Alkaline phosphatase (ALP) is one of the most extensively distributed enzymes existed in living species, which could act as crucial prognostic indicators for various diseases. Here, we present novel hybrid photonic alginate hydrogel microparticles for ALP detection. An intermediary chemical, the pyrophosphate ion (PPi), was introduced to trigger the phase transition of the copper alginate hydrogel, while ALP can react with PPi and suppress the process. This response can be converted into dual optical readouts, a fluorescence signal and a structural color signal. Quantitative determination of ALP was established based on this dual-indicator system with high accuracy and reliability.
- Yuetong Wang
- Dagan Zhang
- Yuanjin Zhao