Confocal microscopy image of (a–c) C3E6D Blue Au NCs, (d–f) C3E6D Red Au NCs’ encapsulated in DOPC GUVs, and (g–i) DOPC GUVs without Au NCs as a control obtained by (a,d,g) bright field, (b,e,h) luminescence, and (c,f,i) merged images. Scale bar, 20 µM.