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Dissertations / Theses on the topic 'Gold electrode'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Iranpour, Bahar. "Gold electrode electrochemistry in protein based solar cells." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42218.

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The high quantum efficiency of photosynthetic reaction centers makes them candidates for use in solar energy harvesting devices. A bio-photovoltaic cell can be made by dissolving reaction centers and two mediators, such as quinone and cytochrome c, in the conductive electrolyte of an electrochemical cell. The mediators transfer the photo-generated charges to the electrodes upon illumination. So far such protein-based devices have shown low overall power conversion efficiency. Previously it has been shown that slow charge transfer limits the efficiency of these devices. Moreover, it has been ob

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2

Santana-Aguiar, Francisco Aurelio. "Characterisation of electrode microarrays produced photolithographically and with thiol self-assembled monolayers on gold electrodes." Thesis, Durham University, 2009. http://etheses.dur.ac.uk/45/.

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The macroscale electrochemical theory breaks down with microstructures smaller than the dimensions of the diffusion layer, showing that such electrodes have significant quantitative effects and qualitative advantages. The great advantage of microelectrodes over macroelectrodes is the minimisation of interference, which gives rise to much lower detection limits. Microelectrodes have much reduced ohmic drops and capacitive effects and can be used in the absence of supporting electrolyte. These features have opened a growing interest in the fabrication and application of microelectrodes in variou

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3

Cafe, Peter F. "Towards reliable contacts of molecular electronic devices to gold electrodes." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3870.

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SYNOPSIS OF THIS THESIS The aim of this thesis is to more fully understand and explain the binding mechanism of organic molecules to the Au(111) surface and to explore the conduction of such molecules. It consists of five discreet chapters connected to each other by the central theme of “The Single Molecule Device: Conductance and Binding”. There is a deliberate concentration on azine linkers, in particular those with a 1,10-phenanthroline-type bidentate configuration at each end. This linker unit is called a “molecular alligator clip” and is investigated as an alternative to the thiol linker

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4

Cafe, Peter F. "Towards reliable contacts of molecular electronic devices to gold electrodes." University of Sydney, 2008. http://hdl.handle.net/2123/3870.

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PhD<br>SYNOPSIS OF THIS THESIS The aim of this thesis is to more fully understand and explain the binding mechanism of organic molecules to the Au(111) surface and to explore the conduction of such molecules. It consists of five discreet chapters connected to each other by the central theme of “The Single Molecule Device: Conductance and Binding”. There is a deliberate concentration on azine linkers, in particular those with a 1,10-phenanthroline-type bidentate configuration at each end. This linker unit is called a “molecular alligator clip” and is investigated as an alternative to the thiol

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5

Nandhakumar, Iris. "The early stages of CdTe epitaxial growth on gold single crystal electrode surfaces." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242869.

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6

Santos, Vanessa Nascimento dos. "Gold electrode modified with inorganic complexes applied as electrochemical sensors for nitric oxide." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7264.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>The aim of this work is to study the surface modification of gold electrode with the trans-[Ru(NH3)4(tina)(SO4)]+ (Au/trans-[Ru(NH3)4(tina)(SO4)]+) and trans-[Fe(cyclam)(NCS)2]+ (Au/trans-[Fe(cyclam)(NCS)2]+) complexes ion, emplyoing the electrodeposition and self-assembled monolayer techniques, respectively; and evaluate the potentiality of these modified electrodes as electrochemical sensors for detection and quantification of NO. Cyclic voltammetry and electrochemical quartz crystal microbalance results suggest that the depo

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7

Young, Samantha. "Designing the Nanoparticle/Electrode Interface for Improved Electrocatalysis." Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23723.

