Optimized Ge-As-Se-Te chalcogenide glass fiber sensor with polydopamine-coated tapered zone for the highly sensitive detection of p-xylene in waters

被引：14

作者：

Su, Jingxiang ^{[1
,2
]}

Dai, Shixun ^{[1
,2
]}

Gan, Ning ^{[3
]}

机构：

[1] Ningbo Univ, Res Inst Adv Technol, Lab Infrared Mat & Devices, Ningbo 315211, Peoples R China

[2] Key Lab Photoelect Mat & Devices Zhejiang Prov, Ningbo 315211, Peoples R China

[3] Ningbo Univ, Fac Mat Sci & Chem Engn, Ningbo 315211, Peoples R China

来源：

OPTICS EXPRESS | 2020年 / 28卷 / 01期

基金：

中国国家自然科学基金;

关键词：

CHLORINATED HYDROCARBONS; SPECTROSCOPY; FABRICATION; PROTEIN; MUSSEL; PVC;

D O I：

10.1364/OE.381955

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel Ge-As-Se-Te chalcogenide glass (ChG)-tapered fiber (ChG-TF) sensor for detecting environmentally relevant organic pollutants with p-xylene as the model was investigated. The prominent design feature of the sensor is that its tapered zone was coated with a polydopamine membrane by a facile in situ self-polymerization process. As the tapered zone exposed to the aqueous sample, the p-xylene molecules would be enriched into the polydopamine coating. The detection limit for p-xylene aqueous solution obtained by the polydopamine-coated sensor was decreased to 50 mu g/mL, which was approximately 2.5% that of the uncoated one. To the best of our knowledge, this paper is the first report of a polymer membrane coating, which can significantly enhance the sensitivity of the ChG-TF sensor. The straightforward test features and the capacity of the sensor to detect organic pollutants with as low as ppm range revealed that this sensor has great potential for online, in situ environmental qualification. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：184 / 193

页数：10