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Spatial-temporal resolution of surface metallic oxides on electrochemical oscillators

Grant number: 17/05592-4
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2017
Effective date (End): July 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Raphael Nagao de Sousa
Grantee:Maria Rodrigues Pinto
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:16/01817-9 - Design and control of self-organized electrochemical patterns, AP.JP


The formation of surface metal oxides is a process frequently observed in several electrochemical oscillators. In general, the oxygenated species participate in the feedback loops, being a major contributor for the birth of oscillatory behavior. The combination of the electrocatalysis of oxide formation and the spatiotemporal resolution of the self-organized structure in the solid-liquid interface can provide important information in the development of methodologies to control the dynamics of the system. This project aims to establish this correlation between the reaction mechanism and the formation of self-organized patterns by the implementation of the ellipsometry technique in the extraction of surface images of the spatially distributed oxides. The technique will be coupled to the electrochemical cell in order to obtain in situ measurements and compared with the electric variables as potential and current. Emphasis will be given in the study of the alternating electrodeposition process of nanostructured copper multilayers in oscillatory regime.

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)
KITAGAKI, BIANCA T.; PINTO, MARIA R.; QUEIROZ, ADRIANA C.; BREITKREITZ, MARCIA C.; ROSSI, FEDERICO; NAGAO, RAPHAEL. Multivariate statistical analysis of chemical and electrochemical oscillators for an accurate frequency selection. Physical Chemistry Chemical Physics, v. 21, n. 30, p. 16423-16434, AUG 14 2019. Web of Science Citations: 0.
ROSPENDOWISKI, JULIA; PINTO, MARIA R.; HESSEL, CRISTIAN; SITTA, ELTON; NAGAO, RAPHAEL. Tuning Electrochemical Bistability by Surface Area Blocking in the Cathodic Deposition of Copper. ACS OMEGA, v. 3, n. 10, p. 13636-13646, OCT 2018. Web of Science Citations: 1.

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