Fiber-optic pH sensor based on sol-gel film immobilized with neutral red

被引：30

作者：

Jeon, Dayeong ^{[1
]}

Yoo, Wook Jae ^{[1
]}

Seo, Jeong Ki ^{[1
]}

Shin, Sang Hun ^{[1
]}

Han, Ki-Tek ^{[1
]}

Kim, Seon Geun ^{[1
]}

Park, Jang-Yeon ^{[1
]}

Lee, Bongsoo ^{[1
]}

机构：

[1] Konkuk Univ, Sch Biomed Engn, Coll Biomed & Hlth Sci, Res Inst Biomed Engn, Chungju 380701, South Korea

来源：

OPTICAL REVIEW | 2013年 / 20卷 / 02期

关键词：

fiber-optic sensor; pH sensor; sol-gel; neutral red; optical fiber; OPTICAL-FIBER; FABRICATION; SILICA;

D O I：

10.1007/s10043-013-0037-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this study, we developed a fiber-optic pH sensor based on a sol-gel film immobilized with neutral red (NR). A solgel film was prepared by mixing tetramethylorthosilicate (TMOS), trimethoxymethylsilane (MTMS), ethanol (EtOH), distilled water (H2O), and NR powder. Accordingly, the thin pH sol-gel film was fabricated through a sol-gel process with a dip-coating method. The thickness and diameter of the fabricated pH sol-gel film are 0.11 and 0.6 mm, respectively. We measured the optical absorbance and the light intensity with the spectra of reflected light, which change with the color variation of the pH sol-gel film in the fiber-optic sensing probe. From the experimental results, we demonstrated that the proposed fiber-optic pH sensor has good reversibility, reproducibility, and a fast response time, in which the optical properties of the NR-based pH sol-gel film change with the pH value.

引用

页码：209 / 213

页数：5

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