The use of tungsten disulfide dots as highly selective, fluorescent probes for analysis of nitrofurazone

Guo, Xin; Wang, Yong; Wu, Fang; Ni, Yongnian; Kokot, Serge

doi:10.1016/j.talanta.2015.07.055

Cited by 54 publications

(34 citation statements)

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“…Though the potassium intercalation was found to be effective, the product demanded a complicated and laborious purification process to remove the potassium ions. Following this, fairly new findings on the WS 2 QD synthesis were also reported which necessitates the ultra‐sonication of WS 2 nanosheets followed by a reflux, hydrothermal reaction between sodium tungstate and l ‐glutathione, sonication assisted hydrothermal reaction in the presence of hexadecyl trimethylamonium bromide (CTAB) etc . However, the liquid exfoliation methods with high boiling point solvents require higher temperatures to remove the solvents, which can result in the aggregation of WS 2 QDs.…”

Section: Introductionmentioning

confidence: 99%

“…Following this, fairly new findings on the WS 2 QD synthesis werea lso reported which necessitates the ultra-sonication of WS 2 nanosheetsf ollowed by ar eflux,h ydrothermalr eactionb etween sodiumt ungstate and l-glutathione, sonication assisted hydrothermal reactioni nt he presence of hexadecyl trimethylamonium bromide (CTAB) etc. [10][11][12] However, the liquid exfoliation methodsw ith high boilingp oint solvents require higher temperatures to remove the solvents, which can resulti nt he aggregation of WS 2 QDs. Therefore, such harsh chemical treatmentsc an have catastrophic consequences on the planar mor-phologies.…”

Section: Introductionmentioning

confidence: 99%

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A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots

Valappil

Anil

Shaijumon

et al. 2017

Chemistry A European J

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Transition-metal dichalcogenide quantum dots (TMDQDs) with few layers are in the forefront of recent research on tailored 2D layered materials owing to their unique band structure. Such quantum dots (QDs) draw wide interest as potential candidates for components in optoelectronic devices. Although a few attempts towards single step synthesis of MoS QDs have been demonstrated, limited methods are available for WS QDs. Herein, we demonstrate a one-step electrochemical synthesis of luminescent WS QDs from their bulk material. This is achieved by a synergistic effect of perchlorate intercalation in non-aqueous electrolyte and the applied electric field. The average size of the WS QDs is 3 ±1 nm (N=102) with few layers. The QDs show a higher photoluminescence (PL) quantum efficiency (5 %) and exhibit an excitation wavelength-dependent photoluminescence. This unprecedented electrochemical avenue offers a strategy to synthesize size tunable WS nanostructures, which have been systematically investigated by various characterization techniques such as transmission electron microscopy (TEM), photoluminescence and UV/Vis spectroscopies, and X-ray diffraction (XRD). Time-dependent TEM investigations revealed that time plays a vital role in this electrochemical transformation. This electrochemical transformation provides a facile method to obtain WS QDs from their bulk counterpart, which is expected to have a greater impact on the design and development of nanostructures derived from 2D materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots

Valappil

Anil

Shaijumon

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…By measuring the fluorescence ratio of MoS 2 QDs and P EP-PEI , the limit of detection (LOD) of EP and AA was achieved as low as 0.05 and 0.2 μm, respectively. WS 2 QDs, another kind of TMDs QDs, were also employed as the donor in FRET sensors [56]. The WS 2 dots synthesized by hydrothermal method showed a high quantum yield of 0.066 at the excitation of 324 nm.…”

Section: D-qds As the Donor In Fret Sensorsmentioning

confidence: 99%

Two-dimensional nanomaterials for Förster resonance energy transfer–based sensing applications

Zhou

Chen

et al. 2020

Nanophotonics

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Abstract Förster resonance energy transfer (FRET)–based sensing has been steadily gaining popularity in the areas of biochemical analysis, environmental monitoring, and disease diagnosis in the past 20 years. Two-dimensional (2D) nanomaterials are extensively used as donors and acceptors in the FRET sensing because of their attractive optical and chemical properties. In this review, we first present the FRET theory and calculations to give readers a better understanding of the FRET phenomenon. Then, we discuss the recent research advances in using 2D nanomaterials as donors and acceptor in FRET sensing. Finally, we summarize the existing challenges and future directions of 2D nanomaterials in the FRET sensing applications.

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“…Semicarbazide (SEM) is a hydrazine derivative and widely exists in food as a toxic contaminant with carcinogenicity, teratogenicity, mutagenicity, and other side effect. Some previous reports suggested that the rapidly screening SEM could provide crucial clues for the evaluation for illegal abuse of veterinary drug of nitrofurazone . Moreover, the evidence in literatures showed that SEM could not only be detected in food packed in glass jars and bottles with plastic gaskets using azodicarbonamide as foaming agent, but also presented in food using ADC as gluten fortifier .…”

Section: Introductionmentioning

confidence: 99%

Rapid determination of trace semicarbazide in flour products by high‐performance liquid chromatography based on a nucleophilic substitution reaction

Wei

Zhang

2017

J of Separation Science

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Semicarbazide, a toxic food contaminant, widely exists in food products and it originates from the thermal degradation of a food additive of azodicarbonamide or a metabolite of nitrofurazone abused in meat specimens. Many previous methods for semicarbazide determination usually required expensive instruments, difficult-to-prepare monoclonal antibodies, and a long operation time. In this study, a high-performance liquid chromatography method was developed for the rapid determination of trace semicarbazide coupling with a nucleophilic substitution reaction firstly using 4-nitrobenzoyl chloride as derivatization reagent. The derivatization reaction was mild at room temperature for 1 min in neutral solution. Then, semicarbazide derivative was separated and quantified by high-performance liquid chromatography with ultraviolet detection under optimal separation conditions at λ = 261 nm. The proposed method offered the detection limit of 1.8 μg/L and was successfully applied for the rapid determination of trace semicarbazide in flour products. Semicarbazide in positive real samples could be actually found and quantified in the range of 0.47-7.53 mg/kg. The recoveries were 76.6-119% with relative standard deviations of 0.5-9.1% (n = 3). This developed method was rapid, reliable, and convenient for the determination of trace semicarbazide in food.

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The use of tungsten disulfide dots as highly selective, fluorescent probes for analysis of nitrofurazone

Cited by 54 publications

References 50 publications

A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots

A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots

Two-dimensional nanomaterials for Förster resonance energy transfer–based sensing applications

Rapid determination of trace semicarbazide in flour products by high‐performance liquid chromatography based on a nucleophilic substitution reaction

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The use of tungsten disulfide dots as highly selective, fluorescent probes for analysis of nitrofurazone

Cited by 54 publications

References 50 publications

A Single‐Step Electrochemical Synthesis of Luminescent WS2 Quantum Dots

A Single‐Step Electrochemical Synthesis of Luminescent WS2 Quantum Dots

Two-dimensional nanomaterials for Förster resonance energy transfer–based sensing applications

Rapid determination of trace semicarbazide in flour products by high‐performance liquid chromatography based on a nucleophilic substitution reaction

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A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots

A Single‐Step Electrochemical Synthesis of Luminescent WS₂ Quantum Dots