Wang Jianchao, Luo Hongsheng, Zhang Minghai, Zu Xihong, Li Zhiwei, Yi Guobin
Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
Nanoscale Res Lett. 2017 Nov 9;12(1):587. doi: 10.1186/s11671-017-2358-4.
Silver nanowires (AgNWs) were chemically etched to significantly increase the surface roughness and then self-assembled on the liquid/gas interfaces via the interfacial assembly method to obtain aligned chemically etched silver nanowire films. The as-fabricated silver nanowire films were used as novel surface-enhanced Raman scattering (SERS) substrates. The morphologies and plasmon characteristics of the substrates were investigated using multiple measurement methods. The performance of as-fabricated substrates was measured using rhodamine B as a probe. The detection limitation can be as low as 10 M. The greatly improved plasmonic properties are attributed to the efficient light coupling and larger electromagnetic field enhancement. The novel set of SERS substrates of aligned chemically etched AgNWs is believed to be important for efficient, homogeneous, and ultrasensitive SERS sensing applications.
对银纳米线（AgNWs）进行化学蚀刻以显著增加表面粗糙度，然后通过界面组装法在液/气界面上自组装，从而获得排列整齐的化学蚀刻银纳米线薄膜。所制备的银纳米线薄膜用作新型表面增强拉曼散射（SERS）基底。使用多种测量方法研究了基底的形态和等离子体特性。以罗丹明B为探针测量了所制备基底的性能。检测限可低至10⁻⁹ M。等离子体特性的大幅改善归因于有效的光耦合和更大的电磁场增强。这组排列整齐的化学蚀刻AgNWs新型SERS基底被认为对高效、均匀和超灵敏的SERS传感应用具有重要意义。
