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Fabrication of nanometric probes for the study of biochemical processes by using Scanning Electrochemical Microscopy

Abstract

This research project aims at the development of electrodes with structurally microscopic dimensions, i.e. both the active area of the electrode (conductive fiber) as the insulation coating have dimensions in the micro or nanometer scale. These tips will be employed as sensors coupled to an electrochemical microscope equipment to get high resolution information on the transport of chemical species into cells, tissues and synthetic and biological membranes. The experimental data will be fitted in accordance with existing theories for the diffusion of chemical species in solution, pores and membranes. The technique will be used in the monitoring of mitochondrial oxygen consumption, quantification of reactive oxygen/nitrogen and tioredoxins in macrophages subjected to inflammatory stimuli and studies on the transport of glutathione through cellular membranes. The ultimate goal is to create enough and suitable infrastructure conditions for the full establishment of a reference laboratory in Brazil to carry out experiments with Scanning Electrochemical Microscopy (SECM). (AU)

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Scientific publications (14)
(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)
ALAN R. F. LIMA; ALEX S. LIMA; GABRIEL N. MELONI; CARLA S. SANTOS; MAURO BERTOTTI. Perovskite-Type Oxides La0.6M0.4Ni0.6Cu0.4O3 (M = Ag, Ba, Ce) towards the Oxygen Reduction Reaction (ORR) in Alkaline Medium: Structural Aspects and Electrocatalytic Activity. Journal of the Brazilian Chemical Society, v. 32, n. 3, p. 665-674, . (14/22396-6, 15/02095-4, 15/20776-9)
BARROSO, IGNACIO G.; SANTOS, CARLA S.; BERTOTTI, MAURO; FERREIRA, CLELIA; TERRA, WALTER R.. Molecular mechanisms associated with acidification and alkalization along the larval midgut of Musca domestica. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY, v. 237, . (15/20776-9, 17/08103-4)
ORELLANA JARAMILLO, DARIO XAVIER; SUKERI, ANANDHAKUMAR; SARAVIA, LUCAS P. H.; ESPINOZA-MONTERO, PATRICIO JAVIER; BERTOTTI, MAURO. Nanoporous Gold Microelectrode: A Novel Sensing Platform for Highly Sensitive and Selective Determination of Arsenic (III) using Anodic Stripping Voltammetry. Electroanalysis, v. 29, n. 10, p. 2316-2322, . (14/15215-5, 15/20776-9)
KUMAR, ABHISHEK; GONCALVES, JOSUE M.; SUKERI, ANANDHAKUMAR; ARAKI, KOITI; BERTOTTI, MAURO. Correlating surface growth of nanoporous gold with electrodeposition parameters to optimize amperometric sensing of nitrite. SENSORS AND ACTUATORS B-CHEMICAL, v. 263, p. 237-247, . (14/15215-5, 15/20776-9, 16/07461-1)
GONCALVES, JOSUE M.; MATIAS, TIAGO A.; SARAVIA, LUCAS P. H.; NAKAMURA, MARCELO; BERNARDES, JULIANA S.; BERTOTTI, MAURO; ARAKI, KOITI. Synergic effects enhance the catalytic properties of alpha-Ni(OH)(2)-FeOCPc@rGO composite for oxygen evolution reaction. Electrochimica Acta, v. 267, p. 161-169, . (15/20776-9)
LIMA, ALAN R. F.; LIMA, ALEX S.; MELONI, GABRIEL N.; SANTOS, CARLA S.; BERTOTTI, MAURO. Perovskite-Type Oxides La0.6M0.4Ni0.6Cu0.4O3 (M = Ag, Ba, Ce) towards the Oxygen Reduction Reaction (ORR) in Alkaline Medium: Structural Aspects and Electrocatalytic Activity. Journal of the Brazilian Chemical Society, v. 32, n. 3, p. 10-pg., . (15/20776-9, 15/02095-4, 14/22396-6)
CRITELLI, RENAN A. J.; SUMODJO, PAULO T. A.; BERTOTTI, MAURO; TORRESI, ROBERTO M.. Influence of glycine on Co electrodeposition: IR spectroscopy and near-surface pH investigations. Electrochimica Acta, v. 260, p. 762-771, . (15/20776-9, 15/26308-7)
SANTOS, CARLA SANTANA; BANNITZ-FERNANDES, RENATA; LIMA, ALEX S.; TAIRUM, CARLOS A.; MALAVAZI, IRAN; NETTO, LUIS E. S.; BERTOTTI, MAURO. Monitoring H2O2 inside Aspergillus fumigatus with an Integrated Microelectrode: The Role of Peroxiredoxin Protein Prx1. Analytical Chemistry, v. 90, n. 4, p. 2587-2593, . (13/14955-2, 15/02095-4, 15/20776-9, 14/22396-6)
CRITELLI, RENAN A. J.; BERTOTTI, MAURO; TORRESI, ROBERTO M.. Probe effects on concentration profiles in the diffusion layer: Computational modeling and near-surface pH measurements using microelectrodes. Electrochimica Acta, v. 292, p. 511-521, . (15/26308-7, 15/20776-9)
SUKERI, ANANDHAKUMAR; BERTOTTI, MAURO. Nanoporous Gold Surface: An Efficient Platform for Hydrogen Evolution Reaction at Very Low Overpotential. Journal of the Brazilian Chemical Society, v. 29, n. 2, p. 226-231, . (14/15215-5, 15/20776-9)
CATOTA SAENZ, HENRY STEVEN; PATRICIO HERNANDEZ-SARAVIA, LUCAS; SELVA, JESSICA S. G.; SUKERI, ANANDHAKUMAR; JAVIER ESPINOZA-MONTERO, PATRICIO; BERTOTTI, MAURO. Electrochemical dopamine sensor using a nanoporous gold microelectrode: a proof-of-concept study for the detection of dopamine release by scanning electrochemical microscopy. Microchimica Acta, v. 185, n. 8, . (14/15215-5, 15/20776-9)
SUKERI, ANANDHAKUMAR; BERTOTTI, MAURO. Electrodeposited honeycomb-like dendritic porous gold surface: An efficient platform for enzyme-free hydrogen peroxide sensor at low overpotential. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, v. 805, p. 18-23, . (14/15215-5, 15/20776-9)

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