期刊
NANOSCALE
卷 7, 期 28, 页码 12068-12075出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr03316k
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资金
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Basic Research Program of China (973 Program) [2012CB825803, 2013CB932702]
- National Natural Science Foundation of China [51422207, 51132006, 21471106]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
- Suzhou Planning Project of Science and Technology [ZXG2012028]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
The C3N4-tyrosinase (TYR) hybrid is a highly accurate, sensitive and simple fluorescent probe for the detection of dopamine (DOPA). Under optimized conditions, the relative fluorescence intensity of C3N4-TYR is proportional to the DOPA concentration in the range from 1 x 10(-3) to 3 x 10(-8) mol L-1 with a correlation coefficient of 0.995. In the present system, the detection limit achieved is as low as 3 x 10(-8) mol L-1. Notably, these quantitative detection results for clinical samples are comparable to those of high performance liquid chromatography. Moreover, the enzyme-encapsulated C3N4 sensing arrays on both glass slide and test paper were evaluated, which revealed sensitive detection and excellent stability. The results reported here provide a new approach for the design of a multifunctional nanosensor for the detection of bio-molecules.
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