Photocatalytic and Antibacterial Activity of Fluorescent CdS Quantum Dots Synthesized Using Aqueous Extract of Cyanobacterium Nostoc carneum

Borah, Debasish; Saikia, Puja; Sarmah, Pampi; Gogoi, Debika; Das, Ankita; Rout, Jayashree; Ghosh, Narendra Nath; Pandey, P. C.; Bhattacharjee, Chira R.

doi:10.1007/s12668-023-01115-z

Cited by 5 publications

(3 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such kind of variation in the absorption spectra is an indication of the formation of the ground-state complex between the excited-state nanoprobe and ground-state analyte, which is a feature of static quenching . We further investigated the kinetics of TM-GO-SF QD interaction with TC by estimating the reaction rate at room temperature using the Langmuir–Hinshel–Wood (L–H) model . For a pseudo-first-order reaction, the rate constant is calculated as follows ln ( C t / C o ) = prefix− k 1 t where k 1 is the rate constant of the pseudo-first-order kinetics, and C o and C t are the concentrations at time zero and t , respectively.…”

Section: Resultsmentioning

confidence: 99%

“… 65 We further investigated the kinetics of TM-GO-SF QD interaction with TC by estimating the reaction rate at room temperature using the Langmuir–Hinshel–Wood (L–H) model. 66 For a pseudo-first-order reaction, the rate constant is calculated as follows where k 1 is the rate constant of the pseudo-first-order kinetics, and C o and C t are the concentrations at time zero and t , respectively. The plot of ln ( C t / C o ) versus t gives the change of reaction rate with respect to time, and its slope represents the rate constant k 1 ( Figure S5 ).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

“Click” Reaction-Mediated Silk Fibroin-Functionalized Thiol-Branched Graphene Oxide Quantum Dots for Smart Sensing of Tetracycline

Goswami

Sarma

2023

ACS Omega

View full text Add to dashboard Cite

The abuse of tetracycline (TC) antibiotics causes the accumulation of their residue in the environment, which has an irreversible impact on food safety and human health. In light of this, it is vital to offer a portable, quick, efficient, and selective sensing platform to detect TC instantly. Herein, we have successfully developed a sensor using silk fibroin-decorated thiol-branched graphene oxide quantum dots through a well-known thiol-ene click reaction. It is applied to ratiometric fluorescence sensing of TC in real samples in the linear range of 0–90 nM, with the detection limit of 49.69, 47.76, 55.25, 47.90, and 45.78 nM for deionized water, chicken sample, fish sample, human blood serum, and honey sample, respectively. With the gradual addition of TC to the liquid media, the sensor develops a synergetic luminous effect in which the fluorescence intensity of the nanoprobe steadily declines at 413 nm, while the intensity of a newly emerging peak increases at 528 nm, maintaining a ratio that is dependent on the analyte concentration. The increase of luminescence properties in the liquid media is clearly visible by naked eyes in the presence of 365 nm UV light. The result helps us in building a filter paper strip-based portable smart sensor using an electric circuit comprising a 365 nm LED (light-emitting diode) powered by a mobile phone battery which is attached just below the rear camera of a smartphone. The camera of the smartphone captures the color changes that occur throughout the sensing process and translates into readable RGB data. The dependency of color intensity with respect to the concentration of TC was evaluated by deducing a calibration curve from where the limit of detection was calculated and found to be 0.125 μM. These kinds of gadgets are important for the possible real-time, on-the-spot, quick detection of analytes in situations where high-end approaches are not easily accessible.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“Click” Reaction-Mediated Silk Fibroin-Functionalized Thiol-Branched Graphene Oxide Quantum Dots for Smart Sensing of Tetracycline

Goswami

Sarma

2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Furthermore, when tested against specific pathogenic bacterial strains, the CdS CQDs showed notable antibacterial activity. 323 Tahir Iqbal et al synthesized carbon nanodot (CND) modified CuS CQDs for enhanced photocatalytic activity in the degradation of Panadol in wastewater. CuS CQD-CND composites were produced in two quantities, 2% and 4%.…”

mentioning

confidence: 99%

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Mondal,

Lamba,

Yukta

et al. 2024

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

Synthesis of water-soluble CdS quantum dots for the fluorescence detection of tetracycline

Narasimhappa,

Singh,

Ramamurthy

2023

Environmental Pollution

View full text Add to dashboard Cite

Photocatalytic and Antibacterial Activity of Fluorescent CdS Quantum Dots Synthesized Using Aqueous Extract of Cyanobacterium Nostoc carneum

Cited by 5 publications

References 95 publications

“Click” Reaction-Mediated Silk Fibroin-Functionalized Thiol-Branched Graphene Oxide Quantum Dots for Smart Sensing of Tetracycline

“Click” Reaction-Mediated Silk Fibroin-Functionalized Thiol-Branched Graphene Oxide Quantum Dots for Smart Sensing of Tetracycline

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Synthesis of water-soluble CdS quantum dots for the fluorescence detection of tetracycline

Contact Info

Product

Resources

About