Semiconductor nanocrystals are useful for a wide range of applications, but their efficient use depends on an improved understanding of their properties. To characterize nanocrystals of different shapes, we investigated whether crystal shape influences spectral peak features, such as position or width. In this study, previously determined synthesis procedures were followed in order to create CdSe nanocrystals with shapes such as spheres, cubes, rods, and pyramids of various sizes and crystal structures. The shape and size of these nanocrystals were analyzed using TEM. Critical analysis of absorption, emission, and Raman spectra was used to correlate electronic spectral broadening mechanisms and crystal vibrations with nanocrystal shape and dimensionality. This work illustrates the potential use of optical and vibrational spectroscopy for the characterization of CdSe nanocrystals beyond the well-established studies of spherical CdSe nanocrystals.

Influence of CdSe nanocrystal shape on optical and vibrational spectra

2019 Spring National Meeting

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