光热治疗
化学
核酸
微流控
检出限
光热效应
再现性
纳米技术
光催化
信号(编程语言)
DNA
生物物理学
组合化学
色谱法
催化作用
生物化学
生物
计算机科学
材料科学
程序设计语言
作者
Shan He,Huiting Lian,Xuegong Cao,Bin Liu,Xiaofeng Wei
标识
DOI:10.1021/acs.analchem.3c03274
摘要
Photosensitizers and photothermal agents have attracted increasing attention for in vitro diagnosis, but the combination remains challenging. Herein, a light-driven photocatalytic–photothermal synergetic system integrated microfluidic distance-based analytical device (PCPT-μDAD) for visual, portable, sensitive, and quantitative detection of targets was developed. Target DNA was recognized and initiated the hybridization chain reaction to form a double-stranded DNA/SYBR Green I (dsDNA/SG-I) complex. By applying the photosensitization of the dsDNA/SG-I complex and the photothermal effect of oxidized 3,3′,5,5′-tetramethylbenzidine, the target concentration can effectively translate into a visual distance signal readout. Importantly, the light-driven PCPT-μDAD greatly improves the controllability of catalytic reactions and signal amplification efficiency. The light-driven PCPT-μDAD shows a low limit of detection (fM level), good stability, and high reproducibility for nucleic acid detection.
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