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In Nanostructured Materials for Electrochemical Biosensors (2009)
posted to biosensors electrochemical nanomaterials
by uyogesh
on 2009-03-15 18:55:46
 (0)
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In Biosensors: Properties, Materials and Applications (2009)
posted to biosensors catalase nanomaterials
by uyogesh
on 2009-03-15 18:50:48
(0)
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Sensors, Vol. 9, No. 3. (March 2009), pp. 1821-1844.
posted to catalase direct electrocatalysis electrochemical electrochemistry hydrogen nanomaterials peroxide sensors
by uyogesh
on 2009-03-15 18:42:26
(0)
Abstract
Catalase (CAT) is a heme enzyme with a Fe(III/II) prosthetic group at its redox centre. CAT is present in almost all aerobic living organisms, where it catalyzes the disproportionation of H2O2 into oxygen and water without forming free radicals. In order to study this catalytic mechanism in detail, the direct electrochemistry of CAT has been investigated at various modified electrode surfaces with and without nanomaterials. The results show that CAT immobilized on nanomaterial modified electrodes shows excellent catalytic activity, high sensitivity ...
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Analytical Biochemistry (01 March 2009)
posted to biocomposite carbon electrocatalysis electrodes epinephrine film modified multiwall nanotubes norepinephrine
by uyogesh
on 2009-03-15 18:34:17
(0)
Abstract
A novel biocomposite film (MWCNTs-P NDGAChi ) which contains multi-walled carbon nanotubes (MWCNTs) along with the incorporation of poly(nordihydroguaiaretic acid) and chitosan co-polymer (P NDGAChi ) has been synthesized on gold electrode by potentiostatic methods. The presence of MWCNTs in the biocomposite film enhances P NDGAChi ’s surface coverage concentration (Γ) on the electrode and decreases degradation of P NDGAChi during cycling. The biocomposite film also exhibits promising enhanced electrocatalytic activity towards the oxidation of biochemical compounds such as epinephrine ...
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Talanta (24 February 2009)
posted to bromide carbon catalase didodecyldimethylammonium direct electrocatalysis electrochemistry hydrogen multiwalled nanotubes peroxide
by uyogesh
on 2009-03-15 18:33:42
(0)
Abstract
The direct electrochemistry of catalase (CAT) at didodecyldimethylammonium bromide (DDAB) present on nafion dispersed multiwalled carbon nanotubes (MWCNTs-NF) modified glassy carbon electrode (GCE) has been reported. The presence of DDAB in MWCNTs-NF-CAT film enhances the surface coverage concentration of CAT (Fe III/II ) to 48%. Similarly, in presence of DDAB, there is a 57% enhancement in electron transfer rate ( k s ) with 66% increase in CAT stability. And the same Fe III/II redox couple exhibits linear dependence with ...
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Sensors, Vol. 8, No. 11. (November 2008), pp. 7191-7212.
posted to biosensors carbon dna electrochemical hybrid nanoparticles nanotubes sensors
by uyogesh
on 2009-03-15 18:30:14
(0)
Abstract
Innovations in the field of electrochemical sensors and biosensors are of much importance nowadays. These devices are designed with probes and micro electrodes. The miniaturized designs of these sensors allow analyses of materials without damaging the samples. Some of these sensors are also useful for real time analysis within the host system, so these sensors are considered to be more advantageous than other types of sensors. The active sensing materials used in these types of sensors can be any material that ...
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Electroanalysis, Vol. 20, No. 21. (2008), pp. 2324-2332.
posted to electrocatalysis electrodes hexachloroiridate modified oxide platinum ruthenium
by uyogesh
on 2009-03-15 18:25:34
(0)
Abstract
Electrochemically active ruthenium oxide (RuOxsdotnH2O), ruthenium oxide/hexachloroiridate (RuOxsdotnH2O/IrCl62-), and ruthenium oxide/hexachloroiridate/platinum (RuOxsdotnH2O/IrCl62-/Pt) hybrid films have been prepared from the mixture of Ru3+, IrCl62-, and PtCl62- ions in an acidic aqueous solution. The repetitive cyclic voltammetry (CV) has been used for the film preparation process. The electrochemical properties and the growth mechanism of the above mentioned different kinds of hybrid films have been investigated using CV and electrochemical quartz crystal microbalance. The morphological and quantitative analyses have been carried out using scanning ...