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Nanoparticle-functionalized electrodes have attracted attention in areas such as energy production and storage, sensing, and electrosynthesis. The electrochemical properties of these electrodes depend upon the nanoparticle properties, e.g., core size, core morphology, surface chemistry, as well as the structure of the nanoparticle/electrode interface, including the coverage on the electrode surface, choice of electrode support, and the interface between the nanoparticle and the electrode support. Traditionally used methods of producing nanoparticle-functionalized electrodes lack sufficient c

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8

Lakbub, Jude. "Fabrication of Chemically Modified Nanometer-sized Gold Electrodes and Their Application in Electrocatalysis at Pt Nanoparticles." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1385.

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Hydrogen evolution via proton reduction occurs at a high rate at the surface of Pt than at Au electrodes. Using cyclic voltammetry, chemically modified nanometer-sized Au electrodes, prepared by the Laser-Assisted Puller Method, were employed to examine current amplification by electrocalysis at Pt nanoparticles adsorbed on the modified Au electrode surfaces. The electrodes were modified with Self-Assembled Monolayers (SAMs) of cysteamine and soaked in Pt colloid solutions overnight. Monitoring the decrements of the characteristic steady-state catalytic current for proton reduction indicated t

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9

Gibbon-Walsh, Kristopher Bryant. "Speciation of trace metals and metalloids in natural waters using the vibrating gold microwire electrode." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569659.

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This work reports the use of the vibrating gold microwire electrode, with new methods developed for the speciation of Zn, Cu, Mn and As at natural levels in waters of neutral pH. Trace metals and metalloids can be distributed as different species in the environment, which can control mobility, toxicity and bioavailability and in turn depends on many complex factors. Analysis of this distribution (speciation) can provide an understanding of the relationship between such elements and their relationship with organisms in marine environments and humans through contaminated drinking water supplies.

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10

Remes, Daniel. "Biosensor based on a MOS capacitor with an internal reference electrode." Thesis, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19829.

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<p>In this project a new type of metal oxide semiconductor (MOS) sensor for biosensing was investigated. With the use of a porous gold film as aninternal reference electrode, measurements of pH were performed in liquid. This new approach for liquid measurements demands new methods andstudies to increase the conductivity and adhesion in liquid of the porous gold film. The films have been deposited, either by sputtering orevaporation. Extensive studies included the investigation of depositions parameters on film structure and investigating the film morphology. Thesurface structure was studied wi

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Zamlynny, Volodymyr. "Electrochemical studies of adsorption of insoluble pyridine surfactants and their mixtures at a gold(111) electrode." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ33292.pdf.

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Ridley, Paul. "Underpotential deposition of lead on gold and platinum (111) electrode surfaces investigated by scanning tunnelling microscopy." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343615.

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13

Wanibuchi, Mizue. "Three-dimensional Structural Effects of Porous Materials on the Direct-electron-transfer-type Bioelectrocatalysis of Bilirubin Oxidase." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263704.

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14

Chuang, Janet Duanping. "Electrochemistry of soluble methane monooxygenase on a modified gold electrode : implications for chemical sensing in natural waters." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/31156.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.<br>Includes bibliographical references (p. 87-90).<br>This work explored the possibility of using the soluble methane monooxygenase (MMO) enzyme, a three-component enzyme which catalyzes the oxygenation of methane and other substrates, to design a methane sensor for use in natural waters. Such a sensor would be useful for monitoring lake biogeochemistry, including the potential for lakes to be a source of methane into the atmosphere. An op amp-based potentiostat was constructed, and a LabV

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15

Zhang, Kun. "Spectroelectrochemical Investigations of the Interaction of Flotation Reagents with Gold Surfaces." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/366588.

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This thesis presents the results of a spectroelectrochemical investigation into the interactions of two flotation collectors (mercaptobenzothiazole (MBT) and dithiophosphate (DTP)) with gold electrode and nanorods surfaces. The relevant compounds and ligands of these two collectors were characterised and identified by Raman spectroscopy and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Gold nanorods (Au NRs) with average aspect ratio of 4.04 ± 0.08 were synthesised and reacted with MBT and DTP. Gold particle flotation was investigated using controlled potenti

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16

Revesz, Erika. "Second harmonic generation spectroscopy of the potential induced surface reconstruction of the gold(110) electrode in perchloric acid electrolyte." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9925.

