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Open AccessReview

Review on Hydrogel-based pH Sensors and Microsensors

Technische Universität Dresden, Institute of Electromechanical and Electronic Design, 01062 Dresden, Germany
Technische Universität Dresden, Physical Chemistry of Polymers, 01062 Dresden, Germany
Technische Universität Dresden, Macromolecular Chemistry and Textile Chemistry, 01062 Dresden, Germany
Author to whom correspondence should be addressed.
Sensors 2008, 8(1), 561-581;
Received: 2 December 2007 / Accepted: 24 January 2008 / Published: 25 January 2008
(This article belongs to the Special Issue State-of-the-Art Polymer Based pH Sensors)
Stimuli-responsive hydrogels are materials with great potential for development of active functionalities in fluidics and micro-fluidics. Based on the current state of research on pH sensors, hydrogel sensors are described qualitatively and quantitatively for the first time. The review introduces the physical background of the special properties of stimuli-responsive hydrogels. Following, transducers are described which are able to convert the non-electrical changes of the physical properties of stimuli-responsive hydrogels into an electrical signal. Finally, the specific sensor properties, design rules and general conditions for sensor applications are discussed. View Full-Text
Keywords: pH sensor; microsensor; stimuli-responsive hydrogel; phase transition. pH sensor; microsensor; stimuli-responsive hydrogel; phase transition.
MDPI and ACS Style

Richter, A.; Paschew, G.; Klatt, S.; Lienig, J.; Arndt, K.-F.; Adler, H.-J.P. Review on Hydrogel-based pH Sensors and Microsensors. Sensors 2008, 8, 561-581.

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