Helena Varela-Rizo
University of Alicante
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Publication
Featured researches published by Helena Varela-Rizo.
ACS Nano | 2012
Helena Varela-Rizo; Ignacio Martin-Gullon; Mauricio Terrones
Graphene oxide (G-O), a highly oxidized sheet of sp(2)-hybridized carbon with insulating electrical properties, can be transformed into graphene if it is adequately reduced. In the past, researchers believed that reduced G-O (rG-O) could be highly conducting, but it has been shown that the presence of extended vacancies and defects within rG-O negatively affect its electrical transport. Although these observations indicated that rG-O could not be used in the fabrication of any electronic device, in this issue of ACS Nano, Ruoffs group demonstrates that rG-O can indeed be used for producing efficient transparent conducting films (TCFs) if the rG-O material is coupled with Au nanoparticles (Au-NPs) and Ag nanowires (Ag-NWs). The work further demonstrates that these hybrid films containing zero-dimensional (Au-NPs), one-dimensional (Ag-NWs), and two-dimensional (rG-O) elements exhibit high optical transmittance (e.g., 90%) and low sheet resistance (20-30 Ω/□), with values comparable to those of indium tin oxide (ITO) films. In addition, Ruoffs group notes that the presence of Ag-NWs and rG-O in the films showed antibacterial properties, thus demonstrating that it is now possible to produce flexible TCFs with bactericidal functions. The data show that smart hybrid films containing rG-O and different types of NPs and NWs could be synthesized easily and could result in smart films with unprecedented functions and applications.
Carbon | 2007
José Vera-Agullo; Helena Varela-Rizo; Juan A. Conesa; Cristina Almansa; César Merino; Ignacio Martin-Gullon
Carbon | 2009
Matthew C. Weisenberger; Ignacio Martin-Gullon; José Vera-Agullo; Helena Varela-Rizo; César Merino; Rodney Andrews; Dali Qian; Terry D. Rantell
Carbon | 2015
Iluminada Rodriguez-Pastor; Gloria Ramos-Fernández; Helena Varela-Rizo; Mauricio Terrones; Ignacio Martin-Gullon
Carbon | 2010
Helena Varela-Rizo; Iluminada Rodriguez-Pastor; César Merino; Ignacio Martin-Gullon
Composites Science and Technology | 2010
Helena Varela-Rizo; Matthew C. Weisenberger; Daniel R. Bortz; Ignacio Martin-Gullon
Composites Part A-applied Science and Manufacturing | 2012
Helena Varela-Rizo; S. Bittolo-Bon; Iluminada Rodriguez-Pastor; L. Valentini; Ignacio Martin-Gullon
Journal of Analytical and Applied Pyrolysis | 2007
José Vera-Agullo; Helena Varela-Rizo; Rafael Font; Juan A. Conesa; Ignacio Martin-Gullon
Journal of Materials Research | 2011
Helena Varela-Rizo; Iluminada Rodriguez-Pastor; César Merino; Mauricio Terrones; Ignacio Martin-Gullon
Journal of Applied Polymer Science | 2012
Iluminada Rodriguez-Pastor; Helena Varela-Rizo; D. R. Bortz; G. Montes de Oca; I. Guinea; Ignacio Martin-Gullon