Ammonia Gas Detection under Various Humidity Conditions Using Waveguide Surface Plasmon Resonance Spectroscopy

被引：8

作者：

Shinbo, Kazunari ^{[1
]}

Komai, Ryo

Honda, Hiroki

Ohdaira, Yasuo

Baba, Akira

Kato, Keizo

Kaneko, Futao

机构：

[1] Niigata Univ, Grad Sch Sci & Technol, Nishi Ku, 2-8050 Ikarashi, Niigata 9502181, Japan

来源：

ANALYTICAL SCIENCES | 2017年 / 33卷 / 04期

基金：

日本学术振兴会;

关键词：

Surface plasmon; gas sensor; waveguide; ammonia; poly(vinyl alcohol); poly(acrylic acid); SENSOR; FILM; ENHANCEMENT; EXCITATION; PROPERTY; VAPOR; CELL;

D O I：

10.2116/analsci.33.443

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Analysis of NH3 gas under various humidity conditions was conducted using a waveguide surface plasmon resonance (SPR) sensor with dual sensing parts. Two pairs of Ag films/sensing polymer films were prepared separately on a waveguide core of BK-7 slide glass. Poly(acrylic acid) (PAA) and poly(vinyl alcohol) (PVA) were used as sensing materials. A white light was guided through the core by illuminating the substrate edge, and the SPR property was investigated by observing the output light spectrum. The thicknesses of PAA and PVA films were adjusted to induce SPR at different wavelengths. PAA exhibited remarkable response against NH3 gas, but it also exhibited a strong dependence on humidity. In contrast, PVA responded to humidity but hardly responded to NH3 gas below 20 ppm. The dual sensing would allow us to conduct precise NH3 measurements under various humidity conditions.

引用

页码：443 / 447

页数：5