The photoreversible color switching system(PCSS)is attracting increasing attention for use in alleviating energy crisis and environmental problems.We report a robust PCSS in which lattice matching enables bottom-up or...The photoreversible color switching system(PCSS)is attracting increasing attention for use in alleviating energy crisis and environmental problems.We report a robust PCSS in which lattice matching enables bottom-up oriented assembly between metal-organic frameworks(MOFs)and inorganic nanocrystals(INCs),two distinct entities that differ drastically in structure and function.Specifically,cubic-phase Prussian blue(PB)of a framework backbone is spontaneously attached to rutile TiO_(2)nanowires in a defined orientation triggered by the lattice matching between the(001)plane of TiO_(2)and the(222)plane of PB.Ultraviolet light irradiation accelerates the photoelectron transport within the oriented TiO_(2)/PB system and enables fast photo switching.The derived TiO_(2)/PB paper can be ranked as one of the best light-printing papers in literature because of its high resolution(∼µm)and capability to be repeatedly written for>100 times without significant loss of contrast.The ultrathin TiO_(2)nanowires are rich in oxygen and Ti vacancies,which allow visible-and sunlight-light printing.Density functional theory calculations suggest that the[Fe(CN)_(6)]^(4−) ligand from the PB attaches preferentially to the(110)surface of TiO_(2)to give the ordered TiO_(2)/PB assembly.The findings demonstrate the strong versatility of particles-mediated assembly in advanced materials design.展开更多
基金supported by the National Key Research and Development Program of China(2020YFA0710303)the National Natural Science Foundation of China(U1905215,51772053,52072076)。
文摘The photoreversible color switching system(PCSS)is attracting increasing attention for use in alleviating energy crisis and environmental problems.We report a robust PCSS in which lattice matching enables bottom-up oriented assembly between metal-organic frameworks(MOFs)and inorganic nanocrystals(INCs),two distinct entities that differ drastically in structure and function.Specifically,cubic-phase Prussian blue(PB)of a framework backbone is spontaneously attached to rutile TiO_(2)nanowires in a defined orientation triggered by the lattice matching between the(001)plane of TiO_(2)and the(222)plane of PB.Ultraviolet light irradiation accelerates the photoelectron transport within the oriented TiO_(2)/PB system and enables fast photo switching.The derived TiO_(2)/PB paper can be ranked as one of the best light-printing papers in literature because of its high resolution(∼µm)and capability to be repeatedly written for>100 times without significant loss of contrast.The ultrathin TiO_(2)nanowires are rich in oxygen and Ti vacancies,which allow visible-and sunlight-light printing.Density functional theory calculations suggest that the[Fe(CN)_(6)]^(4−) ligand from the PB attaches preferentially to the(110)surface of TiO_(2)to give the ordered TiO_(2)/PB assembly.The findings demonstrate the strong versatility of particles-mediated assembly in advanced materials design.
