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Nanomechanical characterization of virgin (top panels) and bleached (bottom panels) Mongolian hair yielding 2 μm × 2 μm mappings with (a) height, (b) DMT modulus, and (c) adhesion contrast. Note that the probed properties can be compared on a relative level (as the virgin and bleached samples were measured with the same cantilever) but cannot be quantified in absolute numbers, as the cantilever was not calibrated against known standards.
