Detection of trace amounts of chromium(VI) using hydrogel coated Fiber Bragg grating
Detection of trace amounts of chromium(VI) using hydrogel coated Fiber Bragg grating
复制标题
DOI：
10.1016/j.snb.2016.12.017
复制
发表时间：
2017-05-01
影响因子：
8.4
通讯作者：
Satyanarayana, M.
中科院分区：
文献类型：
--
作者：
Kishore, P. V. N.;Shankar, M. Sai;Satyanarayana, M.
本文研究了一种基于水凝胶涂层光纤布拉格光栅(FBG)的传感器，该传感器能够检测痕量的致癌金属离子。合成了一种对六价铬离子敏感的四烷基铵盐类刺激响应型水凝胶，并将其包覆在光纤光栅上。当传感器系统暴露在不同浓度的铬(VI)离子溶液中时，由于水凝胶的刺激膨胀特性引起的机械应变，FBG峰发生了移动。峰的移动与铬(VI)金属离子的浓度有关。为此，本文研究了一种化学-机械-光学传感检测铬(VI)的方法。该方法可测定低至10 ppb的痕量铬(VI)离子。传感器系统的分辨率为0.83ppb。该传感器具有良好的灵敏度、选择性和重复性。(C)2016爱思唯尔B.V.保留所有权利。
The present article investigates a hydrogel Coated Fiber Bragg grating (FBG) based sensor capable of detecting trace amounts of carcinogenic chromium(VI) metal ion. A stimulus responsive hydrogel encompassed with tetraalkylammonium salts which is specifically sensitive to Cr(VI) ion, is synthesized and coated on FBG. When the proposed sensor system is exposed to various concentrations of Cr(VI) ion solutions, FBG peak is shifted due to the mechanical strain induced by the stimulus swelling property of the hydrogel. The peak shift is correlated with the concentration of the Cr(VI) metal ion. Thus a Chemo-mechanical-optical sensing approach for the detection of Cr(VI) is studied. Trace amounts of chromium(VI) ion as low as 10 ppb can be estimated by the method. The resolution of the sensor system is found to be 0.83 ppb. The sensor has shown good sensitivity, selectivity, and repeatability. (C) 2016 Elsevier B.V. All rights reserved.