Precise control of structural and compositional hierarchy within low-dimensional materials is needed. Hierarchy can be introduced and tuned through prescribed structural symmetry breaking. First, we discuss the solution-phase synthesis of anisotropic and multi-component nanostructures through photo-stimulation of metal-halide nanoparticles. The complex hierarchical nanostructures are generated at greater than 80% yield, are highly monodisperse, and exhibit crystalline nanophases separated by atomically precise interfaces. We discuss salient mechanistic features of the nanostructure nucleation and growth. Second, we discuss recent results concerning gas-phase synthesis of high aspect ratio 2-dimensional transition metal dichalcogenides (2D-TMD). In-plane growth of the 2D-TMD can be controlled through tailorable interactions with designer substrates. These results point to direct control over the TMD crystal morphology and phase.

Hierarchical nanostructures through prescribed structural symmetry breaking

256th National Meeting (2018)

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