A5031403632- Force Microscopy Techniques and Applications
- Ionic liquids properties and applications
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Molecular Junctions and Nanostructures
- Electrochemical Analysis and Applications
- Bacterial biofilms and quorum sensing
- Crystallography and molecular interactions
- Nanofabrication and Lithography Techniques
- Adhesion, Friction, and Surface Interactions
- Optical Coatings and Gratings
- Metallic Glasses and Amorphous Alloys
- Mechanical and Optical Resonators
- Magnetic Properties and Applications
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Advanced Surface Polishing Techniques
- Surface Modification and Superhydrophobicity
- Analytical Chemistry and Sensors
- bioluminescence and chemiluminescence research
- Clay minerals and soil interactions
- Microfluidic and Bio-sensing Technologies
- Antimicrobial Peptides and Activities
- Polymer Surface Interaction Studies
- Geochemistry and Elemental Analysis
Madrid Institute for Advanced Studies
2015-2025
IMDEA Nanoscience
2017-2024
Universidad Autónoma de Madrid
2020-2022
Instituto de Estudios Avanzados
2022
Technologies pour la Santé
2020
KTH Royal Institute of Technology
2018-2020
Stockholm Environment Institute
2020
Universidad de Salamanca
2012-2015
The sliding of a sharp nanotip on graphene completely immersed in water is investigated by molecular dynamics (MD) and atomic force microscopy. MD simulations predict that the atomic-scale stick–slip almost identical to found ultrahigh vacuum. Furthermore, they show plays purely stochastic role (solid-to-solid) friction. These observations are substantiated friction measurements grown Cu Ni, where, oppositely operation air, lattice resolution readily achieved. Our results promote microscopy...
Control of the interfacial structures ionic liquids (ILs) at charged interfaces is important to many their applications, including in energy storage solutions, sensors and advanced lubrication technologies utilising electric fields.
In this study, the crystallization kinetics of TiO2 thin films deposited by reactive magnetron sputtering is investigated. The aim to identify optimal growth conditions for X-ray amorphous subjected post-deposition annealing.Different modes operation in high-power impulse (HiPIMS) and pulsed direct current (pDCMS) were investigated, together with ionization deposition flux HiPIMS. process was analysed in-situ Grazing Incidence Wide-Angle Scattering. It found that all crystallized into...
Mechano-bactericidal nanomaterials rely on their mechanical or physical interactions with bacteria and are promising antimicrobial strategies that overcome bacterial resistance. However, the real effect of versus chemical action activity is under debate. In this paper, we quantify forces necessary to produce critical damage cell wall by performing simultaneous nanoindentation fluorescence imaging single cells. Our experimental setup allows puncturing an immobilized bacterium tip atomic force...
Abstract Lack of reproducibility hampers molecular devices integration into large-scale circuits. Thus, incorporating operando characterization can facilitate the understanding multiple features producing disparities in different devices. In this work, we report realization hybrid graphene field effect transistors (m-GFETs) based on 11-(Ferrocenyl)undecanethiol (FcC 11 SH) micro self-assembled monolayers (μSAMs) and high-quality (Gr) a back-gated configuration. On one hand, Gr enables redox...
When the shear stress on a compliant surface exceeds yield strength of material, periodic wrinkle pattern is often observed. This phenomenon has been also recognized at nanometer scale polymers, metals, ionic crystals and semiconductors. In those cases, mechanical can be efficiently provided by sharp indenter elastically driven constant velocity along surface. Here we suggest that formation such ripples explained competition between driving spring force plastic response substrate....
Neutron reflectivity and atomic force microscopy results reveal the electroresponsive interfacial structuring nano-frictional properties of ionic liquid (IL) lubricant mixtures with a polar solvent are strongly dependent on bulk IL concentration.
Wear on the nanoscale, as evidenced by formation of periodic ripples a model polystyrene thin film while sharp tip is sliding it with normal force in μN range, shown to be suppressed application ultrasonic vibrations amplitude Aexc. An accurate calibration transducer excitation achieved home-built setup based laser Doppler vibrometer. The corrugation typical ripple pattern that formed absence reduced when frequency matches contact resonance system and Aexc progressively increases. Above...
We have studied the influence of anisotropic nanopatterns (ripples) on adhesion and morphology mouse neural stem cells (C17.2) glass substrates using cell viability assay, optical microscopy atomic force microscopy. The ripples were produced by defocused ion beam sputtering with inert Ar ions, which physically remove atoms from surface at energy 800 eV. ripple periodicity (∼200 nm) is comparable to thickness cytoplasmatic microspikes (filopodia) link substrate. All methods show that...
We investigate the interfacial properties of non-halogenated ionic liquid (IL), trihexyl(tetradecyl)phosphonium bis(mandelato)borate, [P6,6,6,14][BMB], in proximity to solid surfaces, by means surface force measurement. The system consists sharp atomic microscopy (AFM) tips interacting with surfaces mica, silica, and gold. find that response has a monotonic form, from which characteristic steric decay length can be extracted. is comparable size ions, suggesting layer formed on surface, but...
The structures produced by a sharp tip scraping compliant surface are modeled in the illustrative case of scan patterns formed series parallel lines. This is made possible modified version Prandtl model for stick-slip friction, with an interaction energy landscape replicating morphology evolving surface. As result, ripple motif emerges tilt angle increasing linearly distance between lines, except region close to left boundary scanned area, where ripples oriented at...
Abstract In recent years, the understanding of bactericidal mechanisms natural surfaces has received great attention to unravel their design principles for development next‐generation mechano‐bactericidal surfaces. Due difficulty in characterizing bacteria–nanostructure interface, many aspects physical interaction between bacteria and surface, underlying mechanisms, remain unclear. This study focuses on evaluating dynamics process case moth‐eye bioinspired topography relation strain...
The influence of ambient levels water on the electroresponsive interfacial structuring and nanofriction ionic liquid lubricant mixtures has been investigated by neutron reflectivity atomic force microscopy.
Abstract Interfacial proximity effects in antiferromagnetic/ferromagnetic (AFM/FM) bilayers control the exchange‐bias (EB) phenomena exploited most spintronic devices, although still is lack of full understanding. Discordant results, including different field ( H E ), coercivity C or blocking temperature T B ) found even similar systems, are usually ascribed to uncontrolled parameters, namely dissimilar interfacial defects, structure, and thicknesses. Here, it shown very same sample that...
Abstract We show that H-bonded host–guest systems associate in ionic liquids (ILs), pure salts with melting point below room temperature, which dipole–dipole electrostatic interactions should be negligible comparison dipole-charge interactions. Binding constants ( K a ) obtained from titrations of four two organic solvents and yield smaller yet comparable values than solvents. also detect the association event using force spectroscopy, confirms binding is not solely due to (de)solvation...
Herein, the fabrication of bioinspired moth‐eye antireflective (AR) films based on surface nanocomposites poly vinylidene fluoride (PVDF) and TiO 2 nanoparticles produced in a single thermal nanoimprint lithography step is described. The incorporation enhances mechanical stability AR topography as demonstrated by nanoindentation tests situ temperature‐dependent grazing incidence X‐ray scattering measurements using synchrotron radiation. effect annealing UV radiation degradation optical...