This material is based upon work supported in part by the U.S. Department of Energy, Division of Materials Sciences under Award No. DEFG02-91ER45439, through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign, and carried out in part in the Center for Microanalysis of Materials, University of Illinois, which is partially supported by the U.S. Department of Energy under grant DEFG02-91-ER45439. We thank an anonymous reviewer for pointing out several important points on hydrogel behavior.
Tunable Inverse Opal Hydrogel pH Sensors†
Article first published online: 9 APR 2003
© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 15, Issue 7-8, pages 563–566, April, 2003
How to Cite
Lee, Y.-J. and Braun, P.V. (2003), Tunable Inverse Opal Hydrogel pH Sensors. Adv. Mater., 15: 563–566. doi: 10.1002/adma.200304588
- Issue published online: 9 APR 2003
- Article first published online: 9 APR 2003
- Manuscript Accepted: 30 DEC 2002
- Manuscript Received: 5 OCT 2002
- Inverse opals;
- Photonic crystals;
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.