A facile synthesis of branched silver nanowire structures and its applications in surface-enhanced Raman scattering
A facile synthesis of branched silver nanowire structures and its applications in surface-enhanced Raman scattering作者机构：Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Box 603-146 Beijing 100190 China Division of Solid State Physics/The Nanometer Structure Consortium Lund University Box 118 S-22100 Lund Sweden
出 版 物：《Frontiers in Biology》 (生物学前沿（英文版）)
年 卷 期：2012年第7卷第5期
页 面：521-526页
核心收录：
学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学]
主 题：branched silver nanowire surface-enhanced Raman scattering (SERS)
摘 要：We report a facile method of preparing novel branched silver nanowire structures such as Y-shaped, K-shaped and other multi-branched nanowires. These branched nanostructures are synthesized by reducing silver nitrate （AgNO3） in polyethylene glycol （PEG） with polyvinglpyrrolidone （PVP） as capping agent. Statistical data indicate that for the ＂y＂ typed branched nanowire, the branches grow out from the side of the trunk nanowire in a preferential orientation with an angle of 55° between the branch and the trunk. Transmission electron microscopy （TEM） studies indicate that the defects on silver nanowires could support the growth of branched nanowires. Conditions such as the molar ratio of PVP/AgNO3, the reaction temperature, and the degree of polymerization of reducing agent and PVP play important roles in determining the yield of the silver branches. Due to the rough surface, these branched nanostructures can be used as efficient substrates for surface-enhanced Raman scattering applications.
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