marzo 3, 2020

Prof. Dr. Gabriela I. Lacconi (English Version)

(INFIQC-CONICET, Dpto. Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba.)

Topic: Design of 2D hybrid materials with plasmonic and electrocatalytic activity.

Results on the design, synthesis, characterization and applications of different hybrid materials will be presented. Combination of graphene oxide (GO) and MoS2 flakes with metal nanoparticles conforms a platform with particular characteristics, highlighted by the synergy of the properties from individual components. The assembly of the components in a single integrated and stable hybrid nanomaterial either in aqueous dispersion or deposited on a substrate, is achieved using chemical and electrochemical methods, for subsequent physicochemical characterization. Incorporation of nanoparticles in two-dimensional networks directly or through functionalization of 2D flakes, enables new capabilities for use in ultrasensitive detection of analytes by SERS spectroscopy or in electrochemical hydrogen production. Examples of systems under development include assemblies of rGO-AuPdNps, rGO-PdNps, rGO-GO and MoS2-AuNps. Moreover, these nanomaterials have been used as additives in the nickel electrodeposition Watts baths on steel. In these cases, the 2D flakes are included in the crystalline structure of nickel and as a consequence, there is a remarkable increase in electrocatalytic activity with respect to the hydrogen evolution reaction of the electrodes

Summary Background

Gabriela Inés LACCONI

(Contact:+(54) 351 5353866 (ext. 53560);

Doctor in Chemical Sciences at Universidad Nacional de Córdoba. Postdoctoral fellowship of Alexander von Humboldt Foundation at Freie Universität Berlin, Germany (1990-1991).

Current position
Associate Professor at Universidad Nacional de Córdoba (Argentina) since November 2014.
Independent Researcher of CONICET (National Research Council of Argentina) since January 2015.

Main scientific papers from last years
– “Spectroelectrochemical study of picolinic acid adsorption during silver electrodeposition” C.I Vázquez, G.Andrade, M.L.Temperini, G.I.Lacconi
– “CVD Graphene transferred with Au Nanoparticles: an Ideal Platform for TERS and SERS on a Single Triangular Nanoplate”. L.A. Pérez, M.C. Dalfovo, H. Troiani, A. Soldati, G.I. Lacconi, F.J. Ibañez. DOI: 10.1021/acs.jpcc.5b12372
– “Synthesis and properties of nickel-graphene hybrid for hydrogen evolution reaction”. E. A. Franceschini, G. I. Lacconi. DOI: 10.1007/s12678-017-0415-5
– “Highly efficient hybrid Ni/nitrogenated-graphene electrocatalysts for hydrogen evolution reaction”. M. Gómez, A. Loiácono, L. Pérez, E. Franceschini, G. Lacconi DOI: 10.1021/acsomega.8b02895
– “Atomic force microscopy and Raman spectroscopy: a versatile combination for tailoring graphene oxide/reduced graphene oxide hybrid materials”. L.A. Pérez, N. Bajales Luna, G.I. Lacconi.
– “Enhanced hydrogen evolution activity of Ni[MoS2] hybrids in alkaline electrolyte”. A. Loiácono, M.J. Gómez, E.A. Franceschini, G.I. Lacconi. DOI: 10.1007/s12678-020-00588-w.

Research experience
-Electrodeposition of metallic nanoparticles on few layers graphene, graphene oxide and HOPG.
Electrochemical characterization by Raman in-situ spectroscopy.
– Functionalization of atomically smooth surfaces of silicon for the electrochemical generation of metallic nanostructures.
– Control and characterization of hybrids platforms with high sensitivity for detection of adsorbates, designed with graphene, MoS2 or WS2 and electrodeposited plasmonic nanoparticles, by SERS, TERS and electrochemical methods.
– Development of new hybrid materials for the production of hydrogen in alkaline electrolyzers.

Teaching experience
– Professor position since 1993-present. Lessons in Graduate Courses (Basic cicle and Bachelor in Chemistry) in the Faculty of Chemistry at Universidad Nacional de Córdoba (Argentina).
– Supervisor of Final thesis work from 16 students of Chemistry Bachelor in different disciplines of Physical Chemistry (six months period each).

Postgraduate human resources training
Ph D supervisor of 5 (five) fellowships (finished) and 2 (two) in current function.
Postdoctoral supervisor of 4 (four) fellowships and one researcher of CONICET.

Institutional management activities
-Head of Physical Chemistry Department at Chemical Sciences Faculty in the Universidad Nacional
de Córdoba (2016-2018).
-Responsible researcher in charge of the high-resolution Raman Microscope Horiba LabRAM HR in
the Nanoscopy and Nanophotonics Laboratory (LANN), at INFIQC-CONICET Microscopy
Laboratory (since 2013).
-Secretary of the Argentine Association of Physical Chemistry Investigation (aaifq) in Argentine