Fig. 12

PEG length-dependent circulation of NMs. A schematic illustration of DTTB@PEG NMs preparation. B real-time intrinsic NIR-II visualization of whole-body vascular network on nude mice recorded 60 min p.i. C vessel FWHM width analyses (red lines in panel A) based on the cross-sectional intensity profiles. D pharmacokinetics of NMs following i.v. administration. Reproduced with permission from [218]. Copyright 2020, American Chemical Society