Experimental study demonstrates pH-dependent optical diffraction shifts in templated copolymer hydrogels, highlighting their potential for rapid chemical sensing.
The synthesis, swelling kinetics, and optical diffraction of inverse opal hydrogel sensors (see Figure) are demonstrated. Colloidal crystal templating is used to prepare methacrylate/acrylic acid (AA) copolymers that have an interconnected pore structure, allowing facile diffusion and a relatively rapid response. The system shows good mechanical stability and pH‐dependent shifts in optical diffraction regulated by the AA concentration.
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Lee et al. (2003) studied this question.
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