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. Author manuscript; available in PMC: 2017 May 15.
Published in final edited form as: Toxicol Appl Pharmacol. 2016 Jan 6;299:58–69. doi: 10.1016/j.taap.2016.01.002

Fig. 7.

Fig. 7

Transmission electron microscopy (TEM) images of nitrogen-doped carbon nanotube cups (NCNCs). A) NCNCs synthesized from chemical vapor deposition; B) NCNCs after separation through probe-tip sonication; C) separated NCNCs loaded with paclitaxel and corked with gold nanoparticles (GNPs) through citrate reduction of chloroauric acid; D) GNP corked NCNCs after incubation with myeloid-derived suppressor cells (MDSC), removal of the GNP cork and degradation of nanotube sidewalls is demonstrated in addition to release of loaded cargo. All scale bars are 100 nm.