Advances of Nonclassical Crystallization toward Self-Purification of Precious Metal Nanoparticle Mixtures

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Crystal Growth & Design. American Chemical Society (ACS). 2021, 21(9), pp. 5192-5197. ISSN 1528-7483. eISSN 1528-7505. Available under: doi: 10.1021/acs.cgd.1c00544
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Crystallization is a common procedure used for the purification of compounds. In this work, we use particle-mediated crystallization (i.e., “nonclassical crystallization”) to separate mixtures of core–shell (Au@Ag) nanocrystals of different size and shape into “ordered” phases (i.e., crystalline domains) with nanocrystals of similar morphology and size. The self-assembly process of the drying “coffee ring” effect and of depletion forces and the resulting superstructures are investigated. A “depletion” based technique efficiently separates nanoparticle mixtures with small differences in size (12–22%) within isolated colloidal crystals, while the “coffee ring” technique works better for nanoparticles with a bigger difference in size and shape. Besides the development of a successful approach for the self-purification of nanoparticle mixtures, this study additionally deepens our understanding on particle mediated crystallization under various conditions.

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ISO 690KIRNER, Felizitas, Elena V. STURM, 2021. Advances of Nonclassical Crystallization toward Self-Purification of Precious Metal Nanoparticle Mixtures. In: Crystal Growth & Design. American Chemical Society (ACS). 2021, 21(9), pp. 5192-5197. ISSN 1528-7483. eISSN 1528-7505. Available under: doi: 10.1021/acs.cgd.1c00544
BibTex
@article{Kirner2021Advan-54976,
  year={2021},
  doi={10.1021/acs.cgd.1c00544},
  title={Advances of Nonclassical Crystallization toward Self-Purification of Precious Metal Nanoparticle Mixtures},
  number={9},
  volume={21},
  issn={1528-7483},
  journal={Crystal Growth & Design},
  pages={5192--5197},
  author={Kirner, Felizitas and Sturm, Elena V.}
}
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