Synthesis of gold square-like plates from ultrathin gold square sheets : the evolution of structure phase and shape

• Main Authors: Huang, Xiao, Li, Hai, Li, Shaozhou, Wu, Shixin, Boey, Freddy, Ma, Jan, Zhang, Hua
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Chemical engineering::Chemicals and manufacture
• Online Access: https://hdl.handle.net/10356/105849; http://hdl.handle.net/10220/20982
• Institution: Nanyang Technological University

It's hip to be square: Gold square-like plates exhibit alternating hexagonal close-packed (hcp, see picture, yellow) and face-centered cubic (fcc, red) structures in the center and defect-free fcc structures at one pair of the opposite thick edges. They can be synthesized from Au square sheets in a secondary growth process. For the first time, the hcp-to-fcc phase transformation associated with shape variation in Au nanostructures is demonstrated.