In vivo enhanced drug delivery via GO conjugates. Ex vivo fluorescence images of DOX (the model drug) in the major organs/tissues at 30 min after intravenous injection of NOTA-GO(DOX)-FSHR-mAb and NOTA-GO(DOX) were shown in the upper panels. BLI images of same major organs/tissues were shown in the lower panels to confirm the location(s) of the tumor nodules. T, cbgLuc-MDA-MB-231 tumor nodules-bearing lung; L, liver; K, Kidney; H, heart; S, spleen; M, muscle; B1, blood; B2, bone.