| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Madhu, Rajesh
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2016Enhanced electrocatalytic activity of gold nanoparticles on hydroxyapatite nanorods for sensitive hydrazine sensorscitations
- 2015Facile synthesis of MnO<sub>2</sub>/carbon nanotubes decorated with a nanocomposite of Pt nanoparticles as a new platform for the electrochemical detection of catechin in red wine and green tea samplescitations
- 2015Preparation of a reduced graphene oxide/poly-<scp>l</scp>-glutathione nanocomposite for electrochemical detection of 4-aminophenol in orange juice samplescitations
- 2015Immobilization of myoglobin on Au nanoparticle-decorated carbon nanotube/polytyramine composite as a mediator-free H2O2 and nitrite biosensorcitations
Places of action
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article
Immobilization of myoglobin on Au nanoparticle-decorated carbon nanotube/polytyramine composite as a mediator-free H2O2 and nitrite biosensor
Abstract
<jats:title>Abstract</jats:title><jats:p>A novel composite film was designed for use as a highly selective mediator-free amperometric biosensor and a method was created for accomplishing direct electrochemistry of myoglobin on a multi-walled carbon nanotube and tyramine-modified composite decorated with Au nanoparticles on a glassy carbon electrode. The ultraviolet-visible and electrochemical impedance spectroscopy results showed that myoglobin retained its native conformation in the interaction with Au-PTy-<jats:italic>f</jats:italic>-MWCNT. The surface coverage of Mb-heme-Fe<jats:sup>(II)/(III)</jats:sup> immobilized on Au-PTy-<jats:italic>f</jats:italic>-MWCNT and the heterogeneous electron-transfer rate constant were 2.12 × 10<jats:sup>−9</jats:sup> mol cm<jats:sup>−2</jats:sup> and 4.86 s<jats:sup>−1</jats:sup>, respectively, indicating a higher loading capacity of the nanocomposite for direct electron transfer of Mb onto the electrode surface. The proposed Mb/Au-PTy-<jats:italic>f</jats:italic>-MWCNT biofilm exhibited excellent electrocatalytic behavior toward the reduction of H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> and the oxidation of nitrite with linear ranges of 2 to 5000 μM and 1 to 8000 μM and lower detection limits of 0.01 μM and 0.002 μM, respectively. An apparent Michaelis-Menten constant of 0.12 mM indicated that the Mb immobilized on the Au-PTy-<jats:italic>f</jats:italic>-MWCNT film retained its native activity. This biosensor can be successfully applied to detect H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> and nitrite in disinfectant cream, eye drops, pickle juice and milk samples.</jats:p>