Journal Article Selective control of fcc and hcp crystal structures in Au–Ru solid-solution alloy nanoparticles

Zhang, Quan  ,  Kusada, Kohei  ,  Wu, Dongshuang  ,  Yamamoto, Tomokazu  ,  Toriyama, Takaaki  ,  Matsumura, Syo  ,  Kawaguchi, Shogo  ,  Kubota, Yoshiki  ,  Kitagawa, Hiroshi

92018-02-06 , Springer Nature
ナノ合金の画期的な結晶構造制御法の開発に成功 --革新的材料の創製へ--. 京都大学プレスリリース. 2018-02-06.
Binary solid-solution alloys generally adopt one of three principal crystal lattices—body-centred cubic (bcc), hexagonal close-packed (hcp) or face-centred cubic (fcc) structures—in which the structure is dominated by constituent elements and compositions. Therefore, it is a significant challenge to selectively control the crystal structure in alloys with a certain composition. Here, we propose an approach for the selective control of the crystal structure in solid-solution alloys by using a chemical reduction method. By precisely tuning the reduction speed of the metal precursors, we selectively control the crystal structure of alloy nanoparticles, and are able to selectively synthesize fcc and hcp AuRu3 alloy nanoparticles at ambient conditions. This approach enables us to design alloy nanomaterials with the desired crystal structures to create innovative chemical and physical properties.

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