Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 14, Pages 12663-12672Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b15746
Keywords
red emission carbon dots; dual mode; colorimetric and fluorescent; Fe3+ detection; cell imaging
Funding
- National Natural Science Foundation of China [21207057]
- Fundamental Research Funds for the Central Universities [lzujbky-2016-43]
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Colorimetric and fluorescent dual mode detection methods have gained much attention in recent years; however, it is still desirable to develop new colorimetric and fluorescent dual mode nanosensors with more simple preparation procedures, low cost, and excellent biocompatibility. Herein, a colorimetric and fluorescent nanosensor based on B, N, S-co-doped carbon dots (BNS-CDs) was synthesized by one-step hydrothermal treatment of 2,5-diaminobenzenesulfonic acid and 4-aminophenylboronic acid hydrochloride. Using this nanosensor, a highly sensitive assay of Fe3+ in the range of 0.3-546 mu M with a detection limit of 90 nM was provided by quenching the red emission fluorescence. It is more attractive that Fe3+ can also be visualized by this nanosensor via evident color changes of the solution (from red to blue) under sunlight without the aid of an ultraviolet (UV) lamp. Furthermore, the designed nanosensor can be applied for efficient detection of intracellular Fe3+ with excellent biocompatibility and cellular imaging capability, and it holds great promise in biomedical applications.
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