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In-operando Study of Nanoscale Proprieties of Molecular Switching Devices

Grant number: 19/06568-5
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2019
Effective date (End): May 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Paulo Roberto Bueno
Grantee:Martin Schwellberger Barbosa
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated research grant:17/24839-0 - Nanoelectronics and nanoscale electrochemistry: fundaments and applications, AP.TEM

Abstract

Electrochemical sensors that work with molecular switching mechanisms arepromising for the detection of pollutants and diseases. Molecular switching revolvesnanoscale charge transfer phenomena and mesoscopic scale transports and,therefore, provides a more complete understanding of these systems; this can beachieved by studying individual processes and allows integrating them to a suitablephysical model. In this work we propose the study of molecular switching devicesthrough the following steps: fabrication of redox active electrodes modified withpeptide monolayers; attachment of redox active sites and gold nanoparticles to theelectrodes via molecular links; in-depth investigation of structural and electrochemicalcharacteristics with and in-operando characterization of the nanoscale phenomenawith scanning probe techniques in an electrochemical environment. We believe thatthe combination of the electrochemical and in-operando results will lead to the fullunderstanding and, therefore, optimization of devices for practical applications.