The Study of Fabrication of the Liquid Core Waveguide Nutrient Sensor

Abstract:

Article Preview

A novel nutrient sensor using liquid core waveguide technique is reported, implementing Teflon AF 1601S coated microchannels. Straight PDMS microchannels replicated from a master were coated with Teflon AF 1601S and sealed with a Teflon AF 1601S coated Pyrex 7740 wafer. It formed a liquid core waveguide with a low index of refraction channel in which a high index aqueous solution was flowed. Light generated by a fiber-coupled tungsten halogen lamp propagated by total internal reflection to the end of the channel where the light was detected using a CCD array spectrometer. There is a dramatic difference between channels with and without a Teflon coating. The absorbance response of this sensor varies linearly with concentration. This innovative technique provides a potentially low-cost and high efficient approach to fill the inspection technology gap between in-situ and laboratory analyses. It is believed that the novel process is expected to give an impact to the aqueous inspection and to create a highly value-added technology in optical test, measurement industry.

Info:

Periodical:

Key Engineering Materials (Volumes 364-366)

Edited by:

Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO

Pages:

425-430

DOI:

10.4028/www.scientific.net/KEM.364-366.425

Citation:

C. W. Wu et al., "The Study of Fabrication of the Liquid Core Waveguide Nutrient Sensor ", Key Engineering Materials, Vols. 364-366, pp. 425-430, 2008

Online since:

December 2007

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.