Development of an integrated single-fiber SERS sensor
Development of an integrated single-fiber SERS sensor
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DOI：
10.1016/s0925-4005(00)00291-4
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发表时间：
2000-09-10
影响因子：
8.4
通讯作者：
Vo-Dinh, T
中科院分区：
文献类型：
--
作者：
Stokes, DL;Vo-Dinh, T
一个集成的光纤表面增强拉曼散射（Sers）传感器的基础上的单光纤系统的描述和评价远程和原位测量。传感器的核心由一个独特的单光纤设计，通过引入氧化铝纳米粒子和银涂层到探针尖端的Sers效应。基于单光纤激发/发射（SFEE）的独特设计对于微环境中的原位传感器的制作是实用的。由于单根光纤同时承载激光激发和Sers信号辐射，因此远程尖端的光学参数简单且一致。根据针尖的大小，光纤Sers传感器允许在微尺度环境下进行原位测量。详细介绍了传感器针尖的制作和光学系统的设计。两种检测方案可以使用：一个“浸渍和干燥”模式的检测和原位传感模式被证明为几种化合物，包括甲酚坚牢紫（CFV），灿烂甲酚蓝（BCB），对氨基苯甲酸（PABA）和3-氨基芘（3AP）。为了说明这种新的Sers传感器的有效性，远程原位分析，Sers光谱的水性染料样品（CFV和BCB）。建立了地下水中CFV的定量校准曲线，并确定了地下水中约50 ppb CFV的光学检测限。出版社：Elsevier Science S.A.
An integrated fiberoptic surface-enhanced Raman scattering (SERS) sensor based on a single-fiber system is described and evaluated for remote and in situ measurements. The heart of the sensor consists of a unique single optical fiber designed to induce the SERS effect through the incorporation of alumina nanoparticles and silver coatings onto the probe tip. The unique design based on single-fiber for excitation/emission (SFEE) is practical for the fabrication of in situ sensors in microenvironments. Since the single fiber carries both the laser excitation and SERS signal radiation, optical parameters of the remote tip are simple and consistent. Depending on the tip size, the fiberoptic SERS sensor allows in situ measurements at microscale environments. Details of sensor tip Fabrication and optical system design are described. Two detection schemes can be used: a "dip-and-dry" mode of detection and an in situ sensing mode are demonstrated for several compounds, including cresyl fast violet (CFV), brilliant cresyl blue (BCB), p-aminobenzoic acid (PABA) and 3-aminopyrene (3AP). To illustrate the effectiveness of this new SERS sensor for remote in situ analysis, SERS spectra of aqueous dye samples (CFV and BCB) are presented. A quantitative calibration curve for CFV in groundwater is established and a limit of optical detection of approximately 50 ppb CFV in groundwater is determined. Published by Elsevier Science S.A.