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Tunable Inverse Opal Hydrogel pH Sensors
Author(s) -
Lee Y.J.,
Braun P.V.
Publication year - 2003
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200304588
Subject(s) - materials science , acrylic acid , swelling , diffraction , methacrylate , copolymer , colloidal crystal , kinetics , self healing hydrogels , chemical engineering , diffusion , colloid , inverse , polymer chemistry , nanotechnology , polymer , composite material , optics , physics , geometry , mathematics , quantum mechanics , thermodynamics , engineering
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.