Example IV: In situ Tapping Mode AFM Study of Surface and Subsurface Regions of Articular Cartilage.   Introduction.

Articular Cartilage: Pressure-Responsive Molecular Nanocomposite

Articular cartilage lines the surfaces of joints and provides the necessary lubricating action under varying loads.   It consists of a hydrogel-like proteoglycan matrix reinforced by a network of collagen fibers.