A5048664424- Ferroelectric and Piezoelectric Materials
- Acoustic Wave Resonator Technologies
- Multiferroics and related materials
- Advanced Sensor and Energy Harvesting Materials
- Force Microscopy Techniques and Applications
- Electronic and Structural Properties of Oxides
- Advanced MEMS and NEMS Technologies
- Conducting polymers and applications
- Mechanical and Optical Resonators
- Advanced Memory and Neural Computing
- Advanced Thermoelectric Materials and Devices
- Advanced ceramic materials synthesis
- Perovskite Materials and Applications
- Ferroelectric and Negative Capacitance Devices
- Advanced Fiber Optic Sensors
- Catalytic Processes in Materials Science
- Semiconductor materials and devices
- Public Health in Brazil
- Electrowetting and Microfluidic Technologies
- Molecular Junctions and Nanostructures
- MXene and MAX Phase Materials
- Advanced materials and composites
- Chalcogenide Semiconductor Thin Films
- Organic and Molecular Conductors Research
- High-Temperature Coating Behaviors
Institut de Ciència de Materials de Barcelona
2014-2024
Consejo Superior de Investigaciones Científicas
2015-2022
Universitat Autònoma de Barcelona
2017-2022
Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine
2019
Centre for Research on Ecology and Forestry Applications
2019
Galaxies, Etoiles, Physique et Instrumentation
2019
Instituto de Ciencia de Materiales de Sevilla
2019
Artifex University
2019
Universitat de València
2010-2014
Parc Científic de la Universitat de València
2012-2013
We investigate the ferroelectric properties of photovoltaic methylammonium lead halide CH3NH3PbI3 perovskite using piezoelectric force microscopy (PFM) and macroscopic polarization methods. The electric is clearly observed by amplitude phase hysteresis loops. However, loop decreases as frequency lowered, persisting for a short time only, in one second regime, indicating that does not exhibit permanent at room temperature. This result confirmed measurement based on standard capacitive method....
We employ direct piezoelectric force microscopy to examine the ferroelectric response of halide perovskites and prove that are ferroelectricity free.
UV-induced switching from p- to n-type character is demonstrated during deposition of carbon-nanotube-conjugated polymer composites. This opens the possibility photopattern regions within an otherwise p-type film, which has a potential for complementary circuitry or, as shown here, thermoelectric generators made single solution.
Bacteria are used to grow in an aqueous medium a cellulose-carbon nanotube composite porous film with good thermoelectric properties, flexibility and recyclability.
Poly(ethylene oxide) is demonstrated to be a suitable matrix polymer for the solution‐doped conjugated poly(3‐hexylthiophene). The polarity of insulator combined with carefully chosen processing conditions permits fabrication tens micrometer‐thick films that feature fine distribution F4TCNQ dopant:semiconductor complex. Changes in electrical conductivity from 0.1 0.3 S cm −1 and Seebeck coefficient 100 60 μV K upon addition correlate an increase doping efficiency 20% 40% heavily doped...
While piezoelectrics and ferroelectrics are playing a key role in many everyday applications, there still number of open questions related to the physics those materials. In order foster understanding ferroelectric pave way future nanoscale characterization these materials is essential. this light, we have developed novel AFM based mode that obtains direct quantitative analysis piezoelectric coefficient d33. This tool capable detecting reveal piezo-charge generation through effect at surface...
Abstract Materials that can couple electrical and mechanical properties constitute a key element of smart actuators, energy harvesters, or many sensing devices. Within this class, functional oxides display specific mesoscale responses which often result in great sensitivity to small external stimuli. Here, novel combination molecular beam epitaxy water‐based chemical‐solution method is used for the design mechanically controlled multilevel device integrated on silicon. In particular,...
Nanoscaled direct and converse piezoelectric responses from sub-100 nm thick epitaxial BiFeO<sub>3</sