졸-겔 필름을 이용한 반사형 광섬유 pH 센서의 개발Development of Reflection-type Fiber-optic pH Sensor Using Sol-gel Film
- Other Titles
- Development of Reflection-type Fiber-optic pH Sensor Using Sol-gel Film
- Authors
- 유욱재; 서정기; 장경원; 문진수; 한기택; 박장연; 이봉수; 조승현; 허지연; 박병기
- Issue Date
- 2011
- Publisher
- 한국센서학회
- Keywords
- Fiber-Optic Sensor; Optical Fiber; pH Sensor; pH Indicator; Sol-Gel
- Citation
- 센서학회지, v.20, no.4, pp.266 - 271
- Journal Title
- 센서학회지
- Volume
- 20
- Number
- 4
- Start Page
- 266
- End Page
- 271
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/17162
- ISSN
- 1225-5475
- Abstract
- A reflection-type fiber-optic pH sensor, which is composed of a pH sol-gel film, plastic optical fibers, a mirror, a light source and a spectrometer, is developed in this study. As pH indicators, a bromthymol blue, a cresol red and a thymol blue are used, and they are immobilized in the sol-gel films. The emitted light from a light source is guided by a fiber-optic Y-coupler and plastic optical fibers to the pH sol-gel film in a pH sensing probe. The pH change in the sensing probe gives rise to a change in the color of the pH sol-gel film, and the optical characteristic of reflected light through the pH sol-gel film is also changed. Therefore, we have measured the spectra of reflected lights, which are changed according to the color variations of the pH sol-gel films with different pH values, by using of a spectrometer. Also, the relationships between the pH values and the intensities of reflected lights are obtained on the basis of the color variations of the pH sol-gel films.
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Collections - College of Engineering > Department of Energy and Environmental Engineering > 1. Journal Articles
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