Fig. 2

Dynamic interaction between QDs-RBVs and vesicles. a Fluorescence images of QDs-RBVs internalized into Sf9 cells with CellMask-labeled cytomembrane. b Typical time-lapse images of the circled QDs-RBV (red) entering into a Sf9 cell together with CellMask-labeled vesicles (green). Velocity vs time plots (c) and MSD vs time plots (d) of the circled QDs-RBV shown in b. The red curve in d is the fit to \({\text{MSD}} = 4D\tau + (V\tau )^{ 2} + {\text{constant}}\). Both the black and the blue lines in d are the fits to \({\text{MSD}} = 4D\tau^{\alpha } + {\text{constant}}\)