期刊
ADVANCED OPTICAL MATERIALS
卷 9, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202101382
关键词
aggregation-induced emission; long-lived phosphorescence; phosphorescent imaging; radiative mode switching; second near-infrared (NIR-II) window
资金
- National Natural Science Foundation of China [51803161]
The study introduces a novel strategy for selective signal activation through aggregation-induced emission-mode-switching, enabling the probe to switch from weak fluorescence to strong NIR-II phosphorescence. This new approach utilizes Copper indium selenium (Cu-In-Se) quantum dots, which exhibit over 2.7 x 10^3-fold increase in luminescent lifetime when aggregated, and shows potential for designing smart NIR-II probes for advanced imaging applications.
The fluorescence imaging in the second near-infrared window (NIR-II, 1000-1700 nm) is a very promising and actively studied technique, whereas optical imaging via NIR-II phosphorescence has been seldom studied. Here, an aggregation-induced selective signal activation strategy is reported, which relies on switching of radiative mode of probe from weak fluorescence to strong NIR-II phosphorescence. Copper indium selenium (Cu-In-Se) quantum dots emit extremely weak fluorescence in isolated state, while their aggregation remarkably lights NIR-II phosphorescence up at approximate to 1045 nm with over 2.7 x 10(3)-fold increase in luminescent lifetime. Aggregation-induced emission-mode-switching has been confirmed by encapsulating Cu-In-Se assembles with mesoporous silica nanoparticles (Cu-In-Se@MSN), displaying unique phosphorescence-type emission. NIR-II phosphorescence signals enable Cu-In-Se@MSN to exhibit impressive lifetime imaging and high-order branches of vessels can be accurately determined. Studies on the origin of radiative-mode-switching not only provide a new insight into photophysical process, but also may lay groundwork for designing smart NIR-II probes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据