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In-situ optical second harmonic generation (SHG) spectroscopy was used to examine the potential induced surface reconstruction of a Au (110) surface in a solution of 0.01 M HClO$\sb4.$ The SHG rotational anisotropy was measured at different potentials using the fundamental beam (1064 nm) of the Nd:YAG laser. Analysis of the data shows that the overall symmetry of the surface is C$\rm\sb{s}.$ It was also found that the second order nonlinear susceptibility for both the reconstructed and the unreconstructed surface have a large three fold symmetry component. We suggest that the three-fold symmet

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17

Medeiros, Natália Goedtel. "Desenvolvimento de biossensor baseado em tirosinase para determinação de adenosina." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/170374.

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Neste trabalho relata-se pela primeira vez a determinação de adenosina por um biossensor baseado em tirosinase. O biossensor foi desenvolvido mediante a modificação de um eletrodo de carbono impresso (SPE) com nanopartículas de ouro (AuNPs), tirosinase (Tyr) e Nafion, denominado biossensor Nafion/Tyr/AuNPs/SPE. As AuNPs sintetizadas possuem diâmetro médio de 15,0 ± 1,1 nm e sua função é melhorar a via de condução de elétrons entre a enzima e o eletrodo. Utilizou-se o aprisionamento com filme Nafion® para evitar a lixiviação enzimática da superfície do eletrodo. A tirosinase imobilizada apresen

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18

Pouliwe, Antibe. "Electrochemical Studies of The Interaction Between DNA and a Compound Having Anticancer Properties." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1352.

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Electrochemical method has been used to study the interaction between DNA and the compound N-(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-N'-(2-imidazoyl)urea having anticancer properties. A DNA modified nanometer-sized gold electrode was prepared by surface modification of a bare gold electrode using cysteamine. These electrodes have been characterized using electrochemical techniques and were used to study the interaction between DNA and the compound. Our results showed an increase in the adsorption peak current and a negative shift of E1/2 in the oxidation of ferroc

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19

Olowu, Rasaq Adewale. "Impedimetric and electrode kinetic dynamics of DNA aptamer nanobiosensors for estrogeneous endocrine disruptors." University of the Western Cape, 2011. http://hdl.handle.net/11394/8455.

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Philosophiae Doctor - PhD<br>In this work, DNA aptamer biosensor systems were developed for the detection of l7p-estradiol - an estrogeneous endocrine disrupting chemical (EDC). Endocrine disrupting chemicals are group of compounds that impact negatively on the endocrine system of humans and wildlife. High concentrations of l7p-estradiol in water or food chain disrupts the physiology of the endocrine system of various animal species, leading to feminisation in fish and stimulates the proliferation of cancer cells in humans. Aptasensor systems for the determination of l7pestradiol were prepared

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20

Triffaux, Eleonore. "Interfacial study of a sensing platform for MDM2, based on the self-assembly of a p53 peptide on a gold electrode." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/217746.

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Ce travail porte sur l’étude électrochimique et par microscopie de fluorescence in situ de l’auto-assemblage, sur électrode d’or, de monocouches d’aptamères peptidiques de la protéine p53 en vue de la détection de la protéine MDM2. L’utilisation de nouvelles sondes de reconnaissance moléculaire telles que les aptamères peptidiques a été considérée en tant qu’alternative à l’utilisation d’anticorps. Les aptamères peptidiques sont des séquences synthétiques de peptide se liant à la protéine cible avec une affinité et une spécificité élevées. La première partie de ce travail porte sur l’étude éle

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21

AragÃo, Janmille da Silva. "Electrochemical Determination of diethylstilbestrol at glassy carbon electrode modified with gold nanoparticles and a film of multi-wall carbon nanotubes and cobalt phthalocyanine." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16652.

