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A facile solvent mediated self-assembly silver nanoparticle mirror substrate for quantitatively improved surface enhanced Raman scattering
Analyst ( IF 3.6 ) Pub Date : 2017-09-01 00:00:00 , DOI: 10.1039/c7an00784a Yanqi Qu 1, 2, 3, 4 , Chen Tan 1, 2, 3, 4 , Zhiyun Zhang 1, 2, 3, 4 , Lili He 1, 2, 3, 4
Analyst ( IF 3.6 ) Pub Date : 2017-09-01 00:00:00 , DOI: 10.1039/c7an00784a Yanqi Qu 1, 2, 3, 4 , Chen Tan 1, 2, 3, 4 , Zhiyun Zhang 1, 2, 3, 4 , Lili He 1, 2, 3, 4
Affiliation
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Herein, a facile solvent mediated silver nanoparticle (AgNP) mirror was introduced as a reproducible and sensitive surface-enhanced Raman scattering (SERS) substrate. The AgNP mirror was fabricated based on commercially available citrate coated AgNPs via a facile and unique water–solvent interface assembly method without using any electrical equipment. By adding 0.2 mg ml−1 citrate coated AgNPs dropwise into a mediating solvent, self-assembled AgNP mirrors were formed instantly and gradually settled down at the bottom. The mediating solvent is the key for this fabrication, which should contain a mixture of a non-polar (e.g. hexane, cyclohexane, and iso-octane) and a polar (e.g., acetonitrile, acetone, methanol, and ethanol) organic solvents that have a lower density than water. The fabricated AgNP mirror showed a uniform monolayer arrangement which produced highly reproducible and sensitive signals. The coefficient of variance (i.e., percentage relative standard deviation) for AgNP mirrors was 7.3% compared to 33.0% for AgNP aggregates. A lower limit of detection (0.008 ppm) and a higher coefficient of determination (0.9981) for the detection of the fonofos pesticide were also obtained from the AgNP mirror compared to that from the AgNP aggregates. The practical application of this nanoscale AgNP mirror sensing substrate was also confirmed by its accurate quantification of 0.5 ppm fonofos in apple juice and green tea (i.e., 105.06% and 106.16% recovery value, respectively).
中文翻译：
一种方便的溶剂介导的自组装银纳米粒子镜基板，用于定量改善表面增强拉曼散射
本文中，引入了一种简便的溶剂介导的银纳米粒子（AgNP）镜作为可再现且灵敏的表面增强拉曼散射（SERS）衬底。AgNP反射镜是通过市售的柠檬酸盐包覆的AgNPs通过一种简便而独特的水-溶剂界面组装方法制造的，无需使用任何电气设备。通过将0.2 mg ml -1柠檬酸盐涂覆的AgNPs逐滴加入到介导的溶剂中，立即形成了自组装的AgNP镜，并逐渐沉降在底部。中介溶剂是制造的关键，它应包含非极性（例如，己烷，环己烷和异辛烷）和极性（例如，（乙腈，丙酮，甲醇和乙醇）有机溶剂，其密度低于水。制成的AgNP反射镜显示出均匀的单层排列，可产生高度可再现和敏感的信号。AgNP反射镜的方差系数（即相对标准偏差百分比）为7.3％，而AgNP聚集体的方差系数为33.0％。与从AgNP聚集体相比，从AgNP镜中也获得了检出fonofos农药的下限（0.008 ppm）和较高的测定系数（0.9981）。该纳米级AgNP镜面传感底物的实际应用还通过其对苹果汁和绿茶中0.5 ppm的fonofos的准确定量（即，回收率分别为105.06％和106.16％）。
更新日期：2017-09-22
中文翻译：
一种方便的溶剂介导的自组装银纳米粒子镜基板，用于定量改善表面增强拉曼散射
本文中，引入了一种简便的溶剂介导的银纳米粒子（AgNP）镜作为可再现且灵敏的表面增强拉曼散射（SERS）衬底。AgNP反射镜是通过市售的柠檬酸盐包覆的AgNPs通过一种简便而独特的水-溶剂界面组装方法制造的，无需使用任何电气设备。通过将0.2 mg ml -1柠檬酸盐涂覆的AgNPs逐滴加入到介导的溶剂中，立即形成了自组装的AgNP镜，并逐渐沉降在底部。中介溶剂是制造的关键，它应包含非极性（例如，己烷，环己烷和异辛烷）和极性（例如，（乙腈，丙酮，甲醇和乙醇）有机溶剂，其密度低于水。制成的AgNP反射镜显示出均匀的单层排列，可产生高度可再现和敏感的信号。AgNP反射镜的方差系数（即相对标准偏差百分比）为7.3％，而AgNP聚集体的方差系数为33.0％。与从AgNP聚集体相比，从AgNP镜中也获得了检出fonofos农药的下限（0.008 ppm）和较高的测定系数（0.9981）。该纳米级AgNP镜面传感底物的实际应用还通过其对苹果汁和绿茶中0.5 ppm的fonofos的准确定量（即，回收率分别为105.06％和106.16％）。
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