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Average feature height (□,■) and diameter (○,●) determined from topographic AFM images of human, rooster comb and streptococcus zooepidemicus NaHA grafted layers as a function of bulk substrate concentration during processing. Concentrations of NaHA in dilute and semi-dilute regime (i.e., below and above c*, the overlap concentration) are delineated by open and solid symbols, respectively.
