Electrical Characterization and Hydrogen Peroxide Sensing Properties of Gold/Nafion:Polypyrrole/MWCNTs Electrochemical Devices

Abstract

Electrochemical devices using as substrates copier grade transparency sheets are developed by using ion conducting Nafion: polypyrrole mixtures, deposited between gold bottom electrodes and upper electrodes based on Multi Walled Carbon Nanotubes (MWCNTs). The electrical properties of the Nafion:polypyrrole blends and of the gold/Nafion:polypyrrole/MWCNTs devices are investigated under dry conditions and in deionized water by means of frequency dependent impedance measurements and time domain electrical characterization. According to current-voltage measurements carried out in deionized water, the steady state current forms cycles characterized by redox peaks, the intensity and position of which reversibly change in response to H2O2, with a lower detection limit in the micromolar range. The sensitivity that is obtained is comparable with that of other electrochemical sensors that however, unlike our devices, require supporting electrolytes.

Electrochemically Prepared Three‐dimensional Porous Nitrogen‐doped Graphene Modified Electrode for Non‐enzymatic Detection of Hydrogen Peroxide

“…Hydrogen peroxide (H 2 O 2 ), as a common liquid oxidant and an important reactive oxygen species, is widely involved in the fields of food, chemistry, biology, pharmaceutical, clinical and environmental analyses , . However, high concentration of H 2 O 2 (≥ 50 μM) is cytotoxic to biological cells . H 2 O 2 is also concerned to some central nervous system diseases .…”

3D Manufacture of Gold Nanocomposite Channels Facilitates Neural Differentiation and Regeneration

“…The potential functions of gold in nerve tissue engineering have not been realized until recently. The relatively excellent mechanical properties and biological suitability make gold an ideal candidate for nerve guidance channels . PCL is a sort of biodegradable, nonimmunogenic, and nontoxic thin material.…”

Development of electrochemical sensor based on layered double hydroxide as a marker of environmental toxin

“…Thus there is an urgent need to maintain a continuous check on health damaging pollutants in water and the environment. Therefore the discovery and detoxification of hazardous chemicals are essential for the safety of living organisms, as well as required for industrial purposes [4][5][6].…”

“…Thus there is an urgent need to maintain a continuous check on health damaging pollutants in water and the environment. Therefore the discovery and detoxification of hazardous chemicals are essential for the safety of living organisms, as well as required for industrial purposes [4][5][6].Different tools and methods have been applied to search for toxic organic pollutants, but none of these has been fully satisfactory on the basis of its performance and high cost [7][8][9][10][11][12]. Nowadays sensor technology has a major role in keeping the environment and water safe and usable for living organisms.…”