INDUCED PIEZOELECTRICITY IN ISOTROPIC BIOMATERIAL

被引:10
作者
ZIMMERMAN, RL [1 ]
机构
[1] UNIV SAO PAULO, INST FIS & QUIM SAO CARLOS, SAO CARLOS 13560, SP, BRAZIL
关键词
D O I
10.1016/S0006-3495(76)85778-5
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Isotropic material can be made to exhibit piezoelectric effects by the application of a constant electric field. For insulators, the piezoelectric strain constant is proportional to the applied electric field and for semiconductors, an additional out-of-phase component of piezoelectricity is proportional to the electric current density in the sample. The 2 induced coefficients are proportional to the strain-dependent dielectric constant (d.epsilon./dS + .epsilon.) and resistivity (d.rho./dS = .rho.), respectively. The latter is more important at frequencies such that .rho..epsilon..omega. < 1, often the case in biopolymers. Signals from induced piezoelectricity in nature may be larger than those from true piezoelectricity.
引用
收藏
页码:1341 / 1348
页数:8
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