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with Carbon quantum dots as keyword

A real-time fluorescent assay for the detection of alkaline phosphatase activity based on carbon quantum dots.

Published in Biosensors & bioelectronics

A convenient and real-time fluorometric assay with the assistance of copper ions based on aggregation and disaggregation of carbon quantum dots (CQDs) was developed to achieve highly sensitive detection of alkaline phosphatase activity. CQDs and pyrophosphate anions (PPi) were used as the fluorescent indicator and substrate for ALP activity assessm...

One-step synthesis of biofunctional carbon quantum dots for bacterial labeling.

Published in Biosensors & bioelectronics

In this study, we used a simple one-step dry heating method to synthesize mannose-modified fluorescent carbon quantum dots (Man-CQDs) from solid ammonium citrate and mannose, and successfully applied for labeling Escherichia coli. The highly soluble Man-CQDs had an average particle diameter of 3.1±1.2 nm and exhibited a quantum yield of 9.8% at exc...

Sensitive detection of biothiols and histidine based on the recovered fluorescence of the carbon quantum dots-Hg(II) sys...

Published in Analytica chimica acta

In this paper, we presented a novel, rapid and highly sensitive sensor for glutathione (GSH), cysteine (Cys) and histidine (His) based on the recovered fluorescence of the carbon quantum dots (CQDs)-Hg(II) system. The CQDs were synthesized by microwave-assisted approach in one pot according to our previous report. The fluorescence of CQDs could be ...

Synthesis of biocompatible and highly photoluminescent nitrogen doped carbon dots from lime: analytical applications and...

Published in Materials science & engineering. C, Materials for biological applications

Herein, a facile hydrothermal treatment of lime juice to prepare biocompatible nitrogen-doped carbon quantum dots (N-CQDs) in the presence of ammonium bicarbonate as a nitrogen source has been presented. The resulting N-CQDs exhibited excitation and pH independent emission behavior; with the quantum yield (QY) up to 40%, which was several times gre...

Fast microplasma synthesis of blue luminescent carbon quantum dots at ambient conditions

One-step green synthesized fluorescent carbon nanodots from bamboo leaves for copper(II) ion detection

Published in Sensors & Actuators: B. Chemical

High quantum yield carbon quantum dots (CQDs) are successfully synthesized via a simple, low cost, and green hydrothermal method using bamboo leaves as carbon source for the first time. Branched polyethylenimine (BPEI)-capped CQDs (BPEI-CQDs) are prepared by coating the CQDs with BPEI via electrostatic adsorption. The BPEI-CQDs are then employed as...

A dual-mode nanosensor based on carbon quantum dots and gold nanoparticles for discriminative detection of glutathione i...

Published in Biosensors and Bioelectronics

●A dual-mode nanosensor for discriminative GSH detection with high sensitivity.●The nanosensor consists of AuNPs and fluorescent CQDs.●Color change of AuNPs and FRET form the basis of the nanosensor.●The label-free nanosensor is simple and flexible.●The nanosensor could function in complicated biological fluids.