Chemosensors 2013, 1(3), 33-42; doi:10.3390/chemosensors1030033
Article

An Improved Design for Chemomechanical Sensors: A Piezoresistive Pressure Sensor with a Mechanical Boss

Received: 24 August 2013; in revised form: 14 September 2013 / Accepted: 16 October 2013 / Published: 28 October 2013
(This article belongs to the Special Issue Hydrogel-Based Chemosensors)
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.
Abstract: Stimuli-responsive hydrogels can be used to convert miniature pressure sensors into novel chemomechanical sensors via confinement of the hydrogel sample between a porous membrane and a piezoresistive diaphragm. Chemomechanical sensors could prove beneficial in a variety of applications, including continuous monitoring of bioreactors and biomedical systems. In this study, one hydrogel composition with a high sensitivity to changes in pH was tested in two different chemomechanical sensors in order to compare the data obtained from each sensor design. In the first and older chemomechanical sensor design, a prefabricated hydrogel sample is loaded into the sensor chamber using a screw-on cap. In the newer sensor design, a thinner hydrogel is synthesized in situ and is held in place by a silicon boss that is mechanically connected to a piezoresistive diaphragm. The newer design results in a decreased chemomechanical sensor response time (by 60 times), and maintains a high sensitivity to changes in environmental stimuli.
Keywords: hydrogel based sensors; stimuli response; hydrogel thickness; microsensors; continuous analyte monitoring; pH response
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MDPI and ACS Style

Bates, J.; Tathireddy, P.; Buetefisch, S.; Magda, J. An Improved Design for Chemomechanical Sensors: A Piezoresistive Pressure Sensor with a Mechanical Boss. Chemosensors 2013, 1, 33-42.

AMA Style

Bates J, Tathireddy P, Buetefisch S, Magda J. An Improved Design for Chemomechanical Sensors: A Piezoresistive Pressure Sensor with a Mechanical Boss. Chemosensors. 2013; 1(3):33-42.

Chicago/Turabian Style

Bates, Jeffrey; Tathireddy, Prashant; Buetefisch, Sebastian; Magda, Jules. 2013. "An Improved Design for Chemomechanical Sensors: A Piezoresistive Pressure Sensor with a Mechanical Boss." Chemosensors 1, no. 3: 33-42.

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