Stabilization of 4H hexagonal phase in gold nanoribbons

Zhanxi Fan, Michel Bosman, Xiao Huang, Ding Huang, Yi Yu, Khuong P. Ong, Yuriy A. Akimov, Lin Wu, Bing Li, Jumiati Wu, Ying Huang, Qing Liu, Ching Eng Png, Chee Lip Gan, Peidong Yang () and Hua Zhang ()
Additional contact information
Zhanxi Fan: School of Materials Science and Engineering, Nanyang Technological University
Michel Bosman: Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Xiao Huang: School of Materials Science and Engineering, Nanyang Technological University
Ding Huang: Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research)
Yi Yu: University of California
Khuong P. Ong: Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research)
Yuriy A. Akimov: Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research)
Lin Wu: Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research)
Bing Li: Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link
Jumiati Wu: School of Materials Science and Engineering, Nanyang Technological University
Ying Huang: School of Materials Science and Engineering, Nanyang Technological University
Qing Liu: Nanyang Technological University, Temasek Laboratories at NTU
Ching Eng Png: Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research)
Chee Lip Gan: School of Materials Science and Engineering, Nanyang Technological University
Peidong Yang: University of California
Hua Zhang: School of Materials Science and Engineering, Nanyang Technological University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Gold, silver, platinum and palladium typically crystallize with the face-centred cubic structure. Here we report the high-yield solution synthesis of gold nanoribbons in the 4H hexagonal polytype, a previously unreported metastable phase of gold. These gold nanoribbons undergo a phase transition from the original 4H hexagonal to face-centred cubic structure on ligand exchange under ambient conditions. Using monochromated electron energy-loss spectroscopy, the strong infrared plasmon absorption of single 4H gold nanoribbons is observed. Furthermore, the 4H hexagonal phases of silver, palladium and platinum can be readily stabilized through direct epitaxial growth of these metals on the 4H gold nanoribbon surface. Our findings may open up new strategies for the crystal phase-controlled synthesis of advanced noble metal nanomaterials.

Date: 2015
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DOI: 10.1038/ncomms8684

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