材料科学
光化学
光热治疗
光催化
荧光
氧气
激进的
辐照
水溶液
量子点
碳纤维
吸收(声学)
纳米点
带隙
可见光谱
纳米技术
光电子学
光学
化学
有机化学
催化作用
复合材料
物理
核物理学
复合数
作者
Tesen Zhang,Quansheng Cheng,Josh Haipeng Lei,Bingzhe Wang,Yu‐Ling Chang,Yupeng Liu,Guichuan Xing,Chu‐Xia Deng,Zikang Tang,Songnan Qu
标识
DOI:10.1002/adma.202302705
摘要
Abstract Noninvasive fluorescence (FL) imaging and high‐performance photocatalytic therapy (PCT) are opposing optical properties that are difficult to combine in a single material system. Herein, a facile approach to introducing oxygen‐related defects in carbon dots (CDs) via post‐oxidation with 2‐iodoxybenzoic acid is reported, in which some nitrogen atoms are substituted by oxygen atoms. Unpaired electrons in these oxygen‐related defects rearrange the electronic structure of the oxidized CDs (ox‐CDs), resulting in an emerging near‐infrared (NIR) absorption band. These defects not only contribute to enhanced NIR bandgap emission but also act as trappers for photoexcited electrons to promote efficient charge separation on the surface, leading to abundant photo‐generated holes on the ox‐CDs surface under visible‐light irradiation. Under white LED torch irradiation, the photo‐generated holes oxidize hydroxide to hydroxyl radicals in the acidification of the aqueous solution. In contrast, no hydroxyl radicals are detected in the ox‐CDs aqueous solution under 730 nm laser irradiation, indicating noninvasive NIR FL imaging potential. Utilizing the Janus optical properties of the ox‐CDs, the in vivo NIR FL imaging of sentinel lymph nodes around tumors and efficient photothermal enhanced tumor PCT are demonstrated.
科研通智能强力驱动
Strongly Powered by AbleSci AI