Investigation of the electrocatalytic activity of sensors based on graphene oxide decorated with Pt, Au or Ag nanoparticles by scanning electrochemical microscopy.

• Grant number: 17/05213-3
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): August 01, 2017
• Effective date (End): July 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal researcher: Lauro Tatsuo Kubota
• Grantee: Waldemir José Paschoalino Junior
• Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 13/22127-2 - Development of novel materials strategic for integrated analytical devices, AP.TEM
• Associated scholarship(s): 18/12910-5 - Investigation of the electrocatalytic activity of sensors based on graphene oxide decorated with PT, AU or Ag nanoparticles by scanning electrochemical microscopy, BE.EP.PD

Abstract

Aiming at a range of applications since selective catalysts to biosensors, understanding the processes that take place on surface/interface of an electrocatalyst and determining its electrocatalytic activity at different regions are very important. Scanning Electrochemical Microscopy (SECM) provides direct images of heterogeneous systems and also yields a local modification of substrates due to electrochemical reactions. So the goal of this project is the investigation of the electrocatalytic activity of sensors based on graphene oxide modified with Pt, Au or Ag nanoparticles by SECM. The main point is to scan the surface/interface of the sensors focusing on the understanding of their catalytic properties leading to the improvement of substances detection. Furthermore, this project looks for the correlation between the preparation method of graphene oxides decorated with noble metals and the electrocatalytic activity of the sensors. This correlation could provide the knowledge to improve the analytic performance of the sensors.

Scientific publications

(6)

(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)

PESSANHA, TATIANA M.; PASCHOALINO, WALDEMIR J.; DEROCO, PATRICIA B.; KOGIKOSKI, SERGIO; DE MORAES, ANA C. M.; CASTRO SILVA, CECILIA CARVALHO; KUBOTA, LAURO T. Interfacial Capacitance of Graphene Oxide Films Electrodes: Fundamental Studies on Electrolytes Interface Aiming (Bio)Sensing Applications. Electroanalysis, JUL 2021. Web of Science Citations: 0.

DA SILVA, ALEXSANDRA D.; PASCHOALINO, WALDEMIR J.; DAMASCENO, JOAO PAULO V.; KUBOTA, LAURO T. Structure, Properties, and Electrochemical Sensing Applications of Graphene-Based Materials. CHEMELECTROCHEM, v. 7, n. 22 OCT 2020. Web of Science Citations: 0.

PASCHOALINO, WALDEMIR J.; PAYNE, NICHOLAS A.; PESSANHA, TATIANA M.; GATEMAN, SAMANTHA M.; KUBOTA, LAURO T.; MAUZEROLL, JANINE. Charge Storage in Graphene Oxide: Impact of the Cation on Ion Permeability and Interfacial Capacitance. Analytical Chemistry, v. 92, n. 15, p. 10300-10307, AUG 4 2020. Web of Science Citations: 0.

KOGIKOSKI, JR., SERGIO; PASCHOALINO, WALDEMIR J.; CANTELLI, LORY; SILVA, WILGNER; KUBOTA, LAURO T. Electrochemical sensing based on DNA nanotechnology. TRAC-TRENDS IN ANALYTICAL CHEMISTRY, v. 118, p. 597-605, SEP 2019. Web of Science Citations: 0.

PASCHOALINO, WALDEMIR J.; KOGIKOSKI, JR., SERGIO; BARRAGAN, JOSE T. C.; GIAROLA, JULIANA F.; CANTELLI, LORY; RABELO, THAIS M.; PESSANHA, TATIANA M.; KUBOTA, LAURO T. Emerging Considerations for the Future Development of Electrochemical Paper-Based Analytical Devices. CHEMELECTROCHEM, v. 6, n. 1, SI, p. 10-30, JAN 2 2019. Web of Science Citations: 9.

KOGIKOSKI, JR., SERGIO; PASCHOALINO, WALDEMIR J.; KUBOTA, LAURO T. Supramolecular DNA origami nanostructures for use in bioanalytical applications. TRAC-TRENDS IN ANALYTICAL CHEMISTRY, v. 108, p. 88-97, NOV 2018. Web of Science Citations: 6.