been no direct observations of flexo-electric bending consistent with current theoretical work that implies strains comparable to or exceeding the yield strains of typical materials. Here we show a direct observation of extraordinarily large, two-dimensional reversible bending at the nanoscale in dysprosium scandate due to the converse flexoelectric effect, with similar results for terbium and Increasing gadolinium scandate. Within a transmission electron micro-scope, thin features bend up to 90 degrees with radii of curvature of about 1 mu m, corresponding to very large nominal strains. Analysis including independent experimental determination of the flexoelectric coefficient is semiquantitatively consistent with interpreting the results as due to flexoelectricity. These results experimentally demonstrate large flexoelectric bending at the nanoscale.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据