How a Facet of a Nanocrystal Is Formed : The Concept of the Symmetry Based Kinematic Theory

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ChemPhysChem. Wiley. 2023, 24(2), e202200480. ISSN 1439-4235. eISSN 1439-7641. Available under: doi: 10.1002/cphc.202200480
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Conventional nanocrystal (NC) growth mechanisms have overwhelmingly focused on the final exposed facets to explain shape evolution. However, how the final facets are formed from the initial nuclei or seeds, has not been specifically interrogated. In this concept paper, we would like to concentrate on this specific topic, and introduce the symmetry based kinematic theory (SBKT) to explain the formation and evolution of crystal facets. It is a crystallographic theory based on the classical crystal growth concepts developed to illustrate the shape evolution during the NC growth. The most important principles connecting the basic NC growth processes and morphology evolution are the preferential growth directions and the properties of kinematic waves. On the contrary, the final facets are just indications of how the crystal growth terminates, and their formation and evolution rely on the NC growth processes: surface nucleation and layer advancement. Accordingly, the SBKT could even be applied to situations where non-faceted NCs such as spheres are formed.

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ISO 690NI, Bing, Guillermo GONZALEZ-RUBIO, Helmut CÖLFEN, 2023. How a Facet of a Nanocrystal Is Formed : The Concept of the Symmetry Based Kinematic Theory. In: ChemPhysChem. Wiley. 2023, 24(2), e202200480. ISSN 1439-4235. eISSN 1439-7641. Available under: doi: 10.1002/cphc.202200480
BibTex
@article{Ni2023Facet-58756,
  year={2023},
  doi={10.1002/cphc.202200480},
  title={How a Facet of a Nanocrystal Is Formed : The Concept of the Symmetry Based Kinematic Theory},
  number={2},
  volume={24},
  issn={1439-4235},
  journal={ChemPhysChem},
  author={Ni, Bing and Gonzalez-Rubio, Guillermo and Cölfen, Helmut},
  note={HC thanks the Deutsche Forschungsgemeinschaft (DFG) for financial support within SFB 1214 project B1. G.G.-R. acknowledges the DFG (GO 3526/1-1) for financial support. Article Number: e202200480}
}
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HC thanks the Deutsche Forschungsgemeinschaft (DFG) for financial support within SFB 1214 project B1. G.G.-R. acknowledges the DFG (GO 3526/1-1) for financial support.
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