Effects of hydration on the mechanical response of individual collagen fibrils
Effects of hydration on the mechanical response of individual collagen fibrils
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DOI：
10.1063/1.2937001
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发表时间：
2008-06-09
影响因子：
4
通讯作者：
Thomson, Neil H.
中科院分区：
文献类型：
--
作者：
Grant, Colin A.;Brockwell, David J.;Thomson, Neil H.
用原子力显微镜对从牛跟腱制备的胶原原纤维进行了纳米压痕力学测试。在预期脱水的环境条件下，测定了原纤维的弹性模量为1.9 +/- 0.5 GPa，而在含水流体下，弹性模量下降了三个数量级，为1.2 +/- 0.1 MPa。在空气中，原丝沿轴向断裂，裂纹长度量化为d带周期性。原纤维的表观硬度估计在0.35-0.6 GPa之间。(C) 2008年美国物理研究所。
Collagen fibrils prepared from bovine Achilles tendon have been mechanically tested through nanoindentation by an atomic force microscope using force volume analysis. In ambient conditions where the fibrils are expected to be dehydrated, the elastic modulus was determined to be 1.9 +/- 0.5 GPa, while under aqueous fluid, it decreased by three orders of magnitude to 1.2 +/- 0.1 MPa. In air, fibril fracture occurred along the axis and the crack lengths were quantized to the D-banding periodicity. The apparent hardness of the fibrils was estimated to be in the range of 0.35-0.6 GPa. (C) 2008 American Institute of Physics.