Semiconductor nanocrystals whose optical properties are largely determined by the quantum confinement effect are currently being extensively studied in both physics and chemistry. Highly luminescent thiol-capped CdTe and HgTe nanocrystals with desirable sizes ranging from less than two to approximately 8 nm have been recently synthesized in aqueous solutions by a wet chemical route. They were used for the preparation of composite multilayer thin films by the layer-by-layer (LBL) deposition technique.
Films containing luminescent nanocrystals were made both on planar substrates and on submicron-sized monodisperse polystyrene spheres. Alternatively, nanocrystals have been incorporated as cores into silica spheres of desirable sizes. Composite nanocrystal/silica and core-shell latex/nanocrystal spheres have been used as building blocks for 3-D colloidal photonic crystals.
Rogach, A.L., Kotov, N.A., Koktysh, D.S., Susha, A.S. and Caruso, F., 2002. II–VI semiconductor nanocrystals in thin films and colloidal crystals. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 202(2), pp.135-144.
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Category: Material & Chemical