荧光
活性氧
量子点
自体荧光
材料科学
生物传感器
光化学
猝灭(荧光)
硅
纳米技术
检出限
荧光寿命成像显微镜
生物物理学
光电子学
化学
光学
生物化学
物理
生物
色谱法
作者
Qianqian Zhao,Ren Zhang,Daixin Ye,Song Zhang,Hui Chen,Jilie Kong
标识
DOI:10.1021/acsami.6b12047
摘要
The monitoring of reactive oxygen species (ROS) in living cells remains challenging because of the complexity, short half-life, and autofluorescence of biological samples. In this work, we designed a ratiometric fluorescent probe for the detection and imaging of ROS, which was constructed from silicon quantum dots (Si QDs) with chlorin e6 (Ce6) through electrostatic attraction and showed well-resolved dual fluorescence emission signals (490 and 660 nm). Sensitive and selective biosensing of hydroxyl radical (•OH) was demonstrated on the basis of fluorescence quenching of the Si QDs and Ce6 as an internal reference to avoid environmental interference, with a detection limit of ∼0.97 μM. The endogenous release of •OH was also monitored and imaged in living cells.
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