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Analytica Chimica Acta, Vol. 636, No. 1. (16 March 2009), pp. 19-27.
posted to acid adenine carbon composite deoxyribonucleic dna electrocatalysis electrodes film guanine modified multiwall nanotubes thymine
by uyogesh
on 2009-03-15 18:23:28
(0)
Abstract
A composite film (MWCNTs–PNF) which contains multi-walled carbon nanotubes (MWCNTs) along with the incorporation of poly(new fuchsin) (PNF) has been synthesized on glassy carbon electrode (GCE), gold (Au) and indium tin oxide (ITO) by potentiostatic methods. The presence of MWCNTs in the composite film enhances surface coverage concentration ( Γ ) of PNF to ≈176.5%, and increases the electron transfer rate constant ( k s ) to ≈346%. The composite film also exhibits promising enhanced electrocatalytic activity towards the mixture of ...
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Talanta, Vol. 78, No. 3. (15 May 2009), pp. 896-902.
posted to acid carbon electrocatalysis electrodes hydrogen modified multiwall nanotubes oxygen peroxide trichloroacetic
by uyogesh
on 2009-03-15 18:22:20
(0)
Abstract
A conductive biocomposite film (MWCNTs-NF-Hb) containing multi-walled carbon nanotubes (MWCNTs) incorporated with entrapped haemoglobin (Hb) in nafion (NF) has been synthesized on glassy carbon electrode (GCE), gold (Au), indium tin oxide (ITO) and screen printed carbon electrode (SPCE) separately by potentiostatic methods. The presence of both MWCNTs and NF in the biocomposite film enhances the surface coverage concentration ( Γ ), and increases the electron transfer rate constant ( K s ) to 132%. The biocomposite film exhibits a promising enhanced ...
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Sensors, Vol. 8, No. 1. (21 January 2008), pp. 290-313.
posted to biosensors electroanalysis electrochemical nano nanotechnology nanowires sensors
by uyogesh
on 2008-03-07 06:36:08
(0)
Abstract
The development and application of nanowires for electrochemical sensors and biosensors are reviewed in this article. Next generation sensor platforms will require significant improvements in sensitivity, specificity and parallelism in order to meet the future needs in variety of fields. Sensors made of nanowires exploit some fundamental nanoscopic effect in order to meet these requirements. Nanowires are new materials, which have the characteristic of low weight with extraordinary mechanical, electrical, thermal and multifunctional properties. The advantages such as size scale, aspect ...
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Anal. Lett., Vol. 41, No. 2. (2008), pp. 210-243.
posted to carbon cnts composite double dwcnts multi mwcnts nano nanotubes polymer single swcnts walled
by uyogesh
on 2008-03-07 06:24:38
(0)
Abstract
Carbon Nanotubes (CNTs) with polymers are promising new sensing materials for biosensors, which have the characteristics of low weight of extraordinary mechanical, electrical, thermal, and multifunctional properties. The size scale, aspect ratio, and properties of CNTs provide advantages in a variety of sensor applications. The various processing methods for these nanocomposites are discussed in particular, CNT synthesis, purification of CNTs, pretreatment and functionalization of CNTs, different dispersion methods, and electropolymerization of the monomers. The advantages of these composite modified electrodes toward ...
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J Electrochem Soc, Vol. 154, No. 11. (2007)
posted to carbon composite electrodes epigallocatechin film functionalized gallate halogen modified multiwall nadh nanotubes neurotransmitters oxoanions oxyanions sulfur
by uyogesh
on 2008-03-07 06:22:09
(0)
Abstract
A conductive composite film which is composed of functionalized multiwalled carbon nanotubes (f-MWCNTs) with poly(neutral red) (PNR) has been synthesized using the potentiostatic method. It is produced on glassy carbon, gold and transparent semiconductor tin oxide electrodes for electrocatalysis, electrochemical quartz crystal microbalance (EQCM), and scanning electron microscopy (SEM) studies. The incorporation of PNR on the f-MWCNTs is revealed by the EQCM technique and their morphology has been studied using the SEM method. The composite film exhibits a promising electrocatalytic activity ...
