While it is well understood that controlling anisotropic structure formation can be accomplished through establishing kinetic growth conditions, the practical application of accessing nanorods with a specific aspect ratio has not been realized. This work delves into understanding how to grow nanorods with specific lengths and widths. The purpose of this work is to go beyond simply creating a set of growth conditions to obtain rods, dots, rice, and tetrapods and describes how to synthesize a nanomaterial of desirable aspect ratio in a pre-meditated fashion. This work also describes how to control nanocrystal growth on a preexisting seed, enabling greater customizability of anisotropic nanostructures. Furthermore, this is one of the first systems to demonstrate nanorod heterostructure assembly via a living nanocrystal growth procedure. We envision this model system serving as a rubric for development of customizable nanocrystals as well as serve as a platform for understanding heterostructure assembly in colloidal systems.

Kinetically controlled heterostructure assembly of cadmium chalcogenide nanorods

255th National Meeting (2018)

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