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This paper describes the development of an electrochemical sensor glassy carbon modified with gold nanoparticles and a film of multiâwalled carbon nanotube and cobalt phthalocyanine (CoPc-fMWCNTs/AuNp/GCE) for the determination of diethylstilbestrol hormone (DES) in water samples and meat, using a square wave technique voltammetry. (SWV). The electrolyte used was Britton-Robinson buffer (BR) 0.04 mol L-1 pH 10.0. Initially it was studied the electrode configuration to be used for the development work, after the optimization of solution pH, study scan speed to evaluate the charge transfer kin

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22

Arotiba, Omotayo Ademola. "Electrochemical impedance modelling of the reactivities of dendrimeric poly(propylene imine) DNA nanobiosensors." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7669_1266190932.

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<p>In this thesis, I present the electrochemical studies of three dendrimeric polypropylene imine (PPI) nanomaterials and their applications as a platform in the development of a novel label free DNA nanobiosensor based on electrochemical impedance spectroscopy. Cyclic voltammetry (CV), differentia pulse voltammetry (DPV), square wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS) techniques were used to study and model the electrochemical reactivities of the nanomaterials on glassy carbon electrode (GCE) as the working electrode.</p>

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Silva, Vinicius Carlos Costa. "Estudo eletroanalítico da dopamina utilizando eletrodo de pasta de carbono produzidos com pó de grafite recoberto por eletrodepósitos de ouro." Universidade Federal de Goiás, 2018. http://repositorio.bc.ufg.br/tede/handle/tede/8925.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-09-28T14:09:15Z No. of bitstreams: 2 Dissertação - Vinicius Carlos Costa Silva - 2018.pdf: 2032136 bytes, checksum: d25ea59456e929f9d6d4588e5f39838d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-09-28T14:18:01Z (GMT) No. of bitstreams: 2 Dissertação - Vinicius Carlos Costa Silva - 2018.pdf: 2032136 bytes, checksum: d25ea59456e929f9d6d4588e5f39838d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD

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Souza, Nyccolas Emanuel de. "Aspectos fundamentais das reações de eletro-oxidação de glicerol e álcoois similares sobre ouro." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-07052015-112646/.

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Aspectos fundamentais das reações de eletrooxidação do glicerol e álcoois similares em ouro foram estudados por meio da comparação com a eletrooxidação de álcoois similares: 1-propanol, 2-propanol, propano-1,2-diol e propano-1,3-diol, além de sorbitol e glicose. Testes eletroquímicos foram feitos em soluções ácida, neutra e alcalina. Também foram realizados testes em meio alcalino com os possíveis subprodutos de oxidação do glicerol: dihidroxiacetona, gliceraldeído, glicerato, hidroxipiruvato, mesoxalato, tartronato, oxalato e formato. Por fim, os produtos de reação foram analisados por FTIR i

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Zorica, Stojanović. "Elektrohemijsko određivanje histamina." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2011. https://www.cris.uns.ac.rs/record.jsf?recordId=76992&source=NDLTD&language=en.

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U ovom radu su razvijene elektrohemijske metode za određivanje histamina. U svimelektrohemijskim ispitivanjima kori&scaron;ćena je hronopotenciometrija. Istraživanja su obuhvatila optimizaciju uslova elektroanalitičkih tehnika i upoređivanje mehanizama generisanja analitičkog signala primenom različitih radnih elektroda, razvoj odgovarajućeg postupka pripreme uzoraka za analizu i samo određivanje histamina u hrani i piću. Ispitana je mogućnost primene čvrste zlatne elektrode, tankoslojne živine i tankoslojne niklove elektrode za elektrohemijsko određivanje histamina. U slučaju elektrooksidacij

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Untiveros, Katherine Lozano. "Electrochemical approach and development of an eletrochemical biosensor based on hairpin-DNA modified gold electrode for detection of DNA damage for a new acridine-thiophene cancer drug." Universidade Federal de Alagoas, 2017. http://www.repositorio.ufal.br/handle/riufal/2120.

