柠檬酸
荧光
水溶液
化学
量子点
硝酸
碳纤维
氧化物
一氧化氮
无机化学
光化学
核化学
纳米技术
材料科学
有机化学
复合材料
物理
复合数
量子力学
作者
Sagarika Bhattacharya,Rhitajit Sarkar,Biswarup Chakraborty,Angel Porgador,Raz Jelinek
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2017-08-16
卷期号:2 (8): 1215-1224
被引量:60
标识
DOI:10.1021/acssensors.7b00356
摘要
Carbon dots (C-dots) prepared through heating of aminoguanidine and citric acid enable bimodal (colorimetric and fluorescence) detection of nitric oxide (NO) in aqueous solutions. The C-dots retained the functional units of aminoguanidine, which upon reaction with NO produced surface residues responsible for the color and fluorescence transformations. Notably, the aminoguanidine/citric acid C-dots were noncytotoxic, making possible real-time and high sensitivity detection of NO in cellular environments. Using multiprong spectroscopic and chromatography analyses we deciphered the molecular mechanism accounting for the NO-induced structural and photophysical transformations of the C-dots, demonstrating for the first time N2 release and azo dye formation upon the C-dots’ surface.
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