A5071939874- Perovskite Materials and Applications
- ZnO doping and properties
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- TiO2 Photocatalysis and Solar Cells
- Gas Sensing Nanomaterials and Sensors
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Surface Modification and Superhydrophobicity
- Molecular Junctions and Nanostructures
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Analytical Chemistry and Sensors
- Porphyrin and Phthalocyanine Chemistry
- Copper-based nanomaterials and applications
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Carbon Nanotubes in Composites
- Photochemistry and Electron Transfer Studies
- Surface Chemistry and Catalysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Luminescence and Fluorescent Materials
- Photonic and Optical Devices
- Catalytic Processes in Materials Science
Instituto de Ciencia de Materiales de Sevilla
2016-2025
Consejo Superior de Investigaciones Científicas
2010-2024
Universidad de Sevilla
2011-2024
Centro de Investigaciones Científicas Isla de la Cartuja
2024
Polytechnique Montréal
2022
Fraunhofer Institute for Interfacial Engineering and Biotechnology
2022
Ruhr University Bochum
2022
University of Bari Aldo Moro
2022
Instituto de Ciencia de Materiales de Madrid
2021
Swiss Federal Laboratories for Materials Science and Technology
2009-2019
The bottom-up approach to synthesize graphene nanoribbons strives not only introduce a band gap into the electronic structure of but also accurately tune its value by designing both width and edge ribbons with atomic precision. We report synthesis an armchair nanoribbon nine carbon atoms on Au(111) through surface-assisted aryl-aryl coupling subsequent cyclodehydrogenation properly chosen molecular precursor. By combining high-resolution force microscopy, scanning tunneling Raman...
A compromise between high power conversion efficiency and long-term stability of hybrid organic-inorganic metal halide perovskite solar cells is necessary for their outdoor photovoltaic application commercialization. Herein, a method to improve the under water moisture exposure consisting encapsulation cell with an ultrathin plasma polymer reported. The deposition carried out at room temperature by remote vacuum adamantane powder. This does not affect performance tested devices virtually...
Porous TiO2 thin films deposited by glancing angle deposition are used as sensing layers to monitor their capabilities towards Volatile Organic Compounds both in a standard Surface Plasmon Resonance (SPR) sensor and Magneto-Optical (MO-SPR) configuration order compare performances. Here our results on the enhanced capability of these functionalized MO-SPR sensors with Au/Co/Au transducers respect traditional SPR gas presented.
The interaction of hybrid organic–inorganic halide perovskite and selective contacts is crucial to get efficient, stable hysteresis-free perovskite-based solar cells.
This paper reports a thorough microstructural characterization of glancing angle deposited (GLAD) TiO2 thin films. Atomic force microscopy (afm), grazing-incidence small-angle x-ray scattering (GISAXS) and water adsorption isotherms have been used to determine the evolution porosity existence some correlation distances between nanocolumns constituting basic elements film's nanostructure. It is found that deposition and, lesser extent, film thickness are most important parameters controlling...
Carbon-based nanomaterials such as graphene are at a crucial point in application development, and their promising potential, which has been demonstrated the laboratory scale, must be translated to an industrial setting for commercialization. Graphene nanoribbons particular overcome one limitation of some electronic applications because they exhibit sizeable bandgap. However, synthesis bottom-up is most commonly performed under ultra-high vacuum conditions, costly difficult maintain...
Open porous and transparent microcolumnar structures of TiO2 prepared by physical vapour deposition in glancing angle configuration (GLAD-PVD) have been used as host matrices for two different fluorescent cationic porphyrins, 5-(N-methyl 4-pyridyl)-10,15,20-triphenyl porphine chloride (MMPyP) meso-tetra (N-methyl 4-pyridyl) tetrachloride (TMPyP). The porphyrins anchored electrostatic interactions to the microcolumns self-assembly through dip-coating method. These porphyrin/TiO2 composites...
A bottom up method for the synthesis of unique tetracene-based nanoribbons, which incorporate cyclobutadiene moieties as linkers between acene segments, is reported. These structures were achieved through formal [2+2] cycloaddition reaction ortho-functionalized tetracene precursor monomers. The formation mechanism and electronic magnetic properties these nanoribbons comprehensively studied by means a multitechnique approach. Ultra-high vacuum scanning tunneling microscopy showed occurrence...
We devise a unique heteronanostructure array to overcome persistent issue of simultaneously utilizing the surface-enhanced Raman scattering, inexpensive, Earth-abundant materials, large surface areas, and multifunctionality demonstrate near single-molecule detection. Room-temperature plasma-enhanced chemical vapor deposition thermal evaporation provide high-density arrays vertical TiO2 nanotubes decorated with Ag nanoparticles. The role is 3-fold: (i) providing high area for homogeneous...