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The interaction of drugs with DNA is a significant feature in pharmacology and plays a vital role in the designing of more efficient and specifically targeted drugs.The concept of hybridization of two bioactive molecules often leads to increased activity due to synergistic effects of anticancer drugs have been studied.Two important pharmacophores: Acridine and thiophene were widely studied as antitumor, antiparasitic and antibacterial agents. We hypothesize that a conjugate comprised two pharmacophores with different mechanisms of antiproliferative action can result in enhanced DNA damage. El

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Joca, Jhonny Frank Sousa. "Determinação de manganês em amostras de cimento e clínquer por voltametria de redissolução catódica empregando eletrodos de ouro." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-31082011-160037/.

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Este trabalho apresenta o desenvolvimento e a aplicação de um método alternativo para determinação de manganês em amostras de cimento e clínquer por voltametria de redissolução catódica por onda quadrada empregando eletrodos de ouro. Após estudos exploratórios acerca do comportamento eletroquímico do manganês no eletrólito suporte H3BO3 0,20 mol L-1 / KCl 0,10 mol L-1 com pH 6,5 e a otimização dos parâmetros operacionais para a voltametria de onda quadrada, foram obtidos excelentes resultados na determinação de manganês nas amostras analisadas. Destacam-se a ótima linearidade, verificada em du

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Doneux, Thomas. "Caractérisation par électrochimie et spectroscopie infrarouge in situ d'une électrode d'or (111) modifiée par du 2-mercaptobenzimidazole." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210969.

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Résumé du travail<p><p>L’étude des modifications de surfaces, et plus particulièrement des matériaux d’électrodes est un domaine en plein essor. Les modifications d’électrodes par voie organique ont des applications potentielles dans des domaines aussi variés que l’inhibition de la corrosion, l’électronique moléculaire, l’optoélectronique ou encore les biosenseurs.<p>Dans ce travail, nous nous sommes intéressés à l’électrode d’Au (111) modifiée par du 2-mercaptobenzimidazole. <p><p>Dans un premier temps, l’adsorption du MBI sur électrode d’Au (111) sous contrôle du potentiel a été examinée par

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DIAS, Ana Carolina Matos da Silva. "Desenvolvimento de plataformas sensoras para detecção eletroquímica do antígeno NS1 do vírus da dengue." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/17374.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-07-14T14:18:26Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Tese de Doutorado - Ana Carolina M.S. Dias.pdf: 7391913 bytes, checksum: 55ab68bd39f956f754684f4b795a7baa (MD5)<br>Made available in DSpace on 2016-07-14T14:18:27Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Tese de Doutorado - Ana Carolina M.S. Dias.pdf: 7391913 bytes, checksum: 55ab68bd39f956f754684f4b795a7baa (MD5) Previous issue date: 2015-

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Mossanha, Rosana. "PREPARAÇÃO, CARACTERIZAÇÃO E ESTUDOS ELETROQUÍMICOS DE ELETRODOS MODIFICADOS COM DIFERENTES MONOCAMADAS AUTOORGANIZADAS." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2011. http://tede2.uepg.br/jspui/handle/prefix/2093.

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Made available in DSpace on 2017-07-24T19:38:05Z (GMT). No. of bitstreams: 1 Rosana Mossanha.pdf: 1591695 bytes, checksum: aac2e3d256b391dd0e8f113bb72eb620 (MD5) Previous issue date: 2011-03-03<br>In this work were studied investigated different types of modifiers for the formation of self-assembled monolayers on the gold surface. The monolayers used were formed by different structural arrangements, alkyl chains and functional groups. The thiols groups used were: 3-mercaptopropionic acid (MPA), thiolactic acid (TLA), cystamine (CYS) and 11-mercaptoundecanoic acid. The electroactivity of film

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Kriegisch, Volker. "Electron transfer processes between organic redox centres and electrodes via active bridges in self-assembled monolayers." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978743814.

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Sivasubramaniam, Prabalini. "Gold based electro catalysts." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/193147/.

