Thin Solid Films
•Functionalized carbon dots were synthesized.•Carbon dots were dispersed in hybrid xerogel bulk and thin film.•Carbon dots exhibit a strong tunable blue luminescence.•Xerogels were characterized by FT-IR, Raman and fluorescence spectroscopies.•Energy transfer processes were evidenced between C-dots and xerogel matrix.
Research on Chemical Intermediates
Carbon quantum dots (CQDs) with strong photoluminescence (PL) emission and intriguing upconversion emission property have been prepared by facile and effective pyrolysis of the salt calcium disodium ethylenediamine tetraacetate (EDTA–2Na–Ca·4H2O) at 400 °C. The relative fluorescence quantum yield of the CQDs in aqueous solution reached 66.03 %, whi...
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...
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.
Journal of the Iranian Chemical Society
During the recent few years, a number of articles based on detecting the upconversion luminescence in graphene quantum dots (GQDs) or carbon quantum dots (CQDs) using spectrofluorimetry with non-coherent monochromatic light source have been published in trusted journals. Accordingly, some related applications of this phenomenon such as dye degradat...
Journal of Nanoparticle Research
It is also well known that naked SiO2 is not an efficient photocatalyst due to its relatively large band gap, which could only absorb short-wave ultraviolet light. In this report, SiO2/carbon quantum dot (SiO2/CQD, about 4 nm) nanocomposites were successfully prepared by one-step thermal method using tetraethylorthosilicate (TEOS) as the source of ...
AbstractAs functional materials, luminescent films have a wide range of applications in terms of displays, light-emitting devices, safety signs and sensors. Cellulose is the most abundant renewable resource in the world and plays an important role in the field of membrane synthesis. Here, cellulose was dissolved in 7 % NaOH/12 % urea aqueous soluti...
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...
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 ...