Three-dimensional mono-6-thio-β-cyclodextrin covalently functionalized gold nanoparticle/single-wall carbon nanotube hybrids for highly sensitive and selective electrochemical determination of methyl parathion

Fu, Xucheng; Zhang, Jian; Tao, Yuanyuan; Wu, Ju; Xie, Chenggen; Kong, Lingtao

doi:10.1016/j.electacta.2014.11.144

Cited by 64 publications

(16 citation statements)

References 59 publications

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“…The detection limit is 0.5 nM. The important parameters of sensor, such as detection limit and linear range are compared with previously modified electrodes ( Table 1 ) 1 16 17 18 19 37 38 39 40 41 . The analytical performance of the Ag@GNRs/SPCE is competitive to the previously reported MP sensors.…”

Section: Resultsmentioning

confidence: 99%

Methyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode

Govindasamy

Mani

Chen

et al. 2017

Sci Rep

160

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We have developed a sensitive electrochemical sensor for Organophosphorus pesticide methyl parathion (MP) using silver particles supported graphene nanoribbons (Ag@GNRs). The Ag@GNRs nanocomposite was prepared through facile wet chemical strategy and characterized by TEM, EDX, XRD, Raman, UV-visible, electrochemical and impedance spectroscopies. The Ag@GNRs film modified screen printed carbon electrode (SPCE) delivers excellent electrocatalytic ability to the reduction of MP. The Ag@GNRs/SPCE detects sub-nanomolar concentrations of MP with excellent selectivity. The synergic effects between special electrocatalytic ability of Ag and excellent physicochemical properties of GNRs (large surface area, high conductivity, high area-normalized edge-plane structures and abundant catalytic sites) make the composite highly suitable for MP sensing. Most importantly, the method is successfully demonstrated in vegetables and fruits which revealed its potential real-time applicability in food analysis.

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Section: Resultsmentioning

confidence: 99%

Methyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode

Govindasamy

Mani

Chen

et al. 2017

Sci Rep

160

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“…Since they can form a covalent bonding with gold electrode or gold nanoparticles [8,9] (GNPs), a third category of CDs of interest in electrochemistry is that of thiolated-CDs (SH-β-CDs) [10,11] (both mono or multi-thiolated). Weisser et al [12] investigated four different kinds of mono or multi SH-β-CDs with different chain-length, with respect to their absorption and orientation onto gold electrodes.…”

Section: Chemical Modifications Of Cds For Electrochemical Devicesmentioning

confidence: 99%

“…In order to guarantee more mobility to the CDs once at the surface, and to facilitate the inclusion with target molecules [28], mono-thiolated CDs have been developed too. Fu et al [9] synthetized mono-6-thio-β-CDs using the method of Wang et al [11]. After the electrodeposition of gold nanoparticles (GNPs) onto carbon electrode previously functionalized with single-walled carbon nanotubes (SWCNTs), the electrode has been immersed in SH-β-CDs methanol solution to obtain an Au-SH linkage.…”

Section: Immobilization Strategies On Electrode Surfacesmentioning

confidence: 99%

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

Casulli

Taurino

Carrara

et al. 2019

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Cyclodextrins (CDs) are oligosaccharides composed of six (α), seven (β) or eight (γ) glucose units. Their inner hydrophobic cavity and hydrophilic external surface enable the formation of the “host-guest inclusion complex” with different organic or inorganic molecules showing high molecular selectivity. For these characteristics, CDs have many potential applications in electrochemical sensing. To enable CDs immobilization on the electrode surfaces, different chemical modifications are needed depending of the electrode material, while nanomaterials have been exploited to enhance the sensing signal. The CDs binding onto gold nanoparticles or carbon nanotubes, as an electron-transfer mediator to the electrode surface, is a typical example of it, while also graphene is largely used. The aim of the present review is to give an overview of CDs properties and their applications to electrochemical sensors for medical diagnostics. Different kinds for the functionalization of CDs onto electrode surfaces will be reviewed as well as their performance in presence of nanomaterials. Finally, CDs-based devices for sensing biomedical molecules of biomedical interest will be briefly presented and discussed.

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“…The principal operation for most of biosensors are rely on quantitative measurement of the enzymatic activity before and after exposure to a target analyte [7]. So far, a large number of ChE-based biosensors have been developed which rely on different transducers, such as electrochemical [8], photoelectrochemical [9] and optical transducers [10][11]. The latter has been widely investigated using optical fibers in the last two decades [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A sensitive tapered-fiber optic biosensor for the label-free detection of organophosphate pesticides

Arjmand

Saghafifar

Alijanianzadeh

et al. 2017

Sensors and Actuators B: Chemical

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Three-dimensional mono-6-thio-β-cyclodextrin covalently functionalized gold nanoparticle/single-wall carbon nanotube hybrids for highly sensitive and selective electrochemical determination of methyl parathion

Cited by 64 publications

References 59 publications

Methyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode

Methyl parathion detection in vegetables and fruits using silver@graphene nanoribbons nanocomposite modified screen printed electrode

Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

A sensitive tapered-fiber optic biosensor for the label-free detection of organophosphate pesticides

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