Mechanistic Transformation of CuI Nanoparticles Into Oxidation-Resistant 2D Copper Nanoplates.

ABSTRACT: Unconventional phase transformations reveal new crystallization mechanisms, yet direct observation of such pathways during nanoscale solution-phase synthesis remains challenging. This study uncovers an atypical growth process in which thermodynamically stable CuI nanoparticles (NPs) transform into high-energy 2D Cu plates. Using a combination of in situ transmission electron microscopy, ex situ structural analysis, and density functional theory calculations shows that the formation of structural defects induced by hexadecylamine and chloride ions facilitates the transformation by promoting surface iodine vacancies. The resulting Cu{111} nanoplates, with ultrathin thicknesses (≈4 nm) and exceptionally high aspect ratios (≈450), display enhanced oxidation resistance and long-term stability u

SUBMITTER: Han HJ 

PROVIDER: S-EPMC12757985 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature