Fig. 3

Confocal microscope image of colloidal CdSe QDs of 16Â \(\upmu\hbox {m}^2\) area. Each bright spot has a diameter of about 280Â nm, implying diffraction-limited imaging.

Confocal microscope image of colloidal CdSe QDs of 16Â \(\upmu\hbox {m}^2\) area. Each bright spot has a diameter of about 280Â nm, implying diffraction-limited imaging.