On the Ostwald ripening of crystalline and amorphous nanoparticles.
basic_science · Level V
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- Record sourced from PubMed, PMID 40019147.
- Also identified by DOI 10.1039/d4sm01544d.
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Abstract
Ostwald ripening of crystalline and amorphous nanoparticle dispersions of a model organic compound are compared. While amorphous nanoparticles show a rapid ripening on the timescale of minutes, the crystalline nanoparticles do not ripen within the timescale of weeks. A metastable zone for crystal growth, presumably involving a free energy barrier, is identified, and we propose that this explains the absence of Ostwald ripening in the nanocrystal dispersion. As Ostwald ripening is a process typically occurring near equilibrium, even a small barrier may prevent ripening.