Fig. 2

Photographs of LoVo cells after 2 h of staining with NPs loaded with rhodamine B and coumarin-6 (200 × ; bar: 50 um). a Cell morphology under the light microscopy, b cell morphology under fluorescence microscope(PI fluorescence channel), c cell morphology under fluorescence microscope(FITC fluorescence channel), and d cell morphology under fluorescence microscope(PI/FITC dual fluorescence channel)