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(a) SEM image showing a typical testing configuration. A large number of exposed CFs observed at the fracture surface of antler bone. An individual CF protruding from the fracture surface is attached to the glue at the end of the AFM probe. Translation of the AFM probe away from the fibril causes tensile deformation of the fibril until failure occurs, which is shown in the inset image. (b) Schematic showing set-up of combined SEM–AFM. (Online version in colour.)
