润湿
拉曼光谱
基质(水族馆)
表面增强拉曼光谱
材料科学
吸附
孔雀绿
污染物
分析物
纳米技术
接触角
分子
色散(光学)
化学工程
分析化学(期刊)
色谱法
化学
拉曼散射
复合材料
工程类
光学
地质学
有机化学
物理
海洋学
作者
Chundong Liu,Maosen Yang,Jing Yu,Fengcai Lei,Yisheng Wei,Qianqian Peng,Chonghui Li,Zhen Li,Chao Zhang,Baoyuan Man
标识
DOI:10.1016/j.snb.2020.127663
摘要
Surface-enhanced Raman spectroscopy (SERS) is widely used in chemical analysis, with very promising application prospects in daily life. However, there are still lots of problems in actual operation, for instance, pollutant detection from sewage, in which the analyte is often dispersed in nonhomogeneous solutions, leading to inaccurate Raman signal collection. Adjusting surface wettability to realize selective self-separation of multiphase liquids in situ on SERS substrate is an effective and challenging approach. In this work, a complex of [email protected] nanowires on Cu mesh modified by different wettability, converting from hydrophilic to hydrophobic by simple infrared illumination, is prepared as a multifunctional SERS substrate. Benefitting from the controllable wettability of the substrate, the multiphase solution can be self-separated and adsorbed at the two opposite terminals of it, and the 10−9 M of malachite green and 10−5 M of thiram used as two kinds of probe molecules can be separately detected at these two terminals. In addition, after fully hydrophobic modification, the substrate can be also used to extract the organic phase in the ‘water/oil’ mixture and perform in situ detection of the probe molecules in the ‘oil’.
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