Glucose biosensor based on glucose oxidase immobilized on a nanofilm composed of mesoporous hydroxyapatite, titanium dioxide, and modified with multi-walled carbon nanotubes

AbstractThis research aims of compare the impact of the mass fraction of multi-walled carbon nanotubes (MWCNTs) and titanium dioxide (TiO2) nano additive on the tribological and thermophysical attributes of turbine meter oil. These attributes include the average friction coefficient, pressure drop, wear, flash point, pour point, relative viscosity, kinematics viscosity, and viscosity index. The pressure drops and the average friction coefficient inside the copper tube were simulated and compared with experimental results. In this study, for the synthesis of nano lubricants from turbine meter oil as a pure fluid and from MWCNTs and TiO2 as nano additives in the mass fraction of 0.05, 0.1, 0.2, 0.3, and 0.4 wt.% and from oleic acid and Triton x100 as surfactants were utilized. The results illustrated that the wear depth of copper pins in the presence of nano lubricant with 0.4 wt.% of MWCNTs and 0.1 wt.% TiO2 was improved by 88.26% and 71.43%, respectively. Increasing 0.3 wt.% of TiO2 and MWCNTs into the oil caused to improvement in viscosity index. The simulation data and experimental data for the pressure drop were closer together and indicated a minor error that the maximum error is less than 10%.

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Glucose Biosensor Based on a Glassy Carbon Electrode Modified with Multi-Walled Carbon Nanotubes-Chitosan for the Determination of Beef Freshness

Food Analytical Methods ◽

10.1007/s12161-017-0793-6 ◽

2017 ◽

Vol 10 (8) ◽

pp. 2667-2676 ◽

Cited By ~ 6

Author(s):

Eric Uwimbabazi ◽

Marie Rose Mukasekuru ◽

Xiulan Sun

Keyword(s):

Carbon Nanotubes ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Glucose Biosensor ◽

Carbon Electrode ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Direct Electrochemistry of Glucose Oxidase Immobilized on Multi-walled Carbon Nanotubes Modified Sputtering Deposited Gold Electrodes

Proceedings of the 14th Asia Pacific Confederation of Chemical Engineering Congress ◽

10.3850/978-981-07-1445-1_343 ◽

2012 ◽

Author(s):

You-Syuan Jhai ◽

Wen Wang ◽

Meng-Jiy Wang ◽

Chiapyng Lee

Keyword(s):

Carbon Nanotubes ◽

Glucose Oxidase ◽

Direct Electrochemistry ◽

Gold Electrodes ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Glucose Oxidase Immobilized on a Functional Polymer Modified Glassy Carbon Electrode and Its Molecule Recognition of Glucose

Polymers ◽

10.3390/polym11010115 ◽

2019 ◽

Vol 11 (1) ◽

pp. 115 ◽

Cited By ~ 1

Author(s):

Yan-Na Ning ◽

Bao-Lin Xiao ◽

Nan-Nan Niu ◽

Ali Moosavi-Movahedi ◽

Jun Hong

Keyword(s):

Carbon Nanotubes ◽

Electron Transfer ◽

Glucose Oxidase ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Functional Polymer ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

In the present study, a glucose oxidase (GluOx) direct electron transfer was realized on an aminated polyethylene glycol (mPEG), carboxylic acid functionalized multi-walled carbon nanotubes (fMWCNTs), and ionic liquid (IL) composite functional polymer modified glassy carbon electrode (GCE). The amino groups in PEG, carboxyl groups in multi-walled carbon nanotubes, and IL may have a better synergistic effect, thus more effectively adjust the hydrophobicity, stability, conductivity, and biocompatibility of the composite functional polymer film. The composite polymer membranes were characterized by cyclic voltammetry (CV), ultraviolet-visible (UV-Vis) spectrophotometer, fluorescence spectroscopy, electrochemical impedance spectroscopy (EIS), and transmission electron microscopy (TEM), respectively. In 50 mM, pH 7.0 phosphate buffer solution, the formal potential and heterogeneous electron transfer constant (ks) of GluOx on the composite functional polymer modified GCE were −0.27 V and 6.5 s−1, respectively. The modified electrode could recognize and detect glucose linearly in the range of 20 to 950 μM with a detection limit of 0.2 μM. The apparent Michaelis-Menten constant (Kmapp) of the modified electrode was 143 μM. The IL/mPEG-fMWCNTs functional polymer could preserve the conformational structure and catalytic activity of GluOx and lead to high sensitivity, stability, and selectivity of the biosensors for glucose recognition and detection.

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