| Abstract Scope |
Colloidal photoluminescent(PL) semiconductor nanocrystals have attracted significant attention over the past decade for both fundamental science and potential applications. For example, with tunable bandgap across the visible range (~400 nm to ~700 nm) of the electromagnetic spectrum, CdSe quantum dots(QDs) are of particular interest for the fundamental study of photophysics and have great potential in various applications including bio-imaging and bio-labeling. QDs are spherical semicondutor nanocrystals whose excitons are confined in three spatial dimensions, and can thus absorb and emit light size-dependently. Their optical properties, absorption and emission, are size-dependent. Therefore, one colloidal ensemble of regular QDs(RQDs) is fascinating, but with intrinsic difficulties to study: the variation in size leads to inhomogeneous spectral broadening, in addition to homogeneous spectral broadening. This presentation will address our recent advances in the synthesis of colloidal PL semiconductor QDs which are single-sized without inhomogeneous spectral broadening. The single-sized QDs are also termed as magic-sized QDs(MSQDs), including CdS, CdSe, CdTe, CdTeSe, and CdP. |