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Chemosensors 2018, 6(1), 3; https://doi.org/10.3390/chemosensors6010003

Effect of Dangling Bonds on De-Poling Time for Polymeric Electric Field Optical Sensors

1
Applied-Science & Robotics Laboratory for Applied-Mechatronics (ARAtronics Lab.), Mechatronics Engineering Department, German University in Cairo, Cairo 11835, Egypt
2
Micro-Sensor Laboratory, Mechanical Engineering Department, Southern Methodist University, Dallas, TX 75275, USA
3
Faculty of Science (Girls), Chemistry Department, Al-Azhar University, Cairo 11675, Egypt
4
Faculty of Science (Boys), Chemistry Department, Al-Azhar University, Cairo 11675, Egypt
*
Author to whom correspondence should be addressed.
Received: 26 November 2017 / Revised: 10 January 2018 / Accepted: 11 January 2018 / Published: 12 January 2018
(This article belongs to the Special Issue Polymers Based Chemical Sensors)
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Abstract

This paper investigates the possible chemical changes in polydimethylsiloxane (PDMS) caused by two different techniques of fabrication for ultra-sensitive electric field optical sensors. The sensing element is a micro-sphere made from 60:1 PDMS (60 parts base silicon elastomer to one part polymer curing agent by volume). The measurement principle is based on the morphology dependent resonances (MDR) shifts of the micro-sphere. We present the effects of curing and poling of polymer micro-spheres used as optical sensors. The degree of curing leads to changes in the de-poling time which results from dangling bonds in the polymeric chains. Consequently, the longevity of the sensitivity of the sensor can extended by two orders of magnitude. An analysis is carried out along with preliminary experiments to investigate that behavior. View Full-Text
Keywords: morphology dependent resonances; dangling bonds; micro-resonators; electric field sensor; polymeric optical sensors; polarization locking; polymeric cantilevers; electrtrostriction force morphology dependent resonances; dangling bonds; micro-resonators; electric field sensor; polymeric optical sensors; polarization locking; polymeric cantilevers; electrtrostriction force
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ali, A.R.; Tourky, A.S.; Ali, R.A. Effect of Dangling Bonds on De-Poling Time for Polymeric Electric Field Optical Sensors. Chemosensors 2018, 6, 3.

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