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(a) Schematic presentation of synthetic scheme of PAMAM dendrimer derivatives, from P (1) to PC (2), PCM (3) & PCMS (5) preparation; (b, c) TEM images of PCM &PCMS samples respectively. PCM (scale 2.5 nm) showing particles are not well resolved, yet it can be predicted to be composed of mostly inconsistent spherical aggregates. PCMS (scale 100 nm) image showing well resolved round particles (ranging from ∼8–28 nm).
