Ionic Strength Responsive Sulfonated Polystyrene Opals

摘要: Stimuli-responsive photonic crystals (PCs) represent an intriguing class of smart materials very promising for sensing applications. Here, selective ionic strength responsive polymeric PCs are reported. They easily fabricated by partial sulfonation polystyrene opals, without using toxic or expensive monomers and etching steps. The color the resulting hydrogel-like ordered structures can be continuously shifted over entire visible range (405–760 nm) changing content ions extremely wide concentration (from about 70 μM to 4 M). optical response is completely independent from pH temperature, initial fully recovered washing sulfonated opals with pure water. These new could find important applications as sensors environmental monitoring well healthcare screening.