• 文献标题:   Interaction-Transferable Graphene-Isolated Superstable AuCo Nanocrystal-Enabled Direct Cyanide Capture
  • 文献类型:   Article
  • 作  者:   ZHANG LF, ZHANG JS, ZHENG ZF, LIAO YX, XU YT, LI ZW, LI SK, ZHANG L, LIU ZK, YI HB, CHEN Z, TAN WH
  • 作者关键词:  
  • 出版物名称:   ANALYTICAL CHEMISTRY
  • ISSN:   0003-2700 EI 1520-6882
  • 通讯作者地址:   Hunan Univ
  • 被引频次:   3
  • DOI:   10.1021/acs.analchem.9b01811
  • 出版年:   2019

▎ 摘  要

Noble metals with strong plasmons have been widely used as enhancement substrates for molecule identification. However, cyanide, a toxic and important signaling molecule with a corrosive nature to noble metals, makes direct recognition challenging. Herein a novel superstable magnetic graphene-isolated AuCo nanocrystal (MACG) has been designed. Such graphene isolation enables superior stability without corrosion. Moreover, unexpectedly, although graphene isolated direct contact between Au and cyanide, their interaction was transferable and remained, which gifted MACGs direct cyanide capture capability with no specific ligands needed. Density functional theory calculations and natural bond orbital analysis indicated that the graphene isolation only slightly affected the charge transfer and that a relatively strong interaction was maintained between Au and cyanide. MACGs were utilized for efficient cyanide capture and clearance in various hydrologic environments and sensitive in vivo cyanide capture in C. elegans infected with P. aeruginosa, a pathogen with cyanide as the biomarker, indicating promise for various applications.