Fig. 4

TEM images show the localization of PTX/CUR/Au NRs or PTX/CUR/Au NRs@cRGD inside an A549 cell. a Cellular internalization of PTX/CUR/Au NRs inside the A549 cytoplasm. b Image of the clusters of PTX/CUR/Au NRs@cRGD located on the cell membrane. c Image of the clusters of PTX/CUR/Au NRs@cRGD located at the endosomes. d Cellular internalization of PTX/CUR/Au NRs@cRGD inside the A549 cytoplasm. Scale bar: 200 nm