CHEMISTRY OF MATERIALS, v.25, no.8, pp.1190 - 1198
Publisher
AMER CHEMICAL SOC
Abstract
The shape-controlled synthesis of colloidal semiconductor nanocrystals
has attracted a lot of interest because of their shape-dependent physical and chemical
properties. With the growing understanding of the shape evolution, several successful
syntheses of two-dimensional (2D) nanocrystals have been reported. In this review, we
focus on the recent advances in the colloidal synthesis of 2D CdSe nanoribbons with a
wurtzite structure. 2D lamellar assemblies of CdSe clusters are generated in the early
stage of the synthesis, and then they direct the formation of 2D structure. The dense
organic layers on the {112̅0} facets significantly stabilize the 2D nanoribbons. The
nanoribbons exhibit unique optical properties originating from the strong 1D quantum
confinement within their extremely uniform and thin thickness. Interestingly, a large
amount of manganese(II) ions can be incorporated into CdSe nanoribbons via a
nucleation-controlled doping process. A high doping concentration and the strong confinement effect of the nanoribbons result
in enhanced magneto-optical properties that are suitable for spintronic device applications. CdS nanoribbons have a very similar
formation pathway, which suggests the cluster-assembled approaches can potentially be extended to various other materials.