A strategy was developed for the synthesis of highly ordered 2D arrays of Ag-PNIPAM hybrid microgel. The highly ordered 2D arrays of PNIPAM microgel were prepared by dispersing PNIPAM microgel on a charge-reversible s...A strategy was developed for the synthesis of highly ordered 2D arrays of Ag-PNIPAM hybrid microgel. The highly ordered 2D arrays of PNIPAM microgel were prepared by dispersing PNIPAM microgel on a charge-reversible substrate. The microgel spheres self-assembled into a 3D colloidal crystal, and the first 111 plane was fixed in situ onto the substrate as a result of spontaneous charge reversal of the substrate, leaving a high-quality 2D array of PNIPAM microgel. Ag nanoparticles were then synthesized in situ inside the microgel spheres by introduction of Ag＋ ions into the microgel spheres and reduction with sodium borohydride. The resulting 2D arrays are highly ordered. The inter-particle distance in the array can be tuned. In addition, the method allows the synthesis of large size arrays and the use of nonplanar substrate.展开更多
Thermoresponsive luminescent organic materials have great potential for intelligent optical devices,but their applicability remains limited due to formidable challenges in achieving tunable response temperature and di...Thermoresponsive luminescent organic materials have great potential for intelligent optical devices,but their applicability remains limited due to formidable challenges in achieving tunable response temperature and different colors.In this study,we developed a thermoresponsive polymer/lanthanide ion(Ln^(3+))complex system,enabling precise regulation of luminescence color and response temperature.The polymer was synthesized via copolymerization of acrylamide(Am)with 6-(3-(2-(methacryloyloxy)ethyl)ureido)picolinate(MAUP).The MAUP unit incorporates ligands capable of coordinating with Ln^(3+)and functions as an“antenna”,absorbing incident light and efficiently transferring energy to Ln^(3+),leading to diverse luminescent emissions.The thermoresponsive property of the poly(Am-co-MAUP)/Ln^(3+)complexes,based on the synergy of ionic coordination and hydrogen bonding,imparts the precise regulation of luminescence with temperature.The response temperature of the poly(Amco-MAUP)/Ln^(3+)complexes can be finely tuned by various factors synergistically,including polymer composition and Ln^(3+)concentrations.Moreover,these thermoresponsive luminescent complexes enable potential applications in multi-level information encryption and visual temperature sensing.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.21374048 and 51625302)Tianjin Committee of Science and Technology(No.16JCZDJC32900)
文摘A strategy was developed for the synthesis of highly ordered 2D arrays of Ag-PNIPAM hybrid microgel. The highly ordered 2D arrays of PNIPAM microgel were prepared by dispersing PNIPAM microgel on a charge-reversible substrate. The microgel spheres self-assembled into a 3D colloidal crystal, and the first 111 plane was fixed in situ onto the substrate as a result of spontaneous charge reversal of the substrate, leaving a high-quality 2D array of PNIPAM microgel. Ag nanoparticles were then synthesized in situ inside the microgel spheres by introduction of Ag＋ ions into the microgel spheres and reduction with sodium borohydride. The resulting 2D arrays are highly ordered. The inter-particle distance in the array can be tuned. In addition, the method allows the synthesis of large size arrays and the use of nonplanar substrate.
基金supported by the Ningbo Youth Leading Talent Project(2024QL020)the National Natural Science Foundation of China(52373118 and 22075154)+1 种基金the“Mechanics+”Interdisciplinary Top Innovative Youth Fund Project of Ningbo University(LJ2024006)the Ningbo Major Science and Technology Project(2024Z205)。
文摘Thermoresponsive luminescent organic materials have great potential for intelligent optical devices,but their applicability remains limited due to formidable challenges in achieving tunable response temperature and different colors.In this study,we developed a thermoresponsive polymer/lanthanide ion(Ln^(3+))complex system,enabling precise regulation of luminescence color and response temperature.The polymer was synthesized via copolymerization of acrylamide(Am)with 6-(3-(2-(methacryloyloxy)ethyl)ureido)picolinate(MAUP).The MAUP unit incorporates ligands capable of coordinating with Ln^(3+)and functions as an“antenna”,absorbing incident light and efficiently transferring energy to Ln^(3+),leading to diverse luminescent emissions.The thermoresponsive property of the poly(Am-co-MAUP)/Ln^(3+)complexes,based on the synergy of ionic coordination and hydrogen bonding,imparts the precise regulation of luminescence with temperature.The response temperature of the poly(Amco-MAUP)/Ln^(3+)complexes can be finely tuned by various factors synergistically,including polymer composition and Ln^(3+)concentrations.Moreover,these thermoresponsive luminescent complexes enable potential applications in multi-level information encryption and visual temperature sensing.
