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(A) Electron micrograph of colloidal aggregates of tetraiodophenolphthalein (TIPT) at 100 μM (scale bar represents 200 nm). Reprinted with permission from Ref. [22] Copyright 2003 American Chemical Society. (B) Critical aggregation concentration measurement of nicardipine. (C) Measurement of nicardipine concentration in colloidal aggregates (pellet) and monomeric free drug (supernatant). Reprinted with permission from Ref. [7]. Copyright 2008 American Chemical Society.
