title: Stimuli-responsive 2D polyelectrolyte photonic crystals for optically encoded pH sensing.
abstract: A versatile photonic crystal sensing motif based on a two-dimensional (2D) inverse opal monolayer of stimuli-responsive polyelectrolyte gel with tunable optical properties is reported. The photonic membrane shows prompt response to pH and can be readily read out from either its optical spectra or interference colours.
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
authors.forename: Cheng
authors.initials: C
authors.lastname: Li
authors.forename: Bettina V
authors.initials: BV
authors.lastname: Lotsch
mesh_terms: D003460:Crystallization; D004573:Electrolytes / Q000737:chemistry; D005782:Gels / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017785:Photons; D011108:Polymers / Q000737:chemistry*
chemical_list: D004573:Electrolytes; D005782:Gels; D011108:Polymers