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Development of low cost, low power optical sensing devices based on coupled LEDs for colorimetric analysis

Baldwin, Susan (2005) Development of low cost, low power optical sensing devices based on coupled LEDs for colorimetric analysis. PhD thesis, Dublin City University.

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Abstract

My PhD programme of research with the Adaptive Information Cluster at the National Centre for Sensor Research has focussed on the development of low cost, low powered optical sensing devices. Part of this work was carried out in collaboration with Mitsubishi Electric Research Labs, Boston, USA and was funded by Science Foundation Ireland (SFI). The optical sensing devices were developed as alternative analytical tools for colorimetric based sensing. The main aim of this work was to design and develop these LED based devices, but some applications were also explored, including the use of the devices for the determination of the pH of a solution and the detection of Fe (II). Transmittance and reflectance based devices were developed and both configurations generated sensitive and reliable data. The circuitry used to operate the devices was simple (no A/D converter required) and inherently digital. All of the devices were operated using a 9 V battery. Overall it can be concluded that all of the LED based optical devices are inexpensive, portable and easy to operate.

Item Type:Thesis (PhD)
Date of Award:2005
Refereed:No
Supervisor(s):Diamond, Dermot
Uncontrolled Keywords:Optical Sensors; LED Devices; pH Determination
Subjects:Physical Sciences > Chemical detectors
Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:17421
Deposited On:06 Sep 2012 15:04 by Fran Callaghan. Last Modified 06 Sep 2012 15:04

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