Mesocrystals from Platinum Nanocubes

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2021
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Nanomaterials ; 11 (2021), 8. - 2122. - MDPI. - ISSN 2079-4991. - eISSN 2079-4991
Abstract
Platinum nanoparticles are widely known for their numerous electrochemical and catalytic applications. Enhanced or novel properties that may arise when ordering such particles in a highly defined manner, however, are still subject to ongoing research, as superstructure formation on the mesoscale is still a major challenge to be overcome. In this work, we therefore established a reproducible method to fabricate micrometer-sized superstructures from platinum nanocubes. Through small-angle X-ray scattering and electron diffraction methods we demonstrate that the obtained superstructures have a high degree of ordering up to the atomic scale and, therefore, fulfill all criteria of a mesocrystal. By changing the solvent and stabilizer in which the platinum nanocubes were dispersed, we were able to control the resulting crystal habit of the mesocrystals. Aside from mesocrystal fabrication, this method can be further utilized to purify nanoparticle dispersions by recrystallization with respect to narrowing down the particle size distribution and removing contaminations.
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540 Chemistry
Keywords
mesocrystal; self-assembly; platinum; nanoparticle; nanocubes; superlattice; superstructure
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ISO 690JENEWEIN, Christian, Helmut CÖLFEN, 2021. Mesocrystals from Platinum Nanocubes. In: Nanomaterials. MDPI. 11(8), 2122. ISSN 2079-4991. eISSN 2079-4991. Available under: doi: 10.3390/nano11082122
BibTex
@article{Jenewein2021-08-20Mesoc-54878,
  year={2021},
  doi={10.3390/nano11082122},
  title={Mesocrystals from Platinum Nanocubes},
  number={8},
  volume={11},
  issn={2079-4991},
  journal={Nanomaterials},
  author={Jenewein, Christian and Cölfen, Helmut},
  note={Article Number: 2122}
}
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