Nanogenerators and self-powered nanosensors have shown the potential to power low-consumption electronics human-machine interfaces, but their practical implementation requires reliable, environmentally friendly scalable, processes for manufacturing processing. This article presents a plasma synthesis approach fabrication of piezoelectric nanogenerators (PENGs) sensors on paper substrates. Polycrystalline ZnO nanocolumnar thin films are deposited by plasma-enhanced chemical vapour deposition...
This article presents a reproducible and affordable methodology for fabricating organic nanowires (ONWs) nanotrees (ONTs) as light-enhanced conductometric O2 sensors. protocol is based on solventless procedure the formation of high-density arrays interdigitated electrodes. The synthesis combines physical vapour deposition self-assembled growth free-phthalocyanine soft plasma etching to prompt nucleation sites as-grown ONWs allow nanotrees. Electrical conductivity in such low-dimensional...
TiO2 thin films in the form of anatase have been prepared by plasma enhanced chemical vapor deposition (PECVD) at 523 K as substrate temperature and a low working pressure. The study microstructure texture different stages show that their growth follows Kolmogorov's model developed to describe evolution crystalline from saturated homogeneous medium. An additional characteristic feature process PECVD is formation domains, particularly rates. effects this parameter characteristics on growing...
Transparent nanocolumnar porous ZnO thin films have been prepared by plasma-enhanced chemical vapor deposition. By controlling the H2/O2 ratio in plasma gas, deposition conditions were optimized to obtain an intense exciton emission at around 381 nm and virtually no luminescence visible region associated with electronic states gap. The intensity of band varied significantly reversibly partial pressure oxygen environment. This behavior its variations temperature water sustain use these as...
Abstract The main handicap still hindering the eventual exploitation of organometal halide perovskite‐based solar cells is their poor stability under prolonged illumination, ambient conditions, and increased temperatures. This article shows for first time vacuum processing most widely used solid‐state hole conductor (SSHC), i.e., Spiro‐OMeTAD [2,2′,7,7′‐tetrakis ( N , ‐di‐ p ‐methoxyphenyl‐amine) 9,9′‐spirobifluorene], how its dopant‐free crystalline formation unprecedently improves...
Fluorescent tetracationic porphyrin (TMPyP) molecules have been incorporated into optically transparent TiO2 thin films acting as a host material. The films, with columnar structure and open pores, were prepared by electron evaporation at glancing angles (GAPVD). porosity of the has estimated measuring water adsorption isotherm quartz crystal monitor. TMPyP infiltrated in their immersion solutions controlled values pH. state adsorbed molecules, infiltration efficiency, kinetics assessed...
In this article we present a new type of 1D nanostructures consisting supported hollow ZnO nanorods (NRs) decorated with Ag nanoparticles (NPs). The 3D reconstruction by high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) tomography reveals that the NPs are distributed along interior NRs. Supported and vertically aligned Ag-NPs@ZnO-NRs grow at low temperature (135 °C) plasma enhanced chemical vapour deposition on heterostructured substrates fabricated...
Abstract Herein, the preparation of 1D TiO 2 nanocolumnar films grown by plasma‐enhanced chemical vapor deposition is reported as electron selective layer (ESL) for perovskite solar devices. The impact ESL architecture (1D and 3D morphologies) nanocrystalline phase (anatase amorphous) analyzed. For anatase structures, similar power conversion efficiencies are achieved using an either nanocolumns or classical nanoparticle film. However, lower different optoelectronic properties found devices...
We introduce herein the advanced application of low-pressure plasma procedures for development piezo and triboelectric mode I hybrid nanogenerators. Thus, assisted deposition functionalization methods are presented as key enabling technologies nanoscale design ZnO polycrystalline shells, formation conducting metallic cores in [email protected] nanowires, solventless surface modification polymeric coatings matrixes. show how perfluorinated chains grafting polydimethylsiloxane (PDMS) provides...
Abstract Despite the youthfulness of hybrid halide perovskite solar cells, their efficiencies are currently comparable to commercial silicon and have surpassed quantum‐dots cells. Yet, scalability these devices is a challenge due low reproducibility stability under environmental conditions. However, techniques reported date tackle such issues recurrently involve use solvent methods that would further complicate transfer industry. Herein reliable alternative relaying in implementation an...
Abstract A simple method is presented to tune the gold surface plasmon resonance (SPR) modes by growing anisotropic nanoparticles into transparent SiO 2 thin films prepared glancing angle deposition. In this type of composite film, anisotropy nanoparticles, proved gracing incidence small X‐ray scattering, determined tilted nanocolumnar structure host and yields a strong film dichroism evidenced change from an intense colored nearly aspect depending on light polarization and/or sample...