Gold nanoparticles-mesoporous silica composite used as an enzyme immobilization matrix for amperometric glucose biosensor construction

Bai, Yu; Yang, Hua; Yang, Weiwei; Li, Yancai; Sun, Chang Q.

doi:10.1016/j.snb.2006.12.020

Cited by 132 publications

(78 citation statements)

References 37 publications

(50 reference statements)

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“…The sensitivity of the device was slightly dependent on the electrode configuration and the addition of gold nanoparticles or [191] CdTe quantum dots was reported to improve the biosensor response [170,177]. The same beneficial effect due to the conductivity increase in the composite film was also observed for glucose sensing, by the way of glucose oxidase-based electrodes containing either gold nanoparticles [189] or carbon nanostructures [179]. Hydrogen peroxide was also sensitively determined at glassy carbon electrodes covered with horseradish peroxidase immobilized in hexagonal mesoporous silica for which direct electrochemistry of the entrapped protein was also claimed [185].…”

Section: Electrochemical Biosensorsmentioning

confidence: 73%

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Walcarius¹

2008

Electroanalysis

145

101

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Microporous zeolites and ordered mesoporous (organo)silicas have been widely used as electrode modifiers because of their attractive properties (ion exchange and size selectivity of zeolites, well ordered nanoreactors containing a high number of widely accessible active centers in mesoporous (organo)silicas). These properties have been intelligently combined to selected redox processes to improve the response of the resulting modified electrodes or to design novel electrochemical detection schemes. This up-to-date review provides the recent advances made in the electroanalytical applications of zeolite modified electrodes and discusses the interest of ordered mesoporous (organo)silica materials in electroanalysis.

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Section: Electrochemical Biosensorsmentioning

confidence: 73%

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Walcarius¹

2008

Electroanalysis

145

101

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“…Among these, gold nanoparticles (AuNPs) have been considered to have a wide range of potential applications including biomarkers [7], biosensors, [8,9] molecular recognition systems [10,11] and nanoscale electronics etc. [12].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Gold Nanoparticles – Octadecylamine Hybrid Langmuir‐Blodgett Film for Enzyme Sensor

Matharu

Pandey²,

Pandey³

et al. 2009

Electroanalysis

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Mediator free enzyme sensor has been fabricated by covalently immobilizing cholesterol oxidase (ChOx) onto 11-mercaptoundecanoic acid functionalized gold nanoparticles (MUDA-AuNPs) -octadecylamine (ODA) hybrid Langmuir -Blodgett film. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) studies reveal that MUDA-AuNP/ODA LB film has good affinity for ChOx and provides favorable microenvironment for direct electron transfer between enzyme and electrode. Interference free estimation of cholesterol has been realized at 0.3 V with linear range from 25 to 500 mg/dL, detection limit of 23.38 mg/dL, sensitivity of 1.085 mA mM À1 and response time of 20 s at pH 7.0.

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“…[17] Grudzien et al synthesized the bifunctional PMOs with a combination of "flexible" ethane and "bulky" isocyanurate bridging groups. [18] In preparing electroactive hybrid materials, electrochemically active guests such as polyoxometalate, [19] ferrocenyl [20] groups, and enzyme glucose oxidase [21] have been grafted into the mesoporous silica matrix. Comparatively, electroactive PMOs made by co-condensation have advantages over these post-synthetically functionalized materials in that the electroactive organic moieties are homogeneously distributed in the inorganic matrix without severely occupying the inner void space.…”

Section: Introductionmentioning

confidence: 99%

Templated Synthesis of Electroactive Periodic Mesoporous Organosilica Bridged with Oligoaniline

Guo

Mylonakis

Zhang

et al. 2008

Chemistry A European J

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The synthesis and characterization of novel electroactive periodic mesoporous organosilica (PMO) are reported. The silsesquioxane precursor, N,N'-bis(4'-(3-triethoxysilylpropylureido)phenyl)-1,4-quinonene-diimine (TSUPQD), was prepared from the emeraldine base of amino-capped aniline trimer (EBAT) using a one-step coupling reaction and was used as an organic silicon source in the co-condensation with tetraethyl orthosilicate (TEOS) in proper ratios. By means of a hydrothermal sol-gel approach with the cationic surfactant cetyltrimethyl-ammonium bromide (CTAB) as the structure-directing template and acetone as the co-solvent for the dissolution of TSUPQD, a series of novel MCM-41 type siliceous materials (TSU-PMOs) were successfully prepared under mild alkaline conditions. The resultant mesoporous organosilica were characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetry, X-ray diffraction, nitrogen sorption, and transmission electron microscopy (TEM) and showed that this series of TSU-PMOs exhibited hexagonally patterned mesostructures with pore diameters of 2.1-2.8 nm. Although the structural regularity and pore parameters gradually deteriorated with increasing loading of organic bridges, the electrochemical behavior of TSU-PMOs monitored by cyclic voltammetry demonstrated greater electroactivities for samples with higher concentration of the incorporated TSU units.

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Gold nanoparticles-mesoporous silica composite used as an enzyme immobilization matrix for amperometric glucose biosensor construction

Cited by 132 publications

References 37 publications

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Electroanalytical Applications of Microporous Zeolites and Mesoporous (Organo)Silicas: Recent Trends

Functionalized Gold Nanoparticles – Octadecylamine Hybrid Langmuir‐Blodgett Film for Enzyme Sensor

Templated Synthesis of Electroactive Periodic Mesoporous Organosilica Bridged with Oligoaniline

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