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Updated: Apr 26, 2026
Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
Published on: August 10, 2017
New synthesis of two-dimensional CdSe/CdS core@shell dot-in-hexagonal platelet nanoheterostructures with interesting
Himani Chauhan1, Yogesh Kumar, Sasanka Deka
1Department of Chemistry, University of Delhi, North campus, Delhi-110007, India. sdeka@chemistry.du.ac.in ssdeka@gmail.com.
Abstract:
A new strategy for the synthesis of fluorescent monodispersed 2-dimensional (2D) CdSe/CdS core/shell hexagonal platelet nanocrystals has been demonstrated. Because of the stronger affinity of the -NH2 group of oleylamine to the (0001Se) facet comprising three dangling bonds in CdSe seeds, oleylamine acts as the sole surfactant responsible for hindering the growth of the CdS shell in the 0001 and 0001[combining macron] facets and for helping the shell growth anisotropically in the 〈100〉 direction. The as-synthesized products were thoroughly characterized using XRD, TEM/HRTEM, HAADF and STEM for determining the crystal structure, growth mechanism and the position of the seed inside a core/shell nanocrystal. Optical absorption, PL, PLE and TRPL studies revealed efficient photoexcitation and the possibility of polarized emission from 2D core/shell nanocrystals.
