Surface modification-induced phase transformation of hexagonal close-packed gold square sheets

Nature Communications
Zhanxi FanHua Zhang

Abstract

Conventionally, the phase transformation of inorganic nanocrystals is realized under extreme conditions (for example, high temperature or high pressure). Here we report the complete phase transformation of Au square sheets (AuSSs) from hexagonal close-packed (hcp) to face-centered cubic (fcc) structures at ambient conditions via surface ligand exchange, resulting in the formation of (100)f-oriented fcc AuSSs. Importantly, the phase transformation can also be realized through the coating of a thin metal film (for example, Ag) on hcp AuSSs. Depending on the surfactants used during the metal coating process, two transformation pathways are observed, leading to the formation of (100)f-oriented fcc Au@Ag core-shell square sheets and (110)h/(101)f-oriented hcp/fcc mixed Au@Ag nanosheets. Furthermore, monochromated electron energy loss spectroscopy reveals the strong surface plasmon resonance absorption of fcc AuSS and Au@Ag square sheet in the infrared region. Our findings may offer a new route for the crystal-phase and shape-controlled synthesis of inorganic nanocrystals.

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Citations

Jan 12, 2016·Journal of the American Chemical Society·Zhanxi FanHua Zhang
Sep 26, 2015·ACS Nano·Hua Zhang
Sep 16, 2015·Journal of the American Chemical Society·Chaoliang Tan, Hua Zhang
Aug 20, 2015·Journal of the American Chemical Society·Zhanxi FanHua Zhang
Jul 13, 2016·ACS Nano·Mengqi ZengLei Fu
Jan 4, 2017·Journal of the American Chemical Society·Jing Lu HuangRong Yu
Mar 18, 2017·Chemical Reviews·Chaoliang TanHua Zhang
Oct 21, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Sifeng MaoKatsumi Uchiyama
Apr 4, 2018·Chemical Society Reviews·Muhammad Aurang Zeb Gul SialXun Wang
Oct 13, 2017·Nature Protocols·Zhanxi FanHua Zhang
Oct 19, 2017·Chemical Society Reviews·Yuhai DouShi Xue Dou
Dec 8, 2017·Chemical Communications : Chem Comm·Kai HuangHui Wu
Jan 23, 2016·Angewandte Chemie·Jong Wook HongSang Woo Han
May 21, 2019·Advanced Materials·Binghao Wang, Antonio Facchetti
Aug 24, 2019·Small·Faisal SaleemHua Zhang
Aug 31, 2019·Advanced Materials·Shu GongWenlong Cheng
Apr 25, 2020·Small·Jianfeng YanWei Xiao
Nov 30, 2018·Chemical Society Reviews·Bowen ZhuWenlong Cheng
Feb 7, 2020·Nanoscale·Farhat NosheenWenping Hu
Apr 17, 2018·Advanced Materials·Hongfei ChengHua Zhang
Apr 3, 2020·Optics Letters·Dezhi ZhuJiawang Xie
Nov 28, 2016·Journal of Materials Chemistry. B, Materials for Biology and Medicine·C Y SongL H Wang
Feb 1, 2019·Journal of Materials Research·Satyanarayana V N T KuchibhatlaDonald R Baer
Oct 11, 2017·Journal of the American Chemical Society·Xiaogang LiYi Xie
Sep 26, 2020·Accounts of Chemical Research·Shiyao LuHua Zhang

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