DEVELOPMENT OF A MODIFIED ELECTRODE WITH SAMs AND THEIR USE AS BIOSENSOR

• Grant number: 12/21703-7
• Support Opportunities: Scholarships in Brazil - Master
• Effective date (Start): March 01, 2013
• Effective date (End): March 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Marcos Fernando de Souza Teixeira
• Grantee: Thaisa Aparecida Baldo
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

The main purpose of this master's project is to characterize chemically modified electrodes (CMEs) by the formation of self-assembled monolayers (SAMs) with alkanethiols on the surface of the gold electrode. Check your behavior of electron transfer with solution K3[Fe(CN)6] and apply this electrode as biosensor. The self-assembled monolayers have been commonly used due to its homogeneous behavior, increasing the sensitivity and reproducibility of the electrode, also alter the reactivity and selectivity of the sensor base, making it possible to develop electrodes for various purposes and applications. In this project the SAMs will be formed from alkanethiol bromide 11 - mercaptoundecyl-N',N'',N'''-trimethylammonium and other alkanethiols with smaller carbon chains, checking the difference in behavior between these two compounds, and also focusing in the electronic transfer to the course of the carbon chains. For the characterization of SAMs will be used electrochemical techniques (cyclic voltammetry, chronoamperometry, chronocoulometry), infrared spectroscopy (FTIR), photoelectron spectroscopy, X-ray (XPS), atomic force microscopy (AFM) and scanning electron microscopy (SEM). After defining the parameters of composition and electrochemical characteristics of the CME in different ways, it is intended to perform tests to evaluate the electrocatalytic activity as biosensors for glucose, lactose and hydrogen peroxide.

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)

BALDO, THAISA A.; DAVID-PARRA, DIEGO N.; GOMES, HOMERO M.; SERAPHIM, PATRICIA M.; TEIXEIRA, MARCOS F. S.. Study of binary self-assembled monolayers of a novel anchoring thiol (11-mercaptoundecyl-N ',N '',N '''-trimethylammonium) in the electron transfer with glucose oxidase enzyme. SENSING AND BIO-SENSING RESEARCH, v. 18, p. 8-pg., 2018-04-01. (12/21703-7)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

BALDO, Thaisa Aparecida. Desenvolvimento de um eletrodo modificado com monocamadas auto-organizadas e sua utilização como biossesor. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Biociências Letras e Ciências Exatas. São José do Rio Preto São José do Rio Preto.