Multiple responsive photonic prints that can be revealed by a thermal or light stimulus are prepared by locally producing interpenetrating polymer network(IPN)within photonic hydrogels.Thermo-responsive poly-(N-isopro...Multiple responsive photonic prints that can be revealed by a thermal or light stimulus are prepared by locally producing interpenetrating polymer network(IPN)within photonic hydrogels.Thermo-responsive poly-(N-isopropylacrylamide)(PNIPAM)photonic hydrogels with self-assembled monodisperse carbon-encapsulated Fe_(3)O_(4) nanoparticles(Fe_(3)O_(4)@C NPs)are first prepared by a photopolymerization process.Then photopolymerization of acrylamide(AM)is carried out within the photonic hydrogel with the help of a mask to generate an IPN structure locally.Because of the regionally different network structure and the resulting varied responsiveness,responsive photonic prints are obtained.Due to the thermo-responsive capability of the PNIPAM and the photothermal conversion capability of the incorporated Fe_(3)O_(4)@C NPs,the as-prepared photonic prints with a localized IPN structure can shift the structural color in a broad spectrum range under thermal or light stimuli.The current multiple responsive photonic prints with a localized IPN structure can realize full-color pattern display under thermal and light stimulations,providing a new path for anti-counterfeiting,display,and information encoding.展开更多
基金This work was supported by the National Natural Science Foundation of China(No.52022032)the Natural Science Foundation of Hubei Province,China(No.2022CFA048)the Key Research Project of Henan Higher Education Institute,China(No.21A150066)。
文摘Multiple responsive photonic prints that can be revealed by a thermal or light stimulus are prepared by locally producing interpenetrating polymer network(IPN)within photonic hydrogels.Thermo-responsive poly-(N-isopropylacrylamide)(PNIPAM)photonic hydrogels with self-assembled monodisperse carbon-encapsulated Fe_(3)O_(4) nanoparticles(Fe_(3)O_(4)@C NPs)are first prepared by a photopolymerization process.Then photopolymerization of acrylamide(AM)is carried out within the photonic hydrogel with the help of a mask to generate an IPN structure locally.Because of the regionally different network structure and the resulting varied responsiveness,responsive photonic prints are obtained.Due to the thermo-responsive capability of the PNIPAM and the photothermal conversion capability of the incorporated Fe_(3)O_(4)@C NPs,the as-prepared photonic prints with a localized IPN structure can shift the structural color in a broad spectrum range under thermal or light stimuli.The current multiple responsive photonic prints with a localized IPN structure can realize full-color pattern display under thermal and light stimulations,providing a new path for anti-counterfeiting,display,and information encoding.
