Fig. 2. (A) Structure of M13 bacteriophage. (B) Piezoelectricity in the vertically aligned M13 phage structure. Reproduced from ref. 145, with the permission of Royal Society of Chemistry. (C) AFM topography image (top) and PFM amplitude image (bottom) of single collagen fibril. (D) AFM topography image (left) and PFM amplitude image (right) of bone. Reproduced from ref. 153, with the permission of American Chemistry Society.
