Transport of non-thermal deposition particles in an argon plasma at low pressures, in connection with the thin film nanostructure

Presentación invitada en el 17th International Colloquium on Plasma ProcessesPeer reviewe

De los centros TIC al PRODIG: evolución de los planes de formación del profesorado

En el presente trabajo abordaremos parte de los resultados de una investigación en la que hemos analizado la evolución de los planes de formación de la Consejería de Educación de la Junta de Andalucía para favorecer la implementación de los distintos planes de introducción de las TIC en las aula desde la puesta en marcha de los llamados “centros TIC” hasta el Programa de Digitalización de Centro (PRODIG) iniciado en este curso 2018-2019. Desde que la Junta de Andalucía aprobó el Decreto 72/2003 de Medidas de Impulso de la Sociedad del Conocimiento, la apuesta de la administración por la formación del profesorado de enseñanzas obligatorias fue muy ambiciosa. En general el impacto en los centros por el proyecto TIC fue muy positivo en opinión de la mayoría de los docentes, destacando principalmente el aumento en la motivación del alumnado. A pesar de ello, la formación ofrecida por parte de la administración era una de las mejoras que se demandaban. El siguiente plan de introducción de tecnología en las aula fue el proyecto “Escuela TIC 2.0”, que dotó a los centros de aulas con pizarras digitales y conexión Wifi, así como de dispositivos portátiles para el alumnado. En este caso, el profesorado manifestó igualmente la necesidad de una formación más centrada en los pedagógico que en lo tecnológico y que diera prioridad a fomentar los cambios metodológicos que se demandaban en los procesos de enseñanza-aprendizaje. La última apuesta (PRODIG) se ha iniciado este curso 2018-2019 con el fin de fomentar el cambio metodológico en los centros educativos, partiendo de la base expuesta en diferentes estudios previos realizados que afirman que la mera dotación tecnológica de los centros docentes no implica cambios en los procesos de enseñanza-aprendizaje si no se sustenta en cambios pedagógicos profundos que surjan de las necesidades de cada uno de los centros educativos.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

Surface nanostructuring of TiO2 thin films by high energy ion irradiation

The effects of a high ion dose irradiation on TiO2 thin films under different conditions of temperature and ion nature are discussed. We have shown that anatase TiO2 thin films irradiated with N+ ions at room temperature develop a typical microstructure with mounds and voids open to the surface whereas irradiations at 700 K generate a surface pattern of well-ordered nanorods aligned with the ion beam. The formation of these patterns is caused by the simultaneous effect of ion irradiation near the film surface and a film temperature favoring the structural mobilization of the defective network of the material. To explain these phenomena, a qualitative model has been proposed and further tested by irradiating the TiO2 thin films with F+ and S+ ions under different conditions. The obtained results demonstrate that ion irradiation techniques enable the formation of tilted nanorod surface patterns with lengths of about 100 nm on anatase TiO2 thin films. © 2010 The American Physical Society.Peer Reviewe

Fabrication of black-gold coatings by glancing angle deposition with sputtering

The fabrication of black-gold coatings using sputtering is reported here. Glancing angle deposition with a rotating substrate is needed to obtain vertical nanostructures. Enhanced light absorption is obtained in the samples prepared in the ballistic regime with high tilt angles. Under these conditions the diameter distribution of the nanostructures is centered at about 60 nm and the standard deviation is large enough to obtain black-metal behavior in the visible rangeEspaña Mineco MAT2014-59772-C2-1 MAT2015-69035-RED

Surface nanostructuring of TiO2 thin films by ion beam irradiation

This work reports a procedure to modify the surface nanostructure of TiO2 anatase thin films through ion beam irradiation with energies in the keV range. Irradiation with N+ ions leads to the formation of a layer with voids at a depth similar to the ion-projected range. By setting the ion-projected range a few tens of nanometers below the surface of the film, well-ordered nanorods appear aligned with the angle of incidence of the ion beam. Slightly different results were obtained by using heavier (S+) and lighter (B+) ions under similar conditions

Characterization of Alkanolamine Blends for Carbon Dioxide Absorption. Corrosion and Regeneration Studies

