Decahedra and Icosahedra Everywhere: The Anomalous Crystallization of Au and Other Metals at the Nanoscale
Por:
Rogers B., Lehr A., Velázquez-Salazar J.J., Whetten R., Mendoza-Cruz R., Bazan-Diaz L., Bahena-Uribe D., José Yacaman M.
Publicada:
1 ene 2023
Resumen:
Throughout history, objects with fivefold symmetry have been a popular topic of interest for artists, philosophers, and scientists. This may be because fivefold symmetry is very conspicuous in nature. In the case of crystals, fivefold rotational symmetry is mathematically forbidden, and macroscopic crystals exhibiting fivefold symmetry have never been shown to exist. Nevertheless, in the nanoworld, nanoparticles are often found with decahedral and icosahedral shapes that have an overall pseudo-fivefold symmetry. These structures are observed at many length scales, from 1 nm up to 1 µm. In this review, several reasons for the stability of fivefold nanoparticles are discussed. These include the formation of twin boundaries, surface reconstruction faceting, and other factors. © 2023 Wiley-VCH GmbH.
Filiaciones:
Applied Physics and Materials Science Department, Northern Arizona University, Flagstaff, AZ 86011, United States
Center for Materials Interfaces in Research and Applications (¡MIRA!), Northern Arizona University, Flagstaff, AZ 86011, United States
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Mexico City, 04510, Mexico
Laboratorio de Microscopia Electrónica Cinvestav–IPN, México City, 07360, Mexico
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