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    Ordering Ag nanowire arrays by a glass capillary: A portable, reusable and durable SERS substrate

    Year: 2012

    Journal: Scientific reports, 2012, 2, 987 (7pp), 20131009

    Authors: Jian-Wei Liu, Jin-Long Wang, Wei-Ran Huang, Le Yu, Xi-Feng Ren, Wu-Cheng Wen, Shu-Hong Yu

    Organizations: Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, CAS Key Laboratory of Mechanical Behavior and Design of Materials, the National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China; Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China

    Assembly of nanowires into ordered macroscopic structures with new functionalities has been a recent focus. In this Letter, we report a new route for ordering hydrophilic Ag nanowires with high aspect ratio by flowing through a glass capillary. The present glass capillary with well-defined silver nanowire films inside can serve as a portable and reusable substrate for surface-enhanced Raman spectroscopy (SERS), which may provide a versatile and promising platform for detecting mixture pollutions. By controlling the flow parameters of nanowire suspensions, initially random Ag nanowires can be aligned to form nanowire arrays with tunable density, forming cambered nanowire films adhered onto the inner wall of the capillary. Compared with the planar ordered Ag nanowire films by the Langmuir-Blodgett (LB) technique, the cambered nanowire films show better SERS performance.