Nonocomposites films of conducting polymers, clay nanoparticles and gold nanoparticles for environmental sensor aplication

• Grant number: 11/00733-2
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): May 01, 2011
• Effective date (End): April 30, 2015
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Principal Investigator: Marystela Ferreira
• Grantee: Anerise de Barros
• Home Institution: Centro de Ciências e Tecnologias para a Sustentabilidade (CCTS). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil

Abstract

The aim of the project is the fabrication and characterization of nanostructured films of nanocomposites obtained by the Langmuir-Blodgett (LB) and self-assembly layer-by-layer (LbL) techniques, envisaging sensor application for environmental monitoring. Ultrathin films of conducting polymers functionalized with nanoclays and gold nanoparticles will be studied to optimize the molecular architectures that will compose the sensing units of the sensor. Additionally, the thickness control offered by the LB and LbL techniques can be explored to achieve low response times in the device. The nanocomposites will be made preferentially by polyaniline (PAni), montmorilonite clay and gold nanoparticles. The characterization of the Langmuir monolayers by surface pressure and surface potential will be essential to better define the LB film fabrication, which will further deposited onto solid substrates, and for the LbL films will be chosen the molecular architecture that allows heavy metals and phenolic compounds detection. LB and LbL films of conducting polymers, nanoclays and gold nanoparticles, as well their interaction with analytes, will be studied and characterized throughout UV-vis, FTIR and spectroscopy, atomic force microscopy (AFM) and scanning electron microscopy (SEM). The best ultrathin films obtained will be immersed in different liquid systems, and used as work electrode in cyclic voltammetry and Square Wave Anodic Stripping voltammetry. (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)

DE BARROS, ANERISE; LEOPOLDO CONSTANTINO, CARLOS JOSE; DA CRUZ, NILSON CRISTINO; RIBEIRO BORTOLETO, JOSE ROBERTO; FERREIRA, MARYSTELA. High performance of electrochemical sensors based on LbL films of gold nanoparticles, polyaniline and sodium montmorillonite clay mineral for simultaneous detection of metal ions. Electrochimica Acta, v. 235, p. 700-708, MAY 1 2017. Web of Science Citations: 10.

DE BARROS, A.; CONSTANTINO, C. J. L.; BORTOLETO, J. R. R.; DA CRUZ, N. C.; FERREIRA, M. Incorporation of gold nanoparticles into Langmuir-Blodgett films of polyaniline and montmorillonite for enhanced detection of metallic ions. SENSORS AND ACTUATORS B-CHEMICAL, v. 236, p. 408-417, NOV 29 2016. Web of Science Citations: 9.

DE BARROS, ANERISE; FERREIRA, MARISELMA; LEOPOLDO CONSTANTINO, CARLOS JOSE; RIBEIRO BORTOLETO, JOSE ROBERTO; FERREIRA, MARYSTELA. Synergy between Polyaniline and OMt Clay Mineral in Langmuir-Blodgett Films for the Simultaneous Detection of Traces of Metal Ions. ACS APPLIED MATERIALS & INTERFACES, v. 7, n. 12, p. 6828-6834, APR 1 2015. Web of Science Citations: 16.