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Scanning electron microscopy images of multiwalled (A) oxidized, (B) heparin, and (C) polyglycolic acid carbon nanotubes. The blue circles in (D) denote the formation of polymeric micelles on multiwalled carbon nanotubes (MWCNTs).
Abbreviations: NTUST, National Taiwan University of Science and Technology; SEI, second electron imaging; WD, working distance.
