Electrochemical sensor based on graphene oxide reduced and functionalized with gold nanoparticles for the detection of methyl parathion

• Grant number: 17/03523-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2017
• End date: October 31, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Marystela Ferreira
• Grantee: Gustavo Henrique Sousa Rodrigues
• Host Institution: Centro de Ciências e Tecnologias para a Sustentabilidade (CCTS). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil

Abstract

In this project, we proposed to develop Layer by Layer films to detect pesticide. For this purpose, LbL films of different architectures composed of reduced graphene oxide functionalized with poly (diallyl dimethyl ammonium chloride) (PDDA), forming the reduced graphene and oxide functionalized with poly (4-styrene sulfonic acid) (PSS), forming the GPSS, and gold nanoparticle (AuNP) will be deposited onto glass substrate containing ITO layer to form the sensory unit. The best manufacturing conditions of nanostructured films (architecture, number of bilayers, analyte concentration, temperature) will be investigated in order to obtain the best sensor. Firstly, the characterization of synthesized nanomaterials and nanostructured films will be carried out by Fourier Transform Infrared Spectroscopy (FTIR) and Atomic Force Microscopy (AFM) spectroscopic techniques. Then, the performance of the sensors formed by different films will be evaluated in the detection of Methyl Parathion in terms of limit of detection, sensitivity and interferences through the electrochemical techniques of cyclic voltammetry and differential pulse. The best sensor will be applied for the detection of methyl parathion in environmental samples. (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)

RODRIGUES, GUSTAVO H. S.; MIYAZAKI, CELINA M.; RUBIRA, RAFAEL J. G.; CONSTANTINO, CARLOS J. L.; FERREIRA, MARYSTELA. Layer-by-Layer Films of Graphene Nanoplatelets and Gold Nanoparticles for Methyl Parathion Sensing. ACS APPLIED NANO MATERIALS, v. 2, n. 2, p. 1082-1091, FEB 2019. (14/15093-7, 16/09634-0, 16/19387-0, 17/03523-5)