Electrochemical nitrite nanosensor developed with amine- and sulphate-functionalised polystyrene latex beads self-assembled on polyaniline

Muchindu, Munkombwe; Waryo, Tesfaye; Arotiba, Omotayo A.; Kazimierska, Ewa; Morrin, Aoife; Killard, Anthony J.; Smyth, Malcolm R.; Jahed, Nazeem; Kgarebe, Boitumelo; Baker, Priscilla; Iwuoha, Emmanuel I.

doi:10.1016/j.electacta.2009.06.047

Cited by 33 publications

(10 citation statements)

References 43 publications

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“…The spread of polymer microparticles has also been applied to modified electrodes, exemplified by polypyrrole colloids [2,3] and polyaniline-polystyrene latex [4]. The latex-modified electrodes have been used for catalysis of nitrite by conducting polymer latex [5], of phenol and catechol by tyrosinase on latex [6], of nitrite by amine-and sulphate-functionalized latex [7], and of heme proteins immobilized on polystyrene latex [8]. Latex particles coated with polyaniline have formed one-particle layer films [9] and self-standing films [10] of electrochemical conversion and corrosion-protected films [11].…”

Section: Introductionmentioning

confidence: 99%

Voltammetric electrodes modified with swollen polyacrylic latex particles

Li¹,

Aoki²,

Chen³

et al. 2011

Journal of Electroanalytical Chemistry

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a b s t r a c tUniformly sized poly(N-isopropylacrylamide-co-acrylic acid) (NIPA/AA) hydrogel particles were synthesized in order to modify an electrode with a carboxyl group-immobilized one-particle layer. They were spheres with a common diameter under given conditions, which ranged from 0.5 lm to 1.0 lm depending on the pH, ionic concentration and temperature. They were swollen at low salt concentrations, low temperatures and high pH of aqueous suspensions. One particle contained 6.0 Â 10 8 carboxyl groups, the concentration of which was ca. 1 M, exhibiting pK a = 5.2. The particles were adsorbed spontaneously on the platinum surface in a one-particle layer with regular arrangement. The particle-adsorbed electrode showed the voltammetric peak for the reduction of hydrogen ions which were dissociated from the carboxylic groups of the adsorbed layer. The amount of the dissociated hydrogen ions per particle was 19% of the loaded amount of carboxyl groups, whereas the non-gelized particles had 3% of the loaded amount. The film worked as a source of supply of hydrogen ions for the electrochemical reduction of 1,4-naphthoquinone. It provided acidic environment of pH 4.5 for the reduction in the neutral solution.

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Section: Introductionmentioning

confidence: 99%

Voltammetric electrodes modified with swollen polyacrylic latex particles

Li¹,

Aoki²,

Chen³

et al. 2011

Journal of Electroanalytical Chemistry

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“…Aniline doped with PV-SO 3 À was polymerized on Pt electrode in 1 M HCl, because acidic medium is required to produce polyaniline emeraldine salt which is the polymers most conducting state [36][37][38][39][40]. The acidic Pt j PANI-PV-SO 3 À was conditioned in PBS to lower the effects of hysteresis [41].…”

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confidence: 99%

Electrochemical Ochratoxin A Immunosensor System Developed on Sulfonated Polyaniline

et al. 2010

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An impedimetric immunosensor for ochratoxin A (OTA) composed of polyaniline-polyvinyl sulfonate and anti-OTA antibody on Pt disk electrode was produced, characterised and calibrated with its responses to standard OTA solutions at pH 7.2. The limit of detection and sensitivity of the OTA immunosensor were calculated to be 10 pg/kg and 563 kW L/ng, respectively. The European Commission limit for OTA in roasted coffee and cereals is 5 mg/kg. Application of the immunosensor to certified reference materials of roasted coffee, wheat and corn gave OTA concentrations of 2.5, 8.6 and 21.1 mg/kg, respectively. The result for corn compared favourably with ELISA results and vendor specifications.

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“…Monchindu et al , electropolymerised aniline doped with polyvinyl sulphonate on screen printed carbon electrodes. The designed electrochemical sensors exhibited good analytical characteristics for nitrate detection [57]. Lin et al , investigated the oxidative electrochemistry of nitrite on a poly(3,4-ethylenedioxythiophene)/iron phthalocyanine/multi-wall carbon nanotubes-modified screen-printed carbon electrode.…”

Section: Screen Printed Sensors For Environmental Monitoringmentioning

confidence: 99%

Disposable Screen Printed Electrochemical Sensors: Tools for Environmental Monitoring

Hayat

Marty

2014

Sensors

361

160

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Screen printing technology is a widely used technique for the fabrication of electrochemical sensors. This methodology is likely to underpin the progressive drive towards miniaturized, sensitive and portable devices, and has already established its route from “lab-to-market” for a plethora of sensors. The application of these sensors for analysis of environmental samples has been the major focus of research in this field. As a consequence, this work will focus on recent important advances in the design and fabrication of disposable screen printed sensors for the electrochemical detection of environmental contaminants. Special emphasis is given on sensor fabrication methodology, operating details and performance characteristics for environmental applications.

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Electrochemical nitrite nanosensor developed with amine- and sulphate-functionalised polystyrene latex beads self-assembled on polyaniline

Cited by 33 publications

References 43 publications

Voltammetric electrodes modified with swollen polyacrylic latex particles

Voltammetric electrodes modified with swollen polyacrylic latex particles

Electrochemical Ochratoxin A Immunosensor System Developed on Sulfonated Polyaniline

Disposable Screen Printed Electrochemical Sensors: Tools for Environmental Monitoring

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