Hydrothermal synthesis of nitrogen and boron co-doped carbon quantum dots for application in acetone and dopamine sensors and multicolor cellular imaging

被引：146

作者：

Liu, Yushan ^{[1
]}

Li, Wei ^{[1
]}

Wu, Peng ^{[1
]}

Ma, Chunhui ^{[1
]}

Wu, Xueyun ^{[1
]}

Xu, Mingcong ^{[1
]}

Luo, Sha ^{[1
]}

Xu, Zhou ^{[1
]}

Liu, Shouxin ^{[1
]}

机构：

[1] Northeast Forestry Univ, Coll Mat Sci & Engn, Harbin 150040, Heilongjiang, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2019年 / 281卷

关键词：

Carbon quantum dot; Heteroatom doping; Acetone sensor; Dopamine detection; Multicolor cellular imaging; Hydrothermal carbonization; ONE-POT SYNTHESIS; FLUORESCENCE PROBE; GREEN EMISSION; GLUCOSE; PHOTOLUMINESCENCE; NANOPARTICLES; NANOPROBES; NANODOTS; PLATFORM; CR(VI);

D O I：

10.1016/j.snb.2018.10.075

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nitrogen and boron co-doped carbon quantum dots (NB-CQDs) were prepared via one-pot hydrothermal treatment of citric acid, borax, and p-phenylenediamine. The synthesized NB-CQDs were characterized by transmission electron microscopy, Fourier-transform infrared spectra, X-ray photoelectron spectra, dynamic light scattering, ultraviolet-visible absorption and fluorescence spectra to characterize their surface morphology, crystal structure, functional groups and elemental composition, and optical properties. It was found that N and B species were efficiently doped into the carbon framework of the dots, the N -and B-Containing groups formed on the surface of NB-CQDs during the hydrothermal reaction. The element doping and surface functionalization of NB-CQDs efficiently modulated their physicochemical properties. The NB-CQDs were nearly mono-disperse with an average particle diameter of 3.53 nm, and the excitation/emission wavelengths were 360/490 nm, respectively. The NB-CQDs showed regular photoluminescence (PL) emission under different excitation wavelengths, and possessed pH-dependent and solvent polarity-dependent PL properties. In addition, the NB-CQDs and a NB-CQD/poly(vinyl alcohol) composite film showed good PL responses to acetone solution and vapor. A PL sensor for the determination of acetone solution with a limit of detection (LOD) of 0.54 mu M (R-2 = 0.9956) was then designed. The NB-CQDs were also used for the determination of dopamine. The PL intensity of the NB-CQDs was inversely proportional to the concentration of dopamine in the range of 0.1-70 mu M (R-2 = 0.9958). The LOD of dopamine was 11 nM, and PL quenching occurred via a static quenching mechanism. Additionally, these NB-CQDs can be used for multicolor cellular imaging and showed good uptake by Hepg2 cells.

引用

页码：34 / 43

页数：10

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