نتایج جستجو برای: electropolymerization

تعداد نتایج: 488  

2017
Paola Fanzio Chi-Tung Chang Maciej Skolimowski Simone Tanzi Luigi Sasso

We present here an electrochemical sensor microsystem for the monitoring of pH. The all-polymeric device is comprised of a cyclic olefin copolymer substrate, a 200 nm-thin patterned layer of conductive polymer (PEDOT), and a 70 nm electropolymerized layer of a pH sensitive conductive polymer (polyaniline). The patterning of the fluidic (microfluidic channels) and conductive (wiring and electrod...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2002
Saipin Thanachasai Shunsaku Rokutanzono Shoichiro Yoshida Tadashi Watanabe

Amperometric hydrogen peroxide biosensors were fabricated by incorporating horseradish peroxidase (HRP) into poly[pyrrole-co-[4-(3-pyrrolyl)butanesulfonate]] (Py-PS) copolymer films deposited on an SnO2 electrode surface by electropolymerization. The HRP/Py-PS electrodes exhibited an extended dynamic range and a markedly improved operational and storage stability, compared with HRP-incorporated...

Journal: :Talanta 2007
Maxwell C Kum Kanchan A Joshi Wilfred Chen Nosang V Myung Ashok Mulchandani

A simple method for preparing bio-functionalized soluble single-walled carbon nanotubes (SWNTs) is described. Different proteins such as bovine serum albumin (BSA), cytochrome c and horseradish peroxidase (HRP) were used to solubilize low functionality SWNTs in water aided by sonication. The unbound proteins were removed by column chromatography and the SWNT-protein conjugate was used as the so...

Journal: :Journal of visualized experiments : JoVE 2016
Travis Cantu Bradley Rodier Zachary Iszard Alissa Kilian Varun Pattani Kyle Walsh Katharina Weber James Tunnell Tania Betancourt Jennifer Irvin

A method for the synthesis of electroactive polymers is demonstrated, starting with the synthesis of extended conjugation monomers using a three-step process that finishes with Negishi coupling. Negishi coupling is a cross-coupling process in which a chemical precursor is first lithiated, followed by transmetallation with ZnCl2. The resultant organozinc compound can be coupled to a dibrominated...

2011
Fatma Arslan Selvin Ustabas Halit Arslan

In this study, a novel amperometric glucose biosensor with immobilization of glucose oxidase on electrochemically polymerized polyaniline-polyvinylsulphonate (Pani-Pvs) films has been accomplished via the entrapment technique. Electropolymerization of aniline on the Pt surface of the Pt electrode was carried out at constant potential (0.75 V, vs. Ag/AgCl) using an electrochemical cell containin...

2010
C. O. SANCHEZ A. ISLA C. BUSTOS F. DÍAZ N. GATICA

The entrapment method was used to prepare electrochemical biosensors. Using controlled potential method, copolymers were synthesized between aniline y sulfonated-anilines in aqueous media at pH 4.9 on Platinum disc. The copolymers were characterized by elemental analysis and spectroscopy. Glucose-oxidase was entrapped in the electropolymerization process, at pH 4.9 in aqueous media. The copolym...

2012
Ramona Gerwig Kai Fuchsberger Birgit Schroeppel Gordon Steve Link Gerhard Heusel Udo Kraushaar Wolfgang Schuhmann Alfred Stett Martin Stelzle

Composites of carbon nanotubes and poly(3,4-ethylenedioxythiophene, PEDOT) and layers of PEDOT are deposited onto microelectrodes by electropolymerization of ethylenedioxythiophene in the presence of a suspension of carbon nanotubes and polystyrene sulfonate. Analysis by FIB and SEM demonstrates that CNT-PEDOT composites exhibit a porous morphology whereas PEDOT layers are more compact. Accordi...

2012
J. Wang H. X. Zhao L. P. Du H. Cai P. Wang

An enzyme-metal-insulator-silicon (EMIS) structured chemical sensor based on photovoltage technology is constructed for potentiometric biosensing of glucose in a flow-injection analysis (FIA) system. To enhance the sensibility of the sensor to glucose, an ultra-thin (60 nm) film of polypyrrole (PPy)-glucose oxidase (GOD) is formed as the glucose-sensitive membrane through a simple electropolyme...

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