Diffusive and martensitic nucleation kinetics in solid-solid transitions of colloidal crystals

Nature Communications
Yi PengYilong Han

Abstract

Solid-solid transitions between crystals follow diffusive nucleation, or various diffusionless transitions, but these kinetics are difficult to predict and observe. Here we observed the rich kinetics of transitions from square lattices to triangular lattices in tunable colloidal thin films with single-particle dynamics by video microscopy. Applying a small pressure gradient in defect-free regions or near dislocations markedly transform the diffusive nucleation with an intermediate-stage liquid into a martensitic generation and oscillation of dislocation pairs followed by a diffusive nucleus growth. This transformation is neither purely diffusive nor purely martensitic as conventionally assumed but a combination thereof, and thus presents new challenges to both theory and the empirical criterion of martensitic transformations. We studied how pressure, density, grain boundary, triple junction and interface coherency affect the nucleus growth, shape and kinetic pathways. These novel microscopic kinetics cast new light on control solid-solid transitions and microstructural evolutions in polycrystals.

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Citations

Mar 1, 2018·Soft Matter·Nikita P KryuchkovValentin N Ryzhov
Feb 9, 2019·Angewandte Chemie·Fan Nan, Zijie Yan
Jul 22, 2020·Chemical Society Reviews·Kerong DengZewei Quan
Sep 23, 2019·The Journal of Chemical Physics·Egor V YakovlevStanislav O Yurchenko
May 24, 2020·Proceedings of the National Academy of Sciences of the United States of America·Young Ki LeeTalid Sinno
Oct 7, 2020·Chemical Society Reviews·Sang Kyu Park, Ying Diao
Feb 3, 2021·Journal of Chemical Theory and Computation·Hossein EslamiFlorian Müller-Plathe
Mar 20, 2021·Physical Review. E·A ScottiW Richtering
Jun 18, 2021·Physical Review. E·Rita I BabichevaSergey V Dmitriev

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Methods Mentioned

BETA
electron microscopy
X-ray

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