Profesores

Calvo, Ernesto Julio
Full Professor UBA

CONICET: Principal Investigator INQUIMAE Inorganic, Analytical and Physical Chemistry Department Tel.: 54-11- 4576-3378/80 ext. 120 Fax: 54-11- 4576-3341 -Ms. in Chemistry Univ. of Buenos Aires, 1975. -PhD of Chemistry Univ. of La Plata, 1979. Posdoc. Imperial College of Science and Technology (Chemistry and Materials Science), UK,1979-1982. -Senior Research Associate: CWRU, Chemistry Department and Center for Electro-chemistry, USA, 1983-84. -Visiting Scientist,Max-Planck Institut, Germany,1987 and 1992. Awards: Guggenheim Fellow 2000 ¨e-mail: calvo@qi.fcen.uba.ar ¨web: http://www.qi.fcen.uba.ar/personales/calvo ¨ Field of Interest: Enzyme electrodes, self-assembled layer-by-layer molecular supramolecular layers, fuel cells, oxygen reduction and electrocatalysis. ¨Techniques: Cyclic voltammetry, chronoamperometry and EIS, SCEM,EQCM with electro-acoustic impedance, ultraicroelectrodes, rotating disc and ring-disc electrodes. AFM and STM, FTIR.

Molecular Electrochemistry, Bioelectrochemistry and Nanotechnology

We study modified electrodes with biomolecules for molecular recognition and electrical signal generation in biosensors (enzyme, immuno and genomic). The build up of thin layers comprised of enzymes and redox polyelectrolytes by electrostatic adsorption self-assembly of supramolecular structures leads to molecular recognition surfaces, where the bio-molecules are "wired" to the electrode.

We develop molecular transistors and nanotransistors of polyaniline modified by self-assembled recognition layers and integrated in hybrid circuits.

Funding:

Conicet, ANPCyT, Fundación Antorchas, Motorola Semiconductor Product Sector, British Council, Volkswagen Stiftung.

Selected Publications:

"Layer-by-layer electrostatic deposition of biomolecules on surfaces for molecular recognition, redox mediation and signal generation". E.J. Calvo, F. Battaglini, C. Danilowicz, A. Wolosiuk, M. Otero. Faraday Discussion 116; 47-65; 2000.

"Viscoelastic changes in Os-containing poly(allylamine) based redox hydrogels for ampero-metric enzyme electrodes: An EQCM study". E.J. Calvo, R. Etchenique. J. Phys. Chem. 105; 8944-50; 1999.

"Electrostatic Interactions at Self-Assembled Molecular Films of charged thiols" on gold. V. Molinero, E.J. Calvo. J. Electroanal. Chem., 445; 17-25; 1998.

"Quartz crystal impedance studies at 10MHz of viscoelastic liquids and films". E.J. Calvo, R. Etchenique, P.N. Bartlett, K. Singhal, C. Santamaría. Faraday Discussion 10; 141-157; 1997.

"Redox Mediation in a layer-by-layer self assembled poly(allylamine)-ferrocene and Glucose Oxidase". J. Hodak, R. Etchenique, E.J. Calvo, K. Singhal, P.N. Bartlett. Langmuir 13, 2716; 1997.