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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 Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): August 01, 2017
Effective date (End): February 28, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Lauro Tatsuo Kubota
Grantee:Waldemir José Paschoalino Junior
Host 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.

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Scientific publications (8)
(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)
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, . (17/05213-3, 16/08166-3, 16/14507-8, 13/22127-2, 14/50867-3)
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, p. 4508-4525, . (17/05213-3, 14/50867-3, 13/22127-2)
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, . (14/50867-3, 16/14507-8, 17/05213-3, 13/22127-2)
DA SILVA, ALEXSANDRA D.; PASCHOALINO, WALDEMIR J.; KUBOTA, LAURO T.. A Simple, sensitive, and selective electrochemical aptasensor for cortisol based on rGO-AuNPs. Electroanalysis, v. N/A, p. 12-pg., . (14/50867-3, 13/22127-2, 17/05213-3)
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, . (14/50867-3, 18/12910-5, 17/05213-3, 13/22127-2)
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, . (16/14507-8, 14/50867-3, 13/22127-2, 17/05213-3)
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, . (17/05213-3, 13/22127-2, 14/50867-3, 16/14507-8)
PASCHOALINO, WALDEMIR J.; KOGIKOSKI, SERGIO, JR.; 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, p. 21-pg., . (14/50867-3, 17/05213-3, 16/14507-8, 16/08166-3, 13/22127-2)

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