Single-walled carbon nanotubes functionalized with poly(nile blue A) and their application to dehydrogenase-based biosensors

Du, Pan; Liu, Shuna; Wu, Ping; Cai, Chenxin

doi:10.1016/j.electacta.2007.08.027

Cited by 77 publications

(43 citation statements)

References 105 publications

(88 reference statements)

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“…The amperometric signal decreased at six bilayers, probably because the film was too thick. The substrate diffusion was obstructed, and the action of the electron transfer rate was delayed [32,33]. As a result, five bilayers of MB-MWNTs/HRP were chosen for further investigation.…”

Section: Optimization Of the Amperometric Experimental Conditionsmentioning

confidence: 99%

A Simple Layer‐by‐Layer Assembly Strategy for a Reagentless Biosensor Based on a Nanocomposite of Methylene Blue‐Multiwalled Carbon Nanotubes

Zhang

Liu

et al. 2010

Electroanalysis

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A simple layer-by-layer (LBL) assembly strategy was established for constructing a novel reagentless biosensor based on a nanocomposite of methylene blue multiwalled carbon nanotubes (MB-MWNTs). A nanocomposite of MBMWNTs was obtained by direct premixing and possessed good dispersion in barbital-HCl buffer. Through electrostatic interactions, the nanocomposite of MB-MWNTs could alternately be assembled with horseradish peroxidase (HRP) on the Au electrode modified with precursor films. UV/Vis spectra and scanning electron microscopy (SEM) were applied to reveal the formation of the nanocomposite of MB-MWNTs. The LBL assembly process was also verified by electrochemical impedance spectroscopy (EIS). The MB is a well-established mediator and efficiently facilitated the electron shuttle between the HRP and the electrode, as demonstrated by the cyclic voltammetry (CV) measurements. The as-prepared reagentless biosensor exhibited a fast response for the determination of hydrogen peroxide (H 2 O 2 ) and reached 95% of the steady-state current within 3 s. It was found that the linear response range of the reagentless biosensor for H 2 O 2 was from 4.0 mM to 3.78 mM with a detection limit of 1.0 mM and a sensitivity of 22.5 mA mM À1. The biosensor exhibited a high reproducibility and stability.

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Section: Optimization Of the Amperometric Experimental Conditionsmentioning

confidence: 99%

A Simple Layer‐by‐Layer Assembly Strategy for a Reagentless Biosensor Based on a Nanocomposite of Methylene Blue‐Multiwalled Carbon Nanotubes

Zhang

Liu

et al. 2010

Electroanalysis

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“…Carbon nanotubes have been demonstrated to have the excellent electrocatalytic abilities and antifouling properties, and thus can improve the performances of electrochemical devices [15][16][17][18][19]. In the previous work, we functionalized the SWNTs with poly(nile blue A) and exploited the application of the composites in fabrication of the dehydrogenase-based biosensors [20]. Here, we show the preparation and characterization of the Nb-SWNTs nanocomposite, and fabrication of the novel glucose biosensor based on the reduction of H 2 O 2 by immobilizing glucose oxidase on the composite.…”

Section: Introductionmentioning

confidence: 99%

Development of an amperometric biosensor for glucose based on electrocatalytic reduction of hydrogen peroxide at the single-walled carbon nanotube/nile blue A nanocomposite modified electrode

Zhou

Cai

2008

Journal of Electroanalytical Chemistry

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“…The cyclic voltammograms have two pairs of redox peaks: the left redox peak is attributed to the activity of MB monomer containing in polyMB structure while the right peak is related to the redox reaction of polyMB [35]. Assuming two electron transfer are involved in polyMB redox reaction [49], the surface coverage concentrations (G) of polyMB could calculated from …”

Section: Preparation and Characterization Of Polymb-crgo And Polymb-ementioning

confidence: 99%

Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

et al. 2010

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This study compares the electrocatalytic activities of chemically reduced graphene oxide (crGO) and electrochemically reduced graphene oxide (erGO), which are both noncovalently functionalized with a polyaromatic dye, poly-(methylene blue) (polyMB), toward the oxidation of b-nicotinamide adenine dinucleotide (NADH). PolyMB-crGO and polyMB-erGO composites were obtained via electropolymerization of methylene blue on crGO and GO modified glassy carbon (GC) electrodes, respectively. Cyclic voltammetry (CV) results indicate that these two types of integrated electrodes reveal different electrocatalytic activities. PolyMB-crGO integrated electrode possesses lower catalytic oxidation potential, suggesting higher catalytic activity. The present study is helpful for the understanding and screening of graphene-based advanced carbon nanomaterials for potential electrochemical applications.

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Single-walled carbon nanotubes functionalized with poly(nile blue A) and their application to dehydrogenase-based biosensors

Cited by 77 publications

References 105 publications

A Simple Layer‐by‐Layer Assembly Strategy for a Reagentless Biosensor Based on a Nanocomposite of Methylene Blue‐Multiwalled Carbon Nanotubes

A Simple Layer‐by‐Layer Assembly Strategy for a Reagentless Biosensor Based on a Nanocomposite of Methylene Blue‐Multiwalled Carbon Nanotubes

Development of an amperometric biosensor for glucose based on electrocatalytic reduction of hydrogen peroxide at the single-walled carbon nanotube/nile blue A nanocomposite modified electrode

Comparative Studies on Electrocatalytic Activities of Chemically Reduced Graphene Oxide and Electrochemically Reduced Graphene Oxide Noncovalently Functionalized with Poly(methylene blue)

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