Atomic Force Microscopy on Biological Materials Related to Pathological Conditions

Table 1

Typical examples of Young’s modulus values of collagen in the literature.

References	Young’s modulus on collagen
	Collagen source	Contact model used	Young’s modulus values (GPa)
[17]	Type I collagen from bovine Achilles tendon	Oliver & Pharr model	0.74 - 1.43
[131]	Type I atelocollagen from calf skin	Hertz model
[11]	Type I collagen from bovine Achilles tendon	Hertzian model, modified for cylindrical sample	1.2 - 2.2
[133]	Type I collagen fibrils from rat tail tendons	Oliver & Pharr model	3.75 - 11.5
[130]	Type I collagen fibrils from calf skin	Hertz model