1Inset, these synthesized CdS QDs simutaneously showed a
red shif emission wavelength from 510 nm to 682 nm, respectively
named as QDs(510), QDs(560), QDs(596), QDs(620), QDs(664) and
QDs(682). Herein, we successfully employed hexametaphosphate
as stabilizers prepare fluorescence-tunable CdS QDs. Lakowicz
et al. previously proposed that the fluorescence emission
maximum of CdS QDs is shifted to longer wavelengths with increasing
particle diameter