Abstract
Nanomaterials Sequential seeding of nanocrystals can be used to control and develop complex shapes during growth. Smith et al. explored the effects of limiting adatom addition versus diffusion for gold or palladium grown on gold seeds. Fast growth conditions promote branched nanocrystals along the directions. The addition of hydrochloric acid lowered the pH and increased the halide concentration, slowing the rate of metal precursor reduction. Fast growth promoted concave shapes, whereas slower growth favored convex ones. By using the production of one growth cycle as the seed for the next one, 85 distinct hierarchical shapes were grown. ACS Nano 10.1021/acsnano.0c07384 (2020).
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