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(a) Electron micrograph of titania nanotube coated stent. Inset: nanotubes with an average nanotube diameter of 90 nm (magnification ×250 000). Moffat trichrome-stained images of a stented artery. (b) Titania nanoengineered and (c) Ti stents, showing a 15.6% and 5.6% thinner neointima over the struts for TiO2 NT stents than Ti stent. Reprinted with permission from Nuhn et al., ACS Appl. Mater. Interfaces 9(23), 19677–19686 (2017). Copyright 2017 American Chemical Society.
