ZnO-CdSe Nanoparticle Clusters as Directional Photoemitters with Tunable Wavelength

摘要

Because of their tailorable optical properties,semiconductor nanocrystals are considered key materials for applications as optical probes,and as components in photochemical cells,light emitting devices,and lasers.While emission and absorption energies of the nanoparticles can be adjusted with the particle sizes,the polarization of the emission can be controlled with the particle shape.For ZnO nanowires,it has recently been shown that the exciton emission occurs preferentially in the direction of the longer axis of the nanocrystal.