Friction force imaging of microphase-separated copolymers using scanning force microscopy (SFM) is demonstrated to be a viable technique for distinguishing between polymer blocks. The Figure is a friction force image of a cross section of a film of a polystyrene-poly(2 vinylpyridine) (PS-PVP) star copolymer measured with a COOH-modified tip, revealing the morphology of the copolymer.
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Werts et al. (1998) studied this question.
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