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Sensors and Actuators B: Chemical, Vol. In Press, Corrected Proof
posted to c carbon composite dopamine electrocatalysis electrodes epinephrine film modified multi-wall nanotubes neurotransmitters vitamin
by uyogesh
on 2008-03-07 06:16:19
(0)
Abstract
A novel conductive composite film containing multi-walled carbon nanotubes (MWCNTs) with poly(methylene blue) (PMB) has been synthesized on glassy carbon electrode (GCE), gold and indium tin oxide electrodes by potentiostatic methods. The presence of MWCNTs in the composite film enhance the surface coverage concentration ([Gamma]) of PMB, increased the electron transfer rate constant (Ks) by 44.53% and decreased the degradation of PMB during the cycling. The composite film exhibits a promising higher electrocatalytic activity towards the oxidation of ascorbic acid (AA), ...
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Talanta, Vol. 74, No. 5. (15 February 2008), pp. 1659-1669.
posted to c carbon composite electrocatalysis electrodes film halogen l-cysteine modified multi-walled nanotubes oxyanions vitamin
by uyogesh
on 2008-03-07 06:13:43
(0)
Abstract
A novel conductive biocomposite film (MWCNTs-DNA-cyt c) which contains multi-walled carbon nanotubes (MWCNTs) along with the incorporation of DNA and cytochrome c (cyt c) has been synthesized on glassy carbon electrode (GCE), gold (Au), indium tin oxide (ITO) and screen printed carbon electrode (SPCE) by potentiostatic methods. The presence of both MWCNTs and DNA in the biocomposite film enhances the surface coverage concentration ([Gamma]), increases the electron transfer rate constant (Ks) up to 21% and decreases the degradation of cyt c ...
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Carbon, Vol. 45, No. 14. (November 2007), pp. 2783-2796.
posted to adenine carbon determination gold guanine multi-walled nanotubes particles simultaneous thymine tyrosine
by uyogesh
on 2008-03-07 06:11:43
(0)
Abstract
A conductive composite film containing functionalized multi-walled carbon nanotubes (fMWCNTs), gold nanoparticles (Au) with hydroxypropyl-[beta]-cyclodextrin (HP[beta]CD) as catalysts have been synthesized on glassy carbon, gold and on indium tin oxide electrodes by potentiostatic methods. The presence of fMWCNTs and HP[beta]CD in the composite film enhances the active surface coverage concentration of Au by 397.0%. The presence of nanoparticles of gold catalyst in the film enhances the functional properties and produces an overall increase in the sensitivity of the modified electrodes. These ...
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Analytical Biochemistry, Vol. 365, No. 1. (1 June 2007), pp. 122-131.
posted to c carbon composite electrocatalysis electrodes film gold modified multiwall nano nanotubes neurotransmitters platinum vitamin
by uyogesh
on 2008-03-07 06:09:15
along with 2 people and 1 group
thiaguthiaguchem
thangavel
Prof. Shen-Ming Chen Group
(0)
Abstract
A unique bimetallic, nano platinum (Pt) with nano gold (Au) on nafion (NF) incorporated with functionalized multiwall carbon nanotubes (f-MWCNTs) composite film (f-MWCNTs-NF-PtAu) was developed by the potentiostatic method. The composite film exhibits promising efficient catalytic activity towards the oxidation of mixture of biochemical compounds and simultaneous measurement of ascorbate anion, epinephrine and urate anion in aqueous buffer solution (pH 6.75). Both, the cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used for the measurement of electroanalytical properties of neurotransmitters ...
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Electrochimica Acta, Vol. 52, No. 19. (25 May 2007), pp. 5985-5996.
posted to acid c carbon composite dopamine electrocatalysis electrodes film functionalized modified multiwall nanotubes uric vitamin
by uyogesh
on 2008-03-07 06:06:30
(0)
Abstract
A novel conductive composite film containing functionalized multi-walled carbon nanotubes (f-MWCNTs) with poly (neutral red) (PNR) was synthesized on glassy carbon electrodes (GC) by potentiostatic method. The composite film exhibited promising electrocatalytic oxidation of mixture of biochemical compounds such as ascorbic acid (AA), dopamine (DA) and uric acid (UA) in pH 4.0 aqueous solutions. It was also produced on gold electrodes by using electrochemical quartz crystal microbalance technique, which revealed that the functional properties of composite film were enhanced because of ...
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