Ionic-liquid/NH2-MWCNTs as a highly sensitive nano-composite for catalase direct electrochemistry

Rahimi, Parvaneh; Rafiee‐Pour, Hossain‐Ali; Ghourchian, Hedayatollah; Norouzi, Parviz; Ganjali, Mohammad Reza

doi:10.1016/j.bios.2009.10.020

Cited by 86 publications

(55 citation statements)

References 34 publications

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“…The uniform nanocomposite might be formed by the good interaction of graphene with IL through cation-p and/or p-p interactions [43] that have also been observed for IL with other carbon nanomaterials such as mesoporous carbon [44] and MWNTs [51]. The porous structure of the nanocomposite is evident from the high magnification image (Figure 2d).…”

Section: Morphology and Composition Characterizations Of The Samplesmentioning

confidence: 86%

“…Very recently, IL has been extensively used as a binder to prepare carbon paste electrodes for broad electrochemical applications [45][46][47][48][49][50]. IL composite electrodes fabricated from SWNTs [25], MWNTs [51] and mesoporous carbon [44] have been developed and their electrocatalytic behaviours have been demonstrated. However, the use of graphene with IL for the electrochemical detection of NO has not been explored until now.…”

Section: Introductionmentioning

confidence: 99%

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Highly Sensitive Nitric Oxide Sensing Using Three‐Dimensional Graphene/Ionic Liquid Nanocomposite

Guo

2010

Electroanalysis

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A nanocomposite gel with a uniform porous structure and well-controlled compositions prepared by mixing threedimensional graphene material with an ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, is used for nitric oxide detection. It shows a fast response of less than 4 seconds, an excellent sensitivity of 11.2 mA cm À2 (mmol/ L) À1 and an extremely low detection limit of 16 nM with a signal-to-noise ratio of 3 (S/N = 3), a performance superior to that of reported works based on carbon nanotubes and nanoparticles. The high sensitivity is attributed to the large electroactive surface area of the graphene gel nanocomposite towards nitric oxide oxidation. The electrochemical behavior of the gel nanocomposite is investigated and explained.

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Section: Morphology and Composition Characterizations Of The Samplesmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Nitric Oxide Sensing Using Three‐Dimensional Graphene/Ionic Liquid Nanocomposite

Guo

2010

Electroanalysis

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“…The apparent charge transfer rate constant and transfer coefficient for electron transfer between the electrode surface and enzyme were reported as 2.23 s −1 and 0.45, respectively. The immobilized catalase exhibited a relatively high sensitivity (4.9 nA/nM) toward hydrogen peroxide (Rahimi et al, 2010). Table 3, summarized some important ILs which are immiscible in water and they have been widely used in construction of electrochemical sensors and biosensors.…”

Section: Ionic Liquids Used In Electrochemical Biosensorsmentioning

confidence: 99%

Application of Room Temperature Ionic Liquids in Electrochemical Sensors and Biosensors

Faridbod¹,

Ganjali²,

Norouzi³

et al. 2011

Ionic Liquids: Applications and Perspectives

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“…The slope was 24 mV/pH over a pH range of 4.5 to 8.0. This value was much smaller than the ideal Nernsts value for the one electron and one proton process [25,26]. The reason might be the biocompatible micro-environment provided by l-Cys capped CdS QDs and CS resulted in the electrode more stable to pH changes [26], influences the protonation state of trans ligands to the heme iron and amino acids around the heme, or the protonation of the water molecules coordinated to the central iron [27].…”

Section: Effect Of Ph On the Electrochemical Behavior Of Hemoglobinmentioning

confidence: 74%

A Highly Sensitive Hydrogen Peroxide Biosensor Based on Hemoglobin Immobilized on Cadmium Sulfide Quantum Dots/Chitosan Composite Modified Glassy Carbon Electrode

et al. 2014

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An L‐cysteine capped cadmium sulfide‐chitosan nanocomposite has been synthesized, characterized and used for surface modification of a glassy carbon electrode. With direct electron transfer, hemoglobin (Hb) adsorbed strongly on the nanocomposite and displayed excellent bioelectrocatalysis for H2O2. The biosensor was capable of reducing H2O2 at −0.35 V, with a detection limit of 3.13 nM, linearity in the range of 15 nM to 10 µM and a response time of less than 2 s. The MichaelisMenten constant (KM) was 0.57 nM, attesting high bioelectrocatalysis of immobilized Hb for H2O2. Reproducibility of the fabrication method was very satisfactory with a relative standard deviation of 5.3 %. The biosensor lost only 6.5 % of its original response after 7 days when stored in a pH 7.4 PBS at 4 °C.

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Ionic-liquid/NH2-MWCNTs as a highly sensitive nano-composite for catalase direct electrochemistry

Cited by 86 publications

References 34 publications

Highly Sensitive Nitric Oxide Sensing Using Three‐Dimensional Graphene/Ionic Liquid Nanocomposite

Highly Sensitive Nitric Oxide Sensing Using Three‐Dimensional Graphene/Ionic Liquid Nanocomposite

Application of Room Temperature Ionic Liquids in Electrochemical Sensors and Biosensors

A Highly Sensitive Hydrogen Peroxide Biosensor Based on Hemoglobin Immobilized on Cadmium Sulfide Quantum Dots/Chitosan Composite Modified Glassy Carbon Electrode

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