OPTICAL GAS SENSOR FABRICATION BASED ON PORPHYRIN-ANCHORED ELECTROSTATIC SELF-ASSEMBLY ONTO TAPERED OPTICAL FIBERS

被引：20

作者：

Jarzebinska, Renata ^{[2
]}

Korposh, Sergiy

James, Stephen ^{[2
]}

Batty, William ^{[2
]}

Tatam, Ralph ^{[2
]}

Lee, Seung-Woo ^{[1
]}

机构：

[1] Univ Kitakyushu, Grad Sch Environm Engn, Dept Chem Proc & Environm, Wakamatsu Ku, Kitakyushu, Fukuoka 8080135, Japan

[2] Cranfield Univ, Sch Engn, Bedford, England

来源：

ANALYTICAL LETTERS | 2012年 / 45卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

Ammonia gas; Electrostatic self-assembly process; Porphyrin; Tapered optical fiberfiber gas sensors; LONG-PERIOD GRATINGS; AMMONIA; FILM;

D O I：

10.1080/00032719.2012.673097

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Tapered optical fibers with nano-assembled coatings of thicknesses of order tens of nano-metres were used for the detection of ammonia gas. The film coating was composed of alternate layers of tetrakis-(4-sulfophenyl) porphine (TSPP) and poly(allylamine hydrochloride) (PAH), which were deposited using the electrostatic self-assembly process (ESA). Exposure of a PAH/TSPP nano-assembled non-adiabatic tapered optical fiber with a waist diameter of 10 mu m to ammonia induced significant optical changes in the transmission spectrum of the optical fiber. The fiber optic sensor showed a linear sensitivity to the concentration of ammonia in the range of 10-100 ppm, with response and recovery times less than 100 and 240 sec, respectively. The 3 sigma limit of detection (LOD) was estimated to be ca. 2 ppm.

引用

页码：1297 / 1309

页数：13

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