<i>N</i>-Carbamoylmaleimide-treated carbon dots: stabilizing the electrochemical intermediate and extending it for the ultrasensitive detection of organophosphate pesticides

Xu, Jinjin; Yu, Chaofan; Feng, Tao; Liu, Mingyue; Li, Fengting; Wang, Ying; Xu, Jing‐Juan

doi:10.1039/c8nr05098h

Cited by 31 publications

(9 citation statements)

References 45 publications

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“…A smart AChE biosensor approach used homemade SPE modified with single-walled carbon nanotubes (SWCNT) derivatized with cobalt phthalocyanine to detect thiocholine at a lower overpotential in comparison to bare SPE and SPE modified with nonfunctionalized SWCNT in only 80 μL of sample [48]. Remarkably, the performance of an AChE-based biosensor was improved due to electrode modification with N-carbamoylmaleimide-functionalized carbon dots (N-MAL-CDs) as a nanostabilizer [49]. The initial electrochemical signals of thiocholine were obtained without signal loss, as a result of the Michael addition reaction functionalizing CDs with N-MAL.…”

Section: Crude Extracts As Enzyme Sources For Biosensing Applicationsmentioning

confidence: 99%

Electrochemical Biosensors Containing Pure Enzymes or Crude Extracts as Enzyme Sources for Pesticides and Phenolic Compounds with Pharmacological Property Detection and Quantification

Colmati¹,

Sgobbi²,

Teixeira³

et al. 2019

Biosensors for Environmental Monitoring

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Biosensors are chemical sensors in which the recognition system is based on a biochemical mechanism. They perform the specific component detection in a sample through an appropriate analytical signal. Enzyme-based biosensors are the most prominent biosensors because of their high specificity and selectivity; besides being an alternative to the common immunosensors, they are more expensive and present a limited binding capacity with the antigen depending on assay conditions. This chapter approaches the use of enzymes modified electrodes in amperometric biosensing application to detect and quantify pesticides and phenolic compounds with pharmacological properties, as they have been a promising analytical tool in environmental monitoring. These biosensors may be prepared from pure enzymes or their crude extracts. Pure enzyme-based biosensors present advantages as higher substrate specificity and selectivity when compared to crude extract enzymatic biosensors; nevertheless, the enzyme high costs are their drawbacks. Enzymatic crude extract biosensors show lower specificity due to the fact that they may contain more than one type of enzyme, but they may be obtained from low-cost fabrication methods. In addition, they can contain enzyme cofactors besides using the enzyme in its natural conformation.

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Section: Crude Extracts As Enzyme Sources For Biosensing Applicationsmentioning

confidence: 99%

Electrochemical Biosensors Containing Pure Enzymes or Crude Extracts as Enzyme Sources for Pesticides and Phenolic Compounds with Pharmacological Property Detection and Quantification

Colmati¹,

Sgobbi²,

Teixeira³

et al. 2019

Biosensors for Environmental Monitoring

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“…For 0D materials, QDs can be taken as an example. QDs can be used as stabilizers (Xu et al, 2018 ). Besides being adopted as stabilizers, Dang et al adopted g-C 3 N 4 QDs modified with redox graphene oxides (rGOs) in photoelectric sensors to measure sulfadimethoxine (SDM).…”

Section: Ld Nanomaterial-based Sensors For Antibiotics Detectionmentioning

confidence: 99%

Low-Dimension Nanomaterial-Based Sensing Matrices for Antibiotics Detection: A Mini Review

Dong

Wang

2020

Front. Chem.

