The development of advanced information storage materials with spatiotemporal security features is critical to address the growing demand for high-level encryption and anti-counterfeiting protection.Herein,two types o...The development of advanced information storage materials with spatiotemporal security features is critical to address the growing demand for high-level encryption and anti-counterfeiting protection.Herein,two types of 4D-printed fluorescent hydrogels that exhibit time-gated hierarchical morphing and color-varying dual functions,driven solely by temperature,have been successfully developed.Specifically,for the first one,the target blooming state of Hydrogels A is realized under 365 nm UV light through synchronized hierarchical morphing and graded fluorescence color transition(orange→blue).For the second one,under 254 nm UV irradiation,doped Hydrogels B exhibit reversible hierarchical state switching between bloomed and closed configurations,accompanied by dynamic multicolor fluorescence modulation.These promising results originate from spatially gradient crosslinking networks precisely engineered via vat photopolymerization(VP)3D printing,and specially-designed luminescent chromophores,collectively enabling fluorescent hydrogels to achieve an all-in-one stimulus response integrating“shape morphing—multicolor fluorescence—information encryption”under thermal activation.Thus,a unique“codebook”—a time-dependent dual-parameter encryption system can be developed using these 4D-printed fluorescent hydrogels,by dynamically adjusting bending angles and fluorescence ratios,effectively enabling high-security spatiotemporal information protection.The integration of time-gated shape-shifting and multicolor fluorescence enhances encryption complexity through multi-layered protection.4D-printed fluorescent hydrogels enable this bimodal spatiotemporal strategy,preventing unautho-rized access while enabling novel secure storage approaches.展开更多
基金supported by National Natural Science Foundation of China(12304482)Guizhou Provincial Basic Research Program(Natural Science,ZK[2022]Major Project 029 and ZD[2025]025)Fund Project of Guizhou Minzu University(4D Printing Smart Materials Technological Innovative Talents Team,GZMUZK[2023]CXTD01).
文摘The development of advanced information storage materials with spatiotemporal security features is critical to address the growing demand for high-level encryption and anti-counterfeiting protection.Herein,two types of 4D-printed fluorescent hydrogels that exhibit time-gated hierarchical morphing and color-varying dual functions,driven solely by temperature,have been successfully developed.Specifically,for the first one,the target blooming state of Hydrogels A is realized under 365 nm UV light through synchronized hierarchical morphing and graded fluorescence color transition(orange→blue).For the second one,under 254 nm UV irradiation,doped Hydrogels B exhibit reversible hierarchical state switching between bloomed and closed configurations,accompanied by dynamic multicolor fluorescence modulation.These promising results originate from spatially gradient crosslinking networks precisely engineered via vat photopolymerization(VP)3D printing,and specially-designed luminescent chromophores,collectively enabling fluorescent hydrogels to achieve an all-in-one stimulus response integrating“shape morphing—multicolor fluorescence—information encryption”under thermal activation.Thus,a unique“codebook”—a time-dependent dual-parameter encryption system can be developed using these 4D-printed fluorescent hydrogels,by dynamically adjusting bending angles and fluorescence ratios,effectively enabling high-security spatiotemporal information protection.The integration of time-gated shape-shifting and multicolor fluorescence enhances encryption complexity through multi-layered protection.4D-printed fluorescent hydrogels enable this bimodal spatiotemporal strategy,preventing unautho-rized access while enabling novel secure storage approaches.
