A study of piezoelectric and mechanical anisotropies of the human cornea
A study of piezoelectric and mechanical anisotropies of the human cornea
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DOI：
10.1016/s0956-5663(02)00144-6
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发表时间：
2003-04-01
影响因子：
12.6
通讯作者：
Kramer, P
中科院分区：
文献类型：
--
作者：
Jayasuriya, AC;Ghosh, S;Kramer, P
研究了人角膜的压电特性和动态力学特性随干燥时间的变化。正如预期的那样，发现压电系数d（31）和杨氏模量Y对含水量极其敏感。d（31）随角膜组织脱水而降低，Y随脱水而升高。虽然这些结果是显著的，但角膜所表现出的前所未有的机械和机电各向异性的发现是本研究的主要发现，并表明构成角膜的胶原纤维是高度定向的。在本研究中观察到的角膜的压电响应是：从平均压电系数值2250 pC/N开始的对角切割样品，接着是平均起始值约为600 pC/N的垂直切割样品，最后是平均起始值约为200 pC/N的水平切割样品。(C)2002 Elsevier Science B. V.保留所有权利。
The piezoelectric and dynamic mechanical properties of human cornea have been investigated as a function of drying time. As expected, the piezoelectric coefficient, d(31), and the Young's modulus, Y, were found to be extremely sensitive to water content. d(31) decreased with dehydration of the corneal tissue and Y increased with dehydration. While these results are significant, the discovery of the unprecedented mechanical and electromechanical anisotropy exhibited by the cornea are the major findings of this study and indicate that the collagen fibrils comprising the cornea are highly oriented. The piezoelectric responses of corneas observed in this study are: diagonally cut samples starting at an average piezoelectric coefficient value of 2250 pC/N, followed by the vertically cut samples, with an average starting value of about 600 pC/N and finally the horizontally cut samples with an average starting value of about 200 pC/N. (C) 2002 Elsevier Science B.V. All rights reserved.