Development of electrodes based on composites made of carbon nanotubes, conducting polymers and gold nanoparticles

• Grant number: 10/16031-4
• Support type: Regular Research Grants
• Duration: February 01, 2011 - July 31, 2013
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Principal researcher: Fabio Ruiz Simões
• Grantee: Fabio Ruiz Simões
• Home Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil

Abstract

Materials based on Conducting Polymers (CPs) and Carbon Nanotubes (CNTs) have been increasingly used in nanotechnology applications. Aiming applications such as sensors and electrocatalysts materials, the CNTs have the ability to promote the electron transfer reactions, increase the reaction rate and reduce oxidation potential. In turn, the main characteristic of CPs is their electrical conductivity that can be regulated in a wide range, through interactions with recipients and donors of electrons, which makes them attractive as transducers or active materials. Additionally, composites of CNTs with CPs exhibit synergetic properties such as the decrease of the electrical resistance and the increase of the specific capacitance. Modified with nanoparticles, these materials have also been used in applications such as the electrocatalytic oxidation of small organic molecules and electrochemical sensors.The main objective of this project is to develop at the Federal University of São Paulo, Campus Diadema, electrode materials based on carbon nanotubes and polyaniline composites modified with gold nanoparticles. The composites will be produced with different mass compositions by chemical synthesis and electrochemistry. Films of these materials will be deposited at solid electrodes such as ITO, platinum and glassy carbon using methods of prepare such as evaporation (casting), electrochemical synthesis and layer-by-layer (LBL). The composites will be characterized using various techniques such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Ultraviolet-Visible and Infrared spectrophotometry (UV-visible and IR) and scanning electron microscopy (SEM). (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ROSA, TIAGO; AROEIRA, GUSTAVO J. R.; PARREIRA, LUANNA S.; CODOGNOTO, LUCIA; SANTOS, MAURO C.; SIMOES, FABIO R. Self-assembled films based on polyaniline/multiwalled carbon nanotubes composites and sulphonated polystyrene deposited onto ITO substrates. Synthetic Metals, v. 210, n. B, p. 186-191, DEC 2015. Web of Science Citations: 5.

PALAZZO, FERNANDA; CODOGNOTO, LUCIA; SIMOES, FABIO RUIZ. Electrodes Based on Functionalized Carbon Nanotubes as Sensors to Determine Fenitrothion in Apple Tea Samples. Sensor Letters, v. 11, n. 12, p. 2310-2314, DEC 2013. Web of Science Citations: 6.