A5069242200- Ion-surface interactions and analysis
- Nuclear Materials and Properties
- Fusion materials and technologies
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- X-ray Spectroscopy and Fluorescence Analysis
- Orthopedic Infections and Treatments
- Orthopaedic implants and arthroplasty
- Bone Tissue Engineering Materials
- Medical Imaging and Pathology Studies
- Nuclear Physics and Applications
- Advanced X-ray and CT Imaging
- Electron and X-Ray Spectroscopy Techniques
- Graphene and Nanomaterials Applications
- Cellular Mechanics and Interactions
- Airway Management and Intubation Techniques
- Tracheal and airway disorders
- Anodic Oxide Films and Nanostructures
- 3D Printing in Biomedical Research
- Neuroscience and Neural Engineering
- Advanced Materials Characterization Techniques
- Copper Interconnects and Reliability
- Polymer Surface Interaction Studies
- Chalcogenide Semiconductor Thin Films
Jožef Stefan Institute
2019-2024
Universidad Autónoma de Madrid
2011-2016
Institute of Applied Physics
2012
Material Physics Center
2011
Porous tantalum has been extensively used in orthopaedic surgery, including uncemented total knee arthroplasty (TKA). Favourable results were reported with earlier monobloc tibial components and the design evolved to modular implants. We aimed analyse possible causes for extensive medial tibia bone loss, resulting porous baseplate fracture after primary TKA. Retrieved tissue samples scanned 3 MeV focused proton beam Proton-Induced X-ray Emission (micro-PIXE) elemental analysis. Fractographic...
The influence of grain boundaries on deuterium (D) retention and transport was investigated in nanocrystalline tungsten (W) by exposing the samples to sub eV D atoms. Thin films with nanometer-sized grains were produced pulsed laser deposition substrates. Their size increased up one micrometer thermal annealing vacuum 1223 K. Irradiation damage created 20 MeV W ions at 290 transmission electron microscopy analysis showed order magnitude larger dislocation density nanometer-grained compared...
Radiation-induced defect production in tungsten was studied by a combination of experimental and simulation methods. The analysis structural defects performed using multi-energy Rutherford backscattering spectroscopy channeling configuration (multi-energy C-RBS). To create different microstructures, (111) (W) single crystals were irradiated with W ions at two doses (0.02 0.2 dpa) 290 K. Detailed transmission electron microscopy (TEM) the samples revealed presence dislocation lines loops...
Abstract The surface properties of porous silicon (PSi) evolve rapidly in phosphate‐buffered saline. X‐ray photoelectron spectra indicate the formation a Si–OH and C–O enriched surface, which becomes increasingly hydrophilic with aging time. Multiscale stripe micropatterns Si PSi have been fabricated by means high‐energy ion‐beam irradiation process. These aged physiological conditions used to analyze human mesenchymal stem cell (hMSC) adhesion. actin cytoskeleton hMSCs orients following...
The engineering of surface patterns is a powerful tool for analyzing cellular communication factors involved in the processes adhesion, migration, and expansion, which can have notable impact on therapeutic applications including tissue engineering. In this regard, main objective research was to fabricate patterned textured surfaces at micron- nanoscale levels, respectively, with very different chemical topographic characteristics control cell-substrate interactions. For task,...
The localized irradiation of Si allows a precise patterning at the microscale nanostructured materials such as porous silicon (PS). PS patterns with precisely defined geometries can be fabricated using ion stopping masks. nanoscale textured micropatterns were used to explore their influence microenvironments for human mesenchymal stem cells (hMSCs). In fact, change photoluminescence emission from upon aging in physiological solution suggests intense formation silanol surface groups, which...
The increased modularity in the total hip arthroplasty (THA) allows adapting prosthesis to specific anatomical characteristics of each patient. However, advantages modular THA are shadowed by number failures observed patients. presence junction may increase its risk mechanical failure. Moreover, micro movements between neck and stem could lead production metallic debris which cause tissue inflammation unsealing due osseous dissolution. It is necessary understand mechanism dispersion metal...
