Fig. 3

TEM-images of gold nanoparticles conjugated to CPP-AuNPs. CPP-AuNP-agglomerate in solution (a) and cells with CPP-AuNPs taken up via endocytosis (b, c). Endosomes with AuNPs can be found in different stages of maturation (b), EE early endosome, LE late endosome, L lysosome). c shows a more general overview of a cell containing endosomes with CPP-AuNPs. Scale bars: a 100 nm, b 500 nm, inset 100 nm, c 800 nm