Journal
IEEE SENSORS JOURNAL
Volume 21, Issue 11, Pages 12798-12807Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2020.3042988
Keywords
Sensors; Chemical sensors; Chemicals; Temperature sensors; Time factors; Temperature measurement; Sensor phenomena and characterization; Hydrogels; swellí ng pressure; chemical sensors
Funding
- German Research Foundation [Deutsche Forschungsgemeinschaft (DFG)] [Ge 779/14-3, Ge 779/24-1, Ge 779/38-1, SPP 1259]
- DFG
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Hydrogels are cross-linked polymer networks capable of absorbing or releasing large amounts of water, with swelling induced by various physical and chemical factors. The sensitivity of hydrogels can be tailored by adjusting their composition or functionalization, and if the interaction with the analyte is reversible, they can be promising candidates for miniaturized, cost-effective, and inline-capable sensors.
Hydrogels are cross-linked polymer networks able to absorb or to release large amounts of water. The water uptake is associated with a considerable volume change but also with changes of optical properties like the refractive index. The swelling can be excited by a large spectrum of different physical (e.g. temperature, electrical voltage, magnetic field) and chemical factors (e.g. pH value, concentrations of chemical or biochemical species). The particular sensitivity can be adjusted by tailoring the composition of the hydrogel or via its functionalization. If the interaction between hydrogel and analyte to be measured is reversible then such hydrogels are becoming a promising candidate for miniaturized, cost-effective and inline-capable sensors.
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