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Surface properties of crosslinked mPEGA/PCLDA disks. (a) Frictional coefficients between a stainless steel plate and hydrated polymer disks. Inset: Frictional force vs. normal force. (b) Water contact angle and protein adsorption. (c) AFM images. Significant difference (p < 0.05) is between any two groups in (a) and (b).
