Dual AIE nanoparticles embedded bead-like ratiometric fluorescence nanofiber film: preparation and gaseous H2O2 sensing

Due to the important role of H 2 O 2 in human health and environment safety, the development of portable optical sensors for real-time detection of H 2 O 2 in gas phase is highly anticipated. Herein, an electrospun ratio fluorescence film (PVA@Dual-SiO 2 ) with bead structure was constructed by dual Aggregation-induced Emission (AIE) featured silica nanoparticles for convenient detection of gaseous H 2 O 2 . In this system, the blue-emitted AIE silica nanoparticles (T-SiO 2 ) with H 2 O 2 recognition capability was embedded in the spinning fiber as the fluorescent responder. Meanwhile, the red-emitted AIE silica nanoparticles (F-SiO 2 ) was designed as the fluorescent reference unit in film. By exploiting the peroxide-mediated reaction between T-SiO 2 and H 2 O 2 , the dual-emitting PVA@Dual-SiO 2 could sense gaseous H 2 O 2 with high sensitivity and selectivity by ratiometric fluorescence signals. It proved that this film could be used for detecting H 2 O 2 in food samples. This work developed a bead like fiber film sensor with dual AIE emission, which provided a representative case of the fabrication of portable and integrated film sensor with high fluorescence performance.