Figure 3From: Optical characterization of colloidal CdSe quantum dots in endothelial progenitor cellsConfocal spectra of intracellular QD1 (hollow stars) and an aggregated QD cluster located outside EPCs (solid stars). The wavelength of the excitation laser source is 458 nm. Excitation power control is 20%. The wavelength scanning step is 12 nm.Back to article page