期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 62, 期 -, 页码 209-227出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2013.09.021
关键词
Flexoelectricity; size effect; soft materials; biological membrane; nanoscale
资金
- NSF CMMI Grant [1161163]
- NSF IMI center IIMEC [0844082]
- M.D. Anderson Professorship
- NSF [CMMI-1238835]
- AFOSR [YIP-12]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0844082] Funding Source: National Science Foundation
Flexoelectricity and the concomitant emergence of electromechanical size-effects at the nanoscale have been recently exploited to propose tantalizing concepts such as the creation of apparently piezoelectric materials without piezoelectric materials, e.g. graphene, emergence of giant piezoelectricity at the nanoscale, enhanced energy harvesting, among others. The aforementioned developments pertain primarily to hard ceramic crystals. In this work, we develop a nonlinear theoretical framework for flexoelectricity in soft materials. Using the concept of soft electret materials, we illustrate an interesting nonlinear interplay between the so-called Maxwell stress effect and flexoelectricity, and propose the design of a novel class of apparently piezoelectric materials whose constituents are intrinsically non-piezoelectric. In particular, we show that the electret-Maxwell stress based mechanism can be combined with flexoelectricity to achieve unprecedentedly high values of electromechanical coupling. Flexoelectricity is also important for a special class of soft materials: biological membranes. In this context, flexoelectricity manifests itself as the development of polarization upon changes in curvature. Flexoelectricity is found to be important in a number of biological functions including hearing, ion transport and in some situations where mechanotransduction is necessary. In this work, we present a simple linearized theory of flexoelectricity in biological membranes and some illustrative examples. (C) 2013 Elsevier Ltd. All rights reserved.
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