The metallic-associated adverse local tissue reactions (ALTR) and events accompanying worn-broken implant materials are still poorly understood on the subcellular molecular level. Current immunohistochemical techniques lack spatial resolution chemical sensitivity to investigate causal relations between material biological response submicron even nanoscale. In our study, new insights of titanium alloy debris-tissue interaction were revealed by implementation label-free high-resolution...
The influence of grain boundaries (GBs) on the deuterium (D) transport and creation defects in nanocrystalline tungsten (W) films deposited W substrate was studied. Samples with three different size were produced for this purpose: sample nanometer size, hundred grains micrometer size. irradiated by 20 MeV ions at 300 K to create displacement damage exposed eV D 450 populate created any pre-existing defects. retention assessed measuring depth profiles after certain exposure times nuclear...
Nuclear reaction analysis (NRA-C) together with Rutherford backscattering spectrometry (RBS-C), both in a channeling configuration were used to study the location of deuterium (D) irradiation-induced defects tungsten (W) using 3He probe beam. The created by W ion irradiation at two different damage doses 0.02 and 0.2 dpa temperatures 290 K 800 K. Angular scans over 〈1 0 0〉 axial channel showed that for irradiated samples NRA yield peaks centre channel, where RBS is its minimum. For...
Elemental surface topography information in microscopic material characterization contributes to a better understanding of surfaces, interfaces, substrates, and their applications. Here, general approach based on microbeam proton-induced X-ray emission (micro-PIXE) reconstruct the three-dimensional (3D) elemental using annular multisegment silicon drift detector has been demonstrated. The proposed method includes four main steps: acquiring two-dimensional concentration maps multichannel...
The properties of TiN can be gradually transformed by implantations in the 10–40 keV range and fluences 5 × 10 13 –5 16 cm −2 range. resulting structure consists shallow x O y (TiNO)/TiN contrasts with increased resistivity on top layer. In fact, oxygen actively replaces nitrogen implanted region as illustrated Rutherford backscattering spectrometry. N substitutions vacancies lattice induce structural distortions strain generation x-ray diffraction, high resolution transmission electron...
Nanoporous titania (nPTI) has been prepared by electrochemical processes and functionalized photochemical activation of condensed acrylic acid vapors (AcAc). The nPTI surfaces obtained after etching in HF electrolytes at constant potential consisted nanotube disordered arrays. Elastic recoil detection Rutherford backscattering spectroscopy studies confirm the presence an in-depth carbon based layer, previous to AcAc polymerization. subsequent functionalization affected only a few molecular...
In this work nanostructured porous silicon (nanoPS) was used for the fabrication of surface micropatterns aiming at controlling cell adhesion and migration. particular, patterns nanoPS Si were engineered by high-energy ion-beam irradiation subsequent anodization. It found that human skeletal progenitor cells are sensitive to oneand two-dimensional focal is inhibited on areas. spite anti-fouling characteristics, studies with reduced areas show conform pathways favoring migration through...
A full characterization of plasma polymerized biofunctional films requires the use multi-analytical approaches to determine chemical composition, topography and potential interaction mechanisms such with biomolecules cells. In this work we aim at underlining versatility ion-based techniques contribute surfaces. The simultaneous energy recoil detection (ERD) Rutherford backscattering (RBS) spectroscopies incident He ions is an example versatility. Performing sequential measurements...
The radiation-induced defect production and damage evolution in tungsten was studied by a combination of experimental simulation methods. analysis structural defects induced ion irradiation is performed using Rutherford backscattering spectroscopy channeling configuration (C-RBS) utilizing multiple probing beam energies. With this aim, the (111) single crystals were irradiated with 10.8 MeV ions at two different doses (0.02 0.2 dpa) 290 K to create microstructures material. Detailed...