Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Glassy carbon electrode"”.
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Electrochemical impedance modelling of the reactivities of dendrimeric poly(propylene imine) DNA nanobiosensors
… reactivities of the nanomaterials on glassy carbon electrode (GCE) as the working electrode.
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Anodic Stripping Voltammetry of Tellurium (IV) in 1.0M NH4, SCN at Rotating Disk Gallium - Thin-Film Electrode.
… voltammetry (ASV), using a gallium-thin film electrode in 1.0M NH4SCN at 60°C has been applied to study the electroanalytical chemistry of Te(IV). Both externally plated and in-situ plated thin-film gallium on rotating glassy carbon disk electrodes are presented. Detection limits of Te(IV) on …
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Preparation and Application of Conducting Polymer-Carbon Nanotube Composite.
… nanometerial study. In this work, we have used carbon nanotubes (CNTs) and polypyrrole (PPy) conducting polymers (CPs) as models to make a nanotube and conducting polymer composite material. Under electro-oxidation condition, the PPy/CNT films can be grown on conventional substrates such as a …
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Electrochemical dynamics of cytochrome P450-3A4 isoenzyme biosensor for protease inhibitor antiretroviral drug
… of Co(Sep)³⁺–modified nafion membrane on a glassy carbon electrode. In this regard, the nafion-Co(Sep)³⁺ composite was prepared by integrating the Co(Sep)³⁺ species into a pre-formed nafion film through manual drop-coating and mixing methods.
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Characterization of polymer-modified electrodes from transient ultramicroelectrode experiments
… chronoamperometric transients of an ultramicroelectrode to the split function derived by Aoki and Osteryoung. An extensive investigation into the effect of noisy data and small bias currents on the diffusion coefficients and concentrations obtained by this analysis is also presented. The …
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The development of an electrochemical sensing device for controlled drugs.
… robust. The analysis is quantitative and, if the electrode/electrolyte combination is designed properly, it can be extremely sensitive and selective. The scientific literature contains many examples of voltammetric analyses of controlled drugs. A square wave voltammetric analysis of the novel …
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İkili ilaç etkin madde karışımlarının elektrokimyasal olarak incelenmesi
… amiloride and hydrochlorothiazide at a glassy carbon electrode has been studied using different voltammetric techniques. The dependence of the peak currents and potentials on pH, concentration, scan rate and nature of the buffer were investigated for all compounds individually. The …
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Water oxidation catalysis beginning with cobalt polyoxometalates: determining the dominant catalyst under electrocatalytic conditions and investigation of the surface properties of Co3O4 nanoparticles
… phase from the reaction (i.e. insoluble or electrode-bound) and have a spectrum of active sites that are more difficult to identify. This Dissertation examines a class of inorganic compounds called polyoxometalates (POMs), and investigates the nature of the kinetically dominant, homogeneous …
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The use of cyclodextrin template-based metal oxide nanomaterials in the development of electrochemical sensors for phenolic endocrine disruptor compounds
… disruptors by modifying the surface area of glassy carbon electrode (GCE). Electrochemical characterization of the iron oxide β-CD nano-composites, studied in 0.1 M potassium chloride (KCl) using chronoamperometry,showed that the surface concentration of the adsorbed composite material was …
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Otimização de um eletrodo de carbono vítreo modificado com nanotubos de carbono para detecção voltamétrica do fungicida carbendazim.
For many years the mercury electrode has been widely used as working electrode in electrochemical analysis. However, new electrode materials, such as the glassy carbon, carbon paste, platinum, gold, among others, are excellent alternatives to the mercury electrode because of the ease of …
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Gold Nanoshells: Synthesis and Applications to In Situ SERS
… activity and poor uniformity of roughened Au electrodes hinder further applications in the solid-liquid interfacial analysis and Pt-group electrocatalysis for fuel cells. The interaction between Nafion and catalysts are of importance for the fuel cell development, but it has not been …
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A spectroscopic and electrochemical study of chlorotitanates in molten salt media
… on-line control to improve operating practices. Electrode kinetics were studied by ac voltammetry. Phase angle information was used to determine the value of the standard rate constant ([alpha) and the transfer coefficient (a) for the reduction couples Ti3+/Ti2+ and Ti2+/Ti0 at a glassy carbon …
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Ionic conductivity and exchange current density of non-aqueous lithium polysulfide electrolyte
… in non-aqueous electrolytes to enable flowable electrodes, have high theoretical energy density and low raw materials cost. To achieve greater electrode-level energy density, higher sulfur concentrations are needed. In a given electrolyte system, sulfur charge storage capacity (e.g. mAh/g …
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PEDOT Electrodes as Redox Mediators for Determination of Antioxidants in Beverages
… agents etc. Cyclic voltammetry at inert electrodes is another method for antioxidant determination. Although this method is easy to apply and gives rapid results, the sensitivity of an electrode with a 1 mm dia. is not adequate to analyse antioxidants at levels present in beverages. In …
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Nanocomposite immunosensor for anti-transglutaminase antibody
… as a noval sensor platform on a glassy carbon electrode (GCE). The OvoxPpy was then doped with gold-nanoparticles (GNP) by electrodeposition using cyclic voltammetry to form GNP|OvoxPpy||GCE electrode system. Morphology and size of the GNP|OvoxPpy||GCE nanocomposite were …
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Green Carbon Quantum Dots Based Electrochemical Sensors for Analysis of Neurotransmitters
… described the synthesis and characterization of carbon-based quantum dots/copper oxide nanocomposite prior to the modification of a glassy carbon electrode for neurotransmitters detection (dopamine (DA), epinephrine (EP), and norepinephrine (NE)). The two carbon-based quantum dots were prepared …
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Immunosensors developed on clathrate platform compounds
… These compounds were drop coated onto commercial glassy carbon electrode (GCE) to produce thin films. Scan rate dependent cyclic voltammetry (CV) confirmed the electrodynamics of the thin films to be consistent with monolayer diffusion (De = 1.37x10-21 cm2/s flourene derivative and De = 9.79x10-21 …
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Model electrode structures for studies of electrocatalyst degradation
… of nanoparticles of Pt or Pt-based alloys on carbon supports. Understanding the role of the nanoparticle size and structure on the catalytic activity and degradation is needed to optimize the fuel cell performance and reduce the noble metal loading. Electrocatalyst degradation is believed to …
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Electrochemical Synthesis of Silver Nanoparticles for Applications in Nitrate Detection, Catalysis and Antibacterial Activity
… nanoparticles were successfully deposited at a glassy carbon electrode using a double pulse or a single pulse technique. For the double pulse technique, a pulse at a potential of E1 was applied to instantaneously nucleate nanoparticle seeds. Then, a longer pulse at E2 was applied to grow the …
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Oxygen reduction reaction on carbon supported dispersed platinum nanoparticles and extended platinum surfaces
… by the development of platinum supported carbon electrodes. The surface morphology was modified by varying the platinum loading, such that the surface was taken from isolated nanoparticles to an extended surface. The effects of the changes in surface morphology and particle size on the ORR …
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