Experimental study demonstrates tunable fluorescence wavelength and volume changes in responsive hydrogels, highlighting potential utility for artificial actuators and sensors.
Recently, environmentally responsive hydrogels have gained significant attention owing to their ability to undergo substantial volume changes in response to external stimuli. This unique characteristic has sparked interest in exploring their potential applications in fields such as artificial actuators and sensors. In this study, we developed a fluorescent gel with tunable fluorescence wavelength by adjusting the mixing ratio of DMSO and H2O as solvents. To achieve this objective, we synthesized a gel comprising poly(N-Isopropylacrylamide) with a dimethylaminotolane carboxyl group at the side chain, exhibiting an aggregation-induced emission effect. Through the adjustment of solvent mixing ratio, we observed significant changes in the gel volume along with the modulation of fluorescence wavelength, probably depending on the aggregation state of the polymer chain.
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Amanuma et al. (2024) studied this question.
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