(UNC-CONICET)
Topic: Graphene oxide-based composite materials for the development of multiplexed platforms.
Laminar graphene oxide (GO) is currently a high-impact material for electrode design of interest in sensing and charge storage devices[1].In fact, since GO exhibits a singular chemical and physical nature, it provides a large range of possibilities to tailor and build multiplexed platforms. These platforms arises as multifunctional systems due to their selective capacity in electrical conductivity, magnetic nanostructure coupling, hydrophobicity and ionic transport, among other properties. The efficiency of this latter versatile behavior is mainly supported on the presence of intrinsic functional groups of GO used as source. Thus, starting from an isolating, hydrophobic and diamagnetic material, it is feasible to obtain a family of composites, characterized by different electrical conductivities, diverse grades of hydrophobicity and new magnetic attributes, by employing methods of controlled GO reduction [2] and/or intercalation of nanostructures [3].
In this talk, results on preparation and structural, topographical, vibrational and chemical characterization of composites based on graphene oxide and reduced graphene oxide (GO/rGO), on the one side, and graphene oxide decorated with permalloy nanowires (Py NWs/GO), on the other side, will be presented. Examples of hybrid structures built by means of low-cost, easy-implementation and scalable experimental strategies will be shown. Such structures are of current interest as materials of electrodes in sensing and charge storage devices.
References:
[1] L. A. Pérez, N. Bajales, G. I. Lacconi, Raman spectroscopy coupled with AFM scan head: A versatile combination for tailoring graphene oxide/reduced graphene oxide hybrid materials, Applied Surface Science 495, 2019, 143539.
[2] D. M. Arciniegas Jaimes, P. Márquez, A. Ovalle, J. Escrig, O. Linarez Pérez, N. Bajales, Multifunctional Permalloy nanowires/graphene oxide composite with enhanced conductive properties, Scientific Reports 10, 2020, 13742.
Summary Background
Noelia Bajales Luna graduated with a degree in Physics (2004) and in Electric Engineering (2003), from the Universidad Nacional del Nordeste (UNNE, Corrientes). She was CONICET PhD fellow at INTEC (Santa Fe) and first Doctor in Physics graduated from UNL (2009), in the Surface Science field, with a PhD tesis focused on charge transfer processes and secondary electron emission in graphite and aluminum. She was CONICET postdoctoral fellow (2010) at INTEC-UNL, and DAAD posdoctoral fellow (2011) at the KIT (Karlsruhe, Alemania). During both postdoctoral stays, she carried out topics related to Nanoscience and Nanotechnology of Carbon-based materials and alumina. Since 2012 she is member of the CIC at IFEG, developing activities in the Carbon-based systems and porous alumina membranes for synthesis of magnetic nanostructures. Since 2016 is Adjoint Researcher (CONICET) and Adjoint Prof. (UNC) at the Grupo Ciencia de Materiales (FAMAF-UNC).
Her current scientific research is focused on the Design, preparation and characterization of magnetic carbon-based systems and porous alumina membranes for different applications. Since 2018 supports her experimental profile as researcher with micromagnetic simulations. In the framework of these topics, she supervised and led the research work of 3 intership students, 7 undergraduated students, 1 CONICET PhD student (currently) and 1 CONICET postdoctoral fellow.