基于可调控咖啡环效应的表面增强拉曼光谱法检测有机染料

引用本文: 薛长国, 唐毓, 李世琴, 张宏艳, 李本侠. 基于可调控咖啡环效应的表面增强拉曼光谱法检测有机染料[J]. 分析化学, 2021, 49(1): 151-158. doi: 10.19756/j.issn.0253-3820.201535 shu

Citation: XUE Chang-Guo, TANG Yu, LI Shi-Qin, ZHANG Hong-Yan, LI Ben-Xia. Surface Enhanced Raman Spectroscopy for Detection of Organic Dyes Based on Adjustable Coffee Ring Effect[J]. Chinese Journal of Analytical Chemistry, 2021, 49(1): 151-158. doi: 10.19756/j.issn.0253-3820.201535 shu

基于可调控咖啡环效应的表面增强拉曼光谱法检测有机染料

薛长国 ^{1,
,} ,
唐毓 ^1, ,
李世琴 ^1, ,
张宏艳 ^1, ,
李本侠 ^2,

1.
安徽理工大学材料科学与工程学院, 淮南 232001;
2.
浙江理工大学理学院化学系, 杭州 310018

通讯作者: 薛长国,E-mail:chgxue@aust.edu.cn

基金项目:
国家自然科学基金项目（No.11872001）、安徽省自然科学杰出青年科学基金项目（No.1808085J30）和安徽省重点研究与开发计划项目（No.202004h07020026）资助。

摘要: 表面增强拉曼光谱（Surface-enhanced Raman spectroscopy，SERS）是快速、无损检测生物化学物质的良好平台，理论上可检测单个分子水平上的化学物质，但这种潜力受到SERS基底的限制。本研究采用基于可调控咖啡环效应的基底，用于提高SERS在测定痕量分析物时的灵敏度和简便性。通过氧等离子技术改变聚二甲基硅氧烷（Polydimethylsiloxane，PDMS）衬底的表面亲疏水性，进而控制待测染料在衬底上形成的咖啡环形状，考察衬底对拉曼信号的影响；将绿色合成的纳米银颗粒（Silver nanoparticles，AgNPs）与待测染料溶液混合，沉积在PDMS衬底，形成咖啡环，探究拉曼信号的增强效果。结果表明，疏水性的增加，减小了咖啡环的尺寸，提高了咖啡环的紧密度，拉曼信号集中在环上，灵敏度高、重复性好，相对标准偏差（Relative standard deviation，RSD）为5%；咖啡环的形成不仅浓缩了分析物，还减少了AgNPs之间的空间，从而增强了热点效应，SERS检测灵敏度显著提高，检出限达到1×10^-6 mol/L。这种基于咖啡环效应的SERS为废水中染料检测提供了灵敏和环保的方法，具有广阔的应用前景。

关键词:

English

Surface Enhanced Raman Spectroscopy for Detection of Organic Dyes Based on Adjustable Coffee Ring Effect

1.
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2.
Department of Chemistry, School of Science, Zhejiang Sci-Tech University, Hangzhou 310018, China

Corresponding author: XUE Chang-Guo, chgxue@aust.edu.cn

Received Date: 02 September 2020
Revised Date: 29 October 2020
Fund Project:
Supported by the National Natural Science Foundation of China (No.11872001), the Excellent Youth Foundation of Anhui Scientific Committee (No.1808085J30) and the Key Research and Development Program Projects in Anhui Province 2020 (No.202004h07020026).

Abstract: Surface enhanced Raman spectroscopy (SERS) is an excellent platform for the rapid and non-destructive detection of biochemical substances at monomolecular level. However, this detection technique is limited by the substrate. In this work, a substrate based on the adjustable coffee ring effect was used to improve the sensitivity and simplicity of SERS in determination of trace analytes. The coffee ring shape of the dye was regulated by the surface hydrophilicity of polydimethylsiloxane (PDMS) substrate. Meanwhile, coffee rings with different morphologies would influence the Raman signal, which indirectly explained the influence of substrates on Raman signals. Silver nanoparticles (AgNPs) were mixed with the Congo Red solution and deposited on the PDMS substrate to form a coffee ring, which was used to explore the enhancement effect of Raman signal. The results showed that the coffee rings had smaller size and higher compactness with the increase of hydrophobicity. Besides, the Raman signal was mainly concentrated on the ring and exhibited high sensitivity, excellent repeatability and small relative standard deviation (5%). The coffee ring enhanced the hot spot effect by concentrating the gap between the analyzer and AgNPs, which significantly improved the SERS sensitivity and the detection limit reached 1×10^-6 mol/L. This SERS based on the coffee ring effect provided a sensitive and environmentally friendly method for dyes detection in wastewater, and had a broad application prospect.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

基于可调控咖啡环效应的表面增强拉曼光谱法检测有机染料

通讯作者: 薛长国,E-mail:chgxue@aust.edu.cn

English

Surface Enhanced Raman Spectroscopy for Detection of Organic Dyes Based on Adjustable Coffee Ring Effect

Corresponding author: XUE Chang-Guo, chgxue@aust.edu.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于可调控咖啡环效应的表面增强拉曼光谱法检测有机染料

通讯作者: 薛长国,E-mail:chgxue@aust.edu.cn

English

Surface Enhanced Raman Spectroscopy for Detection of Organic Dyes Based on Adjustable Coffee Ring Effect

Corresponding author: XUE Chang-Guo, chgxue@aust.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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