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Determination of the elastic modulus of native collagen fibrils via radial indentation
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) AFM image of a typical large scale image of a collagen fibril with cross section taken along the length of this fibril highlighting the banding pattern. The fibril diameter varies along its length, as expected for fibrils derived from C. frondosa. (b) Higher resolution image. The fibril direction can be seen in the leading and retracting angles along the gap—black and white arrows, respectively.

Image of FIG. 2.
FIG. 2.

(a) Sample force traces on glass (dashed line) and on a collagen fibril (solid line). represents the indentation of the relatively soft fibril. (b) Reduced elastic modulus plotted vs indentation scaled by tip radius (. The nonlinearly increasing tail at large results from the influence of the hard substrate. (c) plotted vs fibril diameter. The reduced modulus becomes relatively constant for fibril diameters .

Image of FIG. 3.
FIG. 3.

(Color online) Collagen fibril before (left) and after (right) a high strain experiment. Note the indentation in the figure on the right. The fibril diameter was .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Determination of the elastic modulus of native collagen fibrils via radial indentation