| 초록 |
Here, we report the synthesis of environmentally friendly heterostructured core/shell NCs, i.e,, ZnSe/ZnS, InP/ZnS and InAs/ZnS multipods (MPs). The MPs show polarized absorption and emission across a wide range of wavelength from ultraviolet to near-infrared. A statistical analysis based on transmission electron microscopy and small-angle X-ray scattering reveals that InP/ZnS MPs have shape anisotropy in terms of the difference in diameters of ZnS arms in a particle. This difference results in the asymmetric wavefunction delocalization of electrons, which eventually leads to the fluorescence polarization. In addition, the anisotropic dipole moment of MPs conferred by shape anisotropy interacts with external electric field. We utilize this interaction to achieve a uniaxial alignment of InP/ZnS MPs in a film. |
