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Representative TEM images.
Notes: Representative TEM images of (A) AuPEG_1, (B) AuPEG_2, (C) AuPEG_3, and (D) AuPEG_4. Scale bars: 50 nm. (E) HR-TEM image of AuPEG_1 clearly showing a metal core of around 10 nm and suggesting the presence of an organic PEG layer of few nanometers.
Abbreviations: TEM, transmission electron microscopy; PEG, polyethylene glycol; HR-TEM, high-resolution TEM; AuPEG, PEG-coated AuNPs.
