Fig. 5From: Nanobio applications of quantum dots in cancer: imaging, sensing, and targetinga Transmission electron micrograph of QD 522Â nm. b Schematic presentation of absorbance and fluorescence emission process and trap band in the band gap. c Absorbance and emission spectra of CdSe. d Absorbance and emission spectra CdSe/ZnS quantum dots (Lu 2005; Hezinger 2010)Back to article page