نتایج جستجو برای: gold electrode

تعداد نتایج: 144548  

This paper proposes a Micro-electro-mechanical (MEMS) capacitive pressure sensor that relies on the movable electrode displaced like a flat plate equal to the maximum center deflection of diaphragm. The diaphragm, movable electrode and mechanical coupling are made of polysilicon, gold and Si3N4, respectively. The fixed electrode is gold and the substrate is Pyrex glass. This proposed method inc...

Journal: :iranian journal of pharmaceutical research 0
aa behfar n sadeghi b jannat r oveisi

voltammetric techniques have been considered as important methods among the analytical techniques used for the identification and determination of trace concentrations of many biological molecules such as l-ascorbic acid (aa). l-ascorbic acid is an electro-active molecule, though it is difficult to determine its value directly with a majority of electrodes made of carbon and transition metals, ...

Journal: :physical chemistry and electrochemistry 0

a new schiff base 2-aminothiophenol furfural self assembled monolayer (sam) has been fabricated on a bare gold electrode as a novel sensor for determination of dopamine. electrochemical impedance spectroscopywas utilized to investigate the properties of the au 2-aminothiophenol furfural self assembled monolayermodified electrode (au atf sam-me) using the [fe(cn)6]3-/4- redox couple. the electro...

Ali Akbar Moghadamnia Atieh Zabihollahpoor, Ghasem Najafpour-Darzi Mostafa Rahimnejad,

Herein, gold nanoparticle had been successfully synthesized through a simple, inexpensive and clean electrochemical technique. Gold nanoparticles were directly deposited on the electrode surface using an electrochemical strategy. Then, the electrochemical deposition parameters (such as applied potential and deposition time) were optimized. 1.1 V and 250 s were applied as the optimal electrodepo...

Journal: :iranian journal of science and technology (sciences) 2009
m. saber tehrani

fabrication of a cysteamine (ca) self-assembled monolayer (sam) modified gold electrode insitufunctionalized with l-lysine (lys) is presented and described. the fabricated electrode was used forhighly selective and sensitive accumulation and the determination of copper ions (cu2+) in a nanomolarconcentration. techniques like cyclic voltammetry (cv) and electrochemical impedance spectroscopy (ei...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Liping Lu Xiangqin Lin

A novel biochemical sensor was assembled on a glass carbon electrode by a electrodeposition process. Gold nanoparticles were deposited by potential +1.5 V on the glass carbon electrode. CT-DNA was deposited by potential +1.5 V on the gold nanoparticles array electrode. The properties of the modified electrode were characterized by electrochemical impedance spectroscopy (EIS), X-ray photoelectro...

Journal: :Journal of cardiovascular electrophysiology 2005
Thorsten Lewalter Alexander Bitzen Sabine Wurtz Robert Blum Karsten Schlodder Alexander Yang Lars Lickfett Jörg O Schwab Jan W Schrickel Klaus Tiemann Markus Linhart Endre Zima Bela Merkely Berndt Lüderitz

Gold-tip electrodes. Radiofrequency (RF) catheter ablation is widely used to induce focal myocardial necrosis using the effect of resistive heating through high-frequency current delivery. It is current standard to limit the target tissue-electrode interface temperature to a maximum of 60-70 degrees C to avoid char formation. Gold (Au) exhibits a thermal conductivity of nearly four times greate...

Journal: :Journal of the American Chemical Society 2013
Felice C Simeone Hyo Jae Yoon Martin M Thuo Jabulani R Barber Barbara Smith George M Whitesides

Analysis of rates of tunneling across self-assembled monolayers (SAMs) of n-alkanethiolates SCn (with n = number of carbon atoms) incorporated in junctions having structure Ag(TS)-SAM//Ga2O3/EGaIn leads to a value for the injection tunnel current density J0 (i.e., the current flowing through an ideal junction with n = 0) of 10(3.6±0.3) A·cm(-2) (V = +0.5 V). This estimation of J0 does not invol...

2009
M. M. Rahman K. J. Oh I. C. Jeon

The 7-ferrocenycarbonyloxy-1-heptanethiol (FcCO2C7SH) is synthesized using ferrocene carboxylic acid, 1,6-fibromohexane, and NaS, which is confirmed and separated by FT-IR, H NMR, and column chromatography. The basic redox (interfacial) properties are also studied of the self-assembled monolayers (SAMs) formed with this synthesized compound on polycrystalline gold electrode by Electrochemical Q...

2005
Karolien De Wael Annemie Adriaens Eduard Temmerman

This paper describes the fabrication and surface modification of gold microelectrode array structures. The modification is done by continuous cycling of the electrode array in a pH 12 buffer solution containing 8.01 mmol L−1 5,10,15,20-tetrakis-(4-sulphonatophenyl)porphyrin tetrasodium salt (H2TSPor). Incorporation of gold ions in the ligand during the potential cycling of the gold electrode is...

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