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- Title
Optically tunable fluorescent carbon nanoparticles and their application in fluorometric sensing of copper ions.
- Authors
Lan, Minhuan; Zhao, Shaojing; Wu, Shuilin; Wei, Xiaofang; Fu, Yanzhao; Wu, Juanjuan; Wang, Pengfei; Zhang, Wenjun
- Abstract
A series of carbon nanoparticles (CNPs) with emission wavelength ranging from 483 to 525 nm were prepared by hydrothermal treatment of poly-3-thiopheneacetic acid (PTA) and NaOH. The emission wavelength and surface oxidation degree of CNPs were shown to be controllable by simply adjusting NaOH concentration. These CNPs presented obvious fluorescence spectral response toward copper ions (Cu2+) through static quenching caused synergistically by electron transfer and inner filter effect. The O- and S-containing groups on the surface of CNPs were demonstrated to be responsible for their outstanding sensing performance. Based on that, a CNPs-based ratiometric fluorescent probe for Cu2+ with a high fluorescence quenching rate constant of 1.4 × 105 L/mol and a short response time (10 s) was developed. Their practical applications in detecting Cu2+ in pond water and living cells were also demonstrated.
- Publication
Nano Research, 2019, Vol 12, Issue 10, p2576
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-019-2489-2