There are a lot of research programs focusing on the development of new solvents for carbon dioxide capture. The most important priority should be reducing the energy consumption needed at the regeneration step, but minimizing solvent degradation and its corrosivity is also considered as a priority. In this research, the aqueous blends of 2-amino-2-methyl-1-propanol (AMP: 1 kmol·m−3) and 1-amino-2-propanol (MIPA: 0.1–0.5 kmol·m−3) are characterized in terms of density, viscosity, and surface tension. The carbon dioxide absorption rate and capacity, the regeneration capacity, and the corrosivity of these solvents are also evaluatedFinancial support for this research was obtained under the Project UJA 2016/08/07: “Development of more efficient solvents for carbon dioxide capture-2” (I+D+i Support Plan of the University of Jaen), for which we are gratefulS

Nanostructure of Thin Films Grown by Deposition of Isotropically Distributed Gaseous Particles

: Presentación en la conferencia “12th International Conference on Plasma Surface Engineering”Peer reviewe

Nanostructured Ti thin films by magnetron sputtering at oblique angles

The growth of Ti thin films by the magnetron sputtering technique at oblique angles and at room temperature is analysed from both experimental and theoretical points of view. Unlike other materials deposited in similar conditions, the nanostructure development of the Ti layers exhibits an anomalous behaviour when varying both the angle of incidence of the deposition flux and the deposition pressure. At low pressures, a sharp transition from compact to isolated, vertically aligned, nanocolumns is obtained when the angle of incidence surpasses a critical threshold. Remarkably, this transition also occurs when solely increasing the deposition pressure under certain conditions. By the characterization of the Ti layers, the realization of fundamental experiments and the use of a simple growth model, we demonstrate that surface mobilization processes associated to a highly directed momentum distribution and the relatively high kinetic energy of sputtered atoms are responsible for this behaviourJunta de Andalucía P12-FQM- 2265Ministerio de Ciencia e Innovación CSD2008- 00023, MAT2013-42900-P, MAT2013-40852-R, MAT2014-59772-C2-1, MAT2011- 2908

NANOIMPLANT: nanostructured biocompatible coatings to prevent orthopedic implant infections

Comunicación presentada en el ImagineNano, celebrado en Bilbao del 10 al 13 de marzo de 2015.Bacterial colonization and biofilm formation on orthopedic implants is one of the worst possible scenarios in orthopedic surgery, in terms of both patient prognosis and healthcare costs. Tailoring the surface of these orthopedic implants to actively promote bone bonding, while avoiding bacterial colonization, represents an interesting challenge to reach better clinical outcomes. Currently, it has been demonstrated a strong dependence of structural features in the nano-scale with antibacterial effects. Several naturally existing surfaces such as plant leaves and insect wings are capable of maintaining a contaminant-free status despite the innate abundance of contaminants in their surrounding environments. These properties are related to the presence of a periodic topography of hexagonal arrays of nanopillar on their surfaces. By mimicking the nature, and to translate this effect to orthopedic metallic biomaterials, a Ti6Al4V alloy of medical grade has been coated with Ti nanostructures employing the glancing angle deposition technique by magnetron sputtering. The resulting surfaces have a high density of nanocolumnar structures based on Ti, providing high roughness and a notable decrease of wettability. These nanostructured coatings exhibit a selective behavior towards osteoblast and bacteria proliferation. While these nanotextured surfaces strongly impair bacteria adhesion and inhibit biofilm formation, the osteoblasts exhibit almost identical behavior than that obtained onto the initial Ti6Al4V substrates. This selective behavior is discussed on the basis of a “lotus leaf effect” induced by the nanostructured surface and the different size of osteoblasts and bacteria. The obtained results provide new perspectives for manufacturing Ti6Al4V-based implants to prevent infections. Moreover, it is also worth noticing that our work has won the 2014 IDEA² Madrid Award of the Madrid-MIT M+Vision Consortium, a partnership of the regional government of Madrid and the Massachusetts Institute of Technology (MIT), which fosters innovation in biotechnology.Peer Reviewe