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Gold electrocatalysts have been of growing interest in recent years owing to their reactivity for a variety of important reactions such as the oxygen reduction reaction. This activity has been shown to be dependent on the size of the supported electrocatalyst nanoparticles. In this thesis the effects of Au nanoparticle size are explored for the oxygen reduction, ethanol oxidation and carbon monoxide oxidation reactions (Chapter four). The results show the oxygen reduction and ethanol oxidation reactions were favoured using larger particles, 6 nm in diameter, whilst the CO oxidation reaction wa

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Piatnicki, Slawomir. "Lixiviation de minerais aurifères et électrolyse directe des solutions diluées sur une cathode volumique poreuse percolée pulsée : application aux petits gisements d'or." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL040N.

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L'objectif de l'étude est l'application d'un procédé basé sur la lixiviation statique suivie de l'électrolyse directe (LSED) a la valorisation de petits gisements d'or, notamment les petits gisements amazoniens du brésil dont la production représente 75% de l'or produit dans ce pays, bien que compte tenu des techniques artisanales utilisées les taux de récupération de l'or ne dépassent pas 30 à 40% comme le montre l'état de l'art. Le procédé LSED a été appliqué à 3 minerais types différents quant aux métaux accompagnateurs et à la para genèse: il s'agit du minerai du chapeau de fer du gisement

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Saheb, Amir Hossein. "Sensing materials based on ionic liquids." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24789.

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Thesis (Ph.D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009.<br>Committee Chair: Janata, Jiri; Committee Member: Bunz, Uwe; Committee Member: Collard, David; Committee Member: Josowicz, Mira; Committee Member: Kohl, Paul.

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Kynclová, Hana. "Charakterizace nanostrukturovaných elektrod pro elektrochemické biosenzory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219511.

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Nowadays it is attached to a major effort to study applications of nanoparticles in biosensors technology. We studied the effect of gold nanoparticles on the surface of the electrodes by Electrochemical Impedance Spectroscopy method and Cyclic Voltammetry. For impedance measurements was proposed substitute electrical model and cyclic voltammetry method was used to determine the electroactive surface of electrodes.

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Gama, Elter Gouveia. "Desenvolvimento de um eletrodo de pasta de carbono modificado com eletrodepósito de ouro obtido in situ." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6941.

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Submitted by Erika Demachki (erikademachki@gmail.com) on 2017-03-14T18:52:47Z No. of bitstreams: 2 Dissertação - Elter Gouveia Gama - 2016.pdf: 9144026 bytes, checksum: d1fc24837019fb8951a0853874963512 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-03-20T12:24:25Z (GMT) No. of bitstreams: 2 Dissertação - Elter Gouveia Gama - 2016.pdf: 9144026 bytes, checksum: d1fc24837019fb8951a0853874963512 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made availa

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Cuynet, Stéphane. "Etude des conditions d’élaboration d’électrodes de pile à combustible PEMFC par procédés plasma." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2027/document.

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Émanant d’une collaboration entre le laboratoire CNRS du GREMI et le CEA le Ripault, l’objectif de cette thèse est de réaliser une étude exhaustive sur les conditions d’élaboration des électrodes de pile à combustible PEMFC par procédés plasma, dont l’enjeu est d’améliorer l’activité électro-catalytique du catalyseur employé qu’est le platine (Pt). A même quantité, la répartition du platine sur son support se révèle être un critère déterminant sur les performances délivrées par les PEMFCs. De cette observation, plusieurs axes de recherche ont été proposés et chacun d’entre eux a permis d’obten

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Paixão, Thiago Regis Longo Cesar da. "Utilização de eletrodos de Cu e Au em eletroanalítica: detecção amperométrica de etanol em ar exalado e outras aplicações." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-14062007-160003/.

