Thermodynamic framework elucidating supersaturation throughout nanocrystal growth. (arXiv:2105.00050v1 [cond-mat.mtrl-sci]) Leave a comment

Supersaturation is the fundamental thermodynamic parameter driving crystal
nucleation and growth, yet no method can characterize it during the formation
of colloidal nanocrystals (NCs). Here, we develop a framework to experimentally
characterize time-resolved profiles of supersaturation throughout NC growth. As
demonstrated with Au nanocubes, our methodology can predict the growth profiles
of NCs and reveal supersaturation-associated shape evolutions. By altering
supersaturation dynamics, we modulate these shape evolutions and NC features
with atomic precision. This work paves the way for deeper understanding of the
complex phenomena directing nanoscale crystallization and provides insight for
the rational design of NCs.

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