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...

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, ...

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...

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...

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...

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...

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...

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...

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...

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...