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A potencialidade do eletrodo de cobre em meio alcalino foi demonstrada para o determinação de etanol a +0,6 V vs Ag/AgCl. A participação de espécies solúveis de Cu(III) no processo eletrocatalítico envolvendo a oxidação do etanol foi demonstrada por experimentos utilizando eletrodo disco-anel. A influência do potencial de pré-tratamento no sinal anódico foi investigada e correlacionada com a morfologia dos filmes formados na superfície do eletrodo por EDS (Energy Dispersive X-Ray Spectroscopy), indicando que as espécies de Cu(III) são originadas a partir da oxidação da camada de CuO. As medida

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Oliveira, TÃlio Ãtalo da Silva. "Desenvolvimento de sensores eletroquÃmicos para detecÃÃo de molinato e Ãxido nÃtrico." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10071.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>O presente trabalho ilustra o desenvolvimento de uma rota sintÃtica para a obtenÃÃo de uma meso-metaloporfirina, a partir de uma meso-porfirina base livre, macromolÃcula derivada do LÃquido da Casca da Castanha de Caju (LCC), subproduto do agronegÃcio do caju. A obtenÃÃo dessas espÃcies seguida de estudos preliminares da modificaÃÃo da superfÃcie do eletrodo de ouro com a meso-metaloporfirina de cobre com aplicaÃÃo para sensor de NO (Ãxido NÃtrico) tambÃm compÃe os objetivos desse trabalho. A partir do processo de metalaÃÃo,foi sin

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Leopold, Michael Christofi. "Interfacial Investigations of a Biological Electron Transfer Model: Cytochrome c Adsorbed on Gold Electrodes Modified with Self-Assembled Monolayers." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000713-192513.

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<p> Interfacial investigations of a protein monolayer electrochemical system, cytochrome c (cyt c) adsorbed to a carboxylic acid (COOH) terminated self-assembled monolayer (SAM) were undertaken. Previous research suggested that anomalous peak broadening observed in the voltammetry of cyt c may be the manifestation of surface effects at the SAM/solution interface (heterogeneous adsorption sites). To examine this matter further, research was directed at 1) deciphering the role of the gold substrate's topography in both SAM formation and cyt c voltammetry; 2) understanding the protein binding int

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Bandhyopadhyay, Sabyasachi. "Gold Electrode Functionalized with Amide SAM: Electron Transfer Properties and Fabrication of Bio-inspired Electrodes." Thesis, 2019. http://hdl.handle.net/10821/8216.

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Amide bonds provide primary linkage between amino acids which are basic functional groups in biology. They support complex structures of protein backbones, form scaffolds that transport ions and they mediate electron transfer as well. The entire thesis work had two major objectives. First objective was to study the electron transfer properties through self assembled monolayers (SAMs) containing alkyl and amide linkages. This has been achieved by performing conventional cyclic voltametry and chronoamperometry on alkyl and amide functionalized SAMs terminated with a redox active group like ferro

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Chen, Chen-Yin, and 陳貞吟. "Anti-fouling Nano-porous Gold Electrode Sensors." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/et5cam.

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碩士<br>國立交通大學<br>材料科學與工程學系奈米科技碩博士班<br>108<br>When developed country has become more industrialization and its citizens’ life expectancy is increasing, civil diseases like diabetes also have emerged and the related biomedical materials have gradually gained the attention of the world. The biomedical materials studied in this research can be divided into two parts. The first part is Comparison and study of increasing the surface area of gold electrode by etching and electrochemical methods.The other is the study of Nanoporous gold surface modified by anti-fouling material for Blood glucose sensin

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Lin, I.-Hsiu, and 林怡秀. "Studied on the Analytical Applications of Porous Gold Electrode." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/76719482940990660643.

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碩士<br>國立成功大學<br>化學系專班<br>94<br>There are three parts in this study : the first part is using nanoporous-Au electrodes and Osteryoung square wave voltammetry to determinate L-cysteine and glutathione in aqueous solution, individually. In the case of L-cysteine, if preconcentration time is 10 mins,the linear dynamic range is 15-160 μM, and the detection limit is 0.1 μM(3s). For the determination of glutathione, with a preconcentration time is 5 mins, and the linear dynamic range is 0.5-25 μM, and the detection limit of < 0.5μM. The second part of this study, use the GSH/nenoporous-Au electrode t

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Hsin-Chun, Ko, and 柯昕君. "Surfactant-Directed Synthesis of Gold Nanostructure on Carbon Electrode." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/22224332353159941955.

