Electrochemical characterization of cetyltrimethyl ammonium bromide modified carbon paste electrode and the application in the immobilization of DNA

Hu, Chengguo; Hu, Shengshui

doi:10.1016/j.electacta.2003.08.022

Cited by 71 publications

(51 citation statements)

References 24 publications

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“…3B that in the low-frequency region, the appearance of a nearly vertical line showed SDS/CPE like as a pure capacitor [24], and in the high-frequency region, the radius of the semicircle is so large that it is nearly parallel to the real part of impedance (Z′). All these show SDS/CPE has some characteristics of the high charge transfer resistance and low exchange current, which indicates that the SDS-modified layer obstructs the electron transfer of the electrochemical probe.…”

Section: Electrochemical Impedance Spectroscopy (Eis) Of Sds/cpementioning

confidence: 98%

“…3B). It is well established that for a diffusive species, the EIS includes a semicircle part and a linear part, of which the semicircle part at high frequencies corresponds to the electron transfer-limited process and the linear part at low frequencies corresponds to the diffusion process [24]. Fig.…”

Section: Electrochemical Impedance Spectroscopy (Eis) Of Sds/cpementioning

confidence: 99%

See 1 more Smart Citation

Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid

Zheng

Zhou

2007

Bioelectrochemistry

140

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Section: Electrochemical Impedance Spectroscopy (Eis) Of Sds/cpementioning

confidence: 98%

Section: Electrochemical Impedance Spectroscopy (Eis) Of Sds/cpementioning

confidence: 99%

Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid

Zheng

Zhou

2007

Bioelectrochemistry

140

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“…Surfactants such as cetyltrimethylammonium bromide adsorbed on the hydrophobic surface of CPE were shown not only to improve electrochemical properties of the transducer but also to be a material for the immobilization of dsDNA [47].…”

Section: Notementioning

confidence: 99%

Electrochemical nucleic acid-based biosensors: Concepts, terms, and methodology (IUPAC Technical Report)

Labuda

Oliveira-Brett

Evtugyn

et al. 2010

Pure and Applied Chemistry

211

113

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An electrochemical nucleic acid (NA)-based biosensor is a biosensor that integrates a nucleic acid as the biological recognition element and an electrode as the electrochemical signal transducer. The present report provides concepts, terms, and methodology related to biorecognition elements, detection principles, type of interactions to be addressed, and construction and performance of electrochemical NA biosensors, including their critical evaluation, which should be valuable for a wide audience, from academic, biomedical, environmental, and food-testing, drug-developing, etc. laboratories to sensor producers.

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“…Surfactant is a linear molecule with a unique molecular structure like hydrophilic head on one side and long hydrophobic tail on other side. Surfactants were extensively used in electro analytical chemistry because of their two properties (a) adsorption at interfaces and (b) aggregation into supramolecular structures 61 Chengguo Hu and Shengshui Hu 62 studied that CTAB form a compact monolayer on the electrode surface with high density of positive charge.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Dopamine in Presence of Ascorbic Acid with Fe-Ag CTAB Nanoparticles Carbon Paste Electrode

2014

Chem Sci Trans

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A novel electro-chemical method was designed to develop a simple, inexpensive, selective and sensitive electrochemical sensor by modifying carbon paste electrode for the simultaneous determination of dopamine (DA) without the interference of ascorbic acid (AA). Chemically modified carbon paste electrode was prepared by the incorporation of iron-silver bimetallic nanoparticles (Fe-AgNps/Fe-AgCTABMCPE) in presence of cationic surfactant Cetyltrimethyl ammonium Bromide (CTAB) was used for the surface modification and the properties of the modified electrode was studied by using the analytical techniques like cyclic voltammetry (CV), differential pulse voltammetry (DPV) and scanning electron microscope (SEM) image. The modified electrode showed a couple of distinct and well-defined redox peaks for DA and AA mixture, which was not observed with bare carbon paste electrode in 0.1 M phosphate buffer solution (PBS) of pH 7.0 with a scan rate of 50 mVs -1 . There was a good enhancement in redox peak current for DA by 3 folds when compared to bare carbon paste electrode. The anodic peak current vs. scan rate was found to be linear with a correlation coefficient of 0.9951 indicating that the reaction is a diffusion controlled process. The anodic peak current (Ip a ) showed a linear relation with concentration of DA with a correlation coefficient of 0.9986 and the detection limit was found to be 3.52×10 -5 M. The detection limit of DA is 0.01 μM with a correlation coefficient of 0.9953 and AA is 0.4 μM with a correlation coefficient of 0.9952 respectively. Hence this chemically modified electrochemical sensor showed a reliable result for the voltammetric determination of AA in the presence of DA and it can be ideal for the practical application of DA in human blood serum and dopamine hydro chloride injection.

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Electrochemical characterization of cetyltrimethyl ammonium bromide modified carbon paste electrode and the application in the immobilization of DNA

Cited by 71 publications

References 24 publications

Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid

Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid

Electrochemical nucleic acid-based biosensors: Concepts, terms, and methodology (IUPAC Technical Report)

Simultaneous Determination of Dopamine in Presence of Ascorbic Acid with Fe-Ag CTAB Nanoparticles Carbon Paste Electrode

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