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Antibiotics, a kind of secondary metabolite with antipathogen effects as well as other properties, are produced by microorganisms (including bacterium, fungi, and actinomyces) or higher animals and plants during their lives. Furthermore, as a chemical, an antibiotic can disturb the developmental functions of other living cells. Moreover, it is impossible to avoid its pervasion into all kinds of environmental media via all kinds of methods, and it thus correspondingly becomes a trigger for environmental risks. As described above, antibiotics are presently deemed as a new type of pollution, with their content in media (for example, water, or food) as the focus. Due to their special qualities, nanomaterials, the most promising sensing material, can be adopted to produce sensors with extraordinary detection performance and good stability that can be applied to detection in complicated materials. For low-dimensional (LD) nanomaterials, the quantum size effect, and dielectric confinement effect are particularly strong. Therefore, they are most commonly applied in the detection of antibiotics. This article focuses on the influence of LD nanomaterials on antibiotics detection, summarizes the application of LD nanomaterials in antibiotics detection and the theorem of sensors in all kinds of antibiotics detection, illustrates the approaches to optimizing the sensitivity of sensors, such as mixture and modification, and also discusses the trend of the application of LD nanomaterials in antibiotics detection.

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“…Secondly, the FSG play ac rucial role in customizing the application-targeted PDs.S everals tudies have attempted to design PDsw ith specific FSG for targeting, [28,29] probing, [30,31] catalyzing, [32] and other applications. [33] For example, Xu'sg roup [34] developed l-PDs and d-PDs with chiral FSG from l-o rd-cysteine, respectively,a t6 08C. Only l-PDs could induce ar egulated glycolysis effect in human bladder cancer T24 cells, which was attributed to chiral recognition based on the FSG.…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, the FSG play a crucial role in customizing the application‐targeted PDs. Several studies have attempted to design PDs with specific FSG for targeting, [28, 29] probing, [30, 31] catalyzing, [32] and other applications [33] . For example, Xu's group [34] developed l ‐PDs and d ‐PDs with chiral FSG from l ‐ or d ‐cysteine, respectively, at 60 °C.…”

Section: Introductionmentioning

confidence: 99%

A “Polymer Template” Strategy for Carbonized Polymer Dots with Controllable Properties

Huo

Xia

et al. 2020

Chemistry A European J

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Limited avenues are available for property control of carbonized polymer dots (PDs) owing to the unsatisfactory understanding of PDs" formation. Herein, adenovo "polymer template" strategyi sp resented for PDs with customizable functional surfaceg roups (FSG), size, and underlying fluorescence,w ith ad etailed mechanism. The strategy relies on novel di-active site polymers (DASPs) preparedf rom alkenyl azides via [3+ +2] cycloaddition and guanidino hydrolysis. Benefiting from these specific reactions, the DASPs were convenientf or mass production and stable for storage, and could be transformed to PDsu pon addition of nucleophilic agents throughn ucleophilica ddition and substitution at 70 8C. By regulating the typeso fa lkenyl azides, nucleophilic agents, and reactionc onditions, the as-prepare PDs could be tailoredw ith controlled types of core, FSG, and particle size, as well as fluorescencep roperties of quantum yield from 8.2-55.6 %, and emission maximum from 380-500nm. These specialties maket his "polymer template" strategy a promising start for building PDs-based sensor platforms. Moreover,t he strategy could further our understanding towards PDs' formation, and open up an ew way to customize PDs for specific needs in the fields of analysis, catalysis, images, etc.

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N-Carbamoylmaleimide-treated carbon dots: stabilizing the electrochemical intermediate and extending it for the ultrasensitive detection of organophosphate pesticides

Abstract: N-Carbamoylmaleimide-treated CDs are used for the sensing of by enriching the electrochemical intermediate through Michael addition for the first time.

Cited by 31 publications

References 45 publications

Electrochemical Biosensors Containing Pure Enzymes or Crude Extracts as Enzyme Sources for Pesticides and Phenolic Compounds with Pharmacological Property Detection and Quantification

Electrochemical Biosensors Containing Pure Enzymes or Crude Extracts as Enzyme Sources for Pesticides and Phenolic Compounds with Pharmacological Property Detection and Quantification

Low-Dimension Nanomaterial-Based Sensing Matrices for Antibiotics Detection: A Mini Review

A “Polymer Template” Strategy for Carbonized Polymer Dots with Controllable Properties

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