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碩士<br>國立交通大學<br>應用化學系所<br>95<br>In this study, novel nanostructures of metal gold were discovered, including sheet, flower, wire and coralloid shapes. We demonstrated the synthesis of gold nanostructures via Galvanic displacement reaction. We found that cetyltrimethylammonium chloride (CTAC) played an important role to affect the morphology of the products. Au nanosheets, nanoflowers and nanowires were derived by using Cu metal as the reductant in the presence of CTAC on carbon electrodes. The diameters of single crystal Au nanowires, reducted from HAuCl4 by Cu metal, were 15-25 nm, and the le

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Huang, Shi Jie, and 黃士杰. "Anodic Behaviors of Gold Electrode in Direct Borohydride Fuel Cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46171038312912785345.

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碩士<br>長庚大學<br>化工與材料工程學系<br>98<br>The anodic behaviors of gold electrode as anode catalyst using in direct borohydride fuel cells were investigated to collect the parameters for single cell measurements. To avoid the hydrolysis reaction of sodium borohydride in producing hydrogen and to promote the direct electrochemistry reaction of borohydride to 8 electrons transfer are the key issues of DBFC. The by-product (hydrogen) of sodium borohydride can be measured in the half-cell measurements and single cell measurements were controlled by using the parameters taken in half-cell measurements. C

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Tsai, Cheng Ta, and 蔡承達. "Glucose biosensor with gold electrode produced by electroless plating method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/94879172909137068941.

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碩士<br>國立中央大學<br>化學工程與材料工程學系<br>104<br>With the rapid development of technology, biosensors have been used extensively in medical detecting. Glucose biosensors, which have become the convenient and mature product, have great economic value because of huge consume in the world. In this study, in order to prepare lower cost gold electrode glucose biosensors, the screen printed substrate which contained palladium catalyst was prepared. The effects of contents of palladium on the performance of biosensor was investigated. A reactor for electroless plating was designed. Nickel, palladium and gold we

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Chang, Jing-shun, and 張景順. "Application of porous gold enzyme electrode in electrochemical Flow injection analysis." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/48835495278193093271.

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Fish and 洪筱瑜. "Immobilization of Oligonucleotide Probes to Gold Electrode of Voltammetric Electrochemical Sensor." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/22068578109356503929.

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Lu, Chih-Lun, and 呂志倫. "Glucose sensor based on chitosan assistant gold nanoparticles modified ITO electrode." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/27318228093081479416.

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碩士<br>國立交通大學<br>應用化學系所<br>97<br>It has been paid much attention to develop nonenzymatic glucose electrochemical sensor by inorganic metal、metal oxid or alloy nanometerial, which would eliminate the instability problem of enzymatic glucose sensor. In this study, A disposable gold nanoparticles (AuNPs) modified ITO electrode, which the effect area was fixed by photolithography and etching technique, has been developed only with single step electrodeposition for glucose sensing. The AuNPs film on the electrode was formed by dipping the ITO electrode into the mixed solution containing 400 mg/L HAu

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Wei, Fan-Ya, and 魏凡雅. "Synthesis of 1D gold nanowire electrode for the Study of Biological Sensors." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/uz7fb8.

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碩士<br>中原大學<br>奈米科技碩士學位學程<br>98<br>Gold nanowires were successfully fabricated by electrochemical deposition using polycarbonate membranes (PC) as the growing templates. The Au nanowire electrodes were modified by three methods which enhanced the response of sensibility in different ways. The nanowire electrode was employed to be the support matrix for the immobilization of hemoglobin (Hb).. Therefore, the Hb-modified Au nanowire electrode could be used as a biosensor with high sensitivity for Hb. The 3D electrode has a larger surface area than that of flat electrode and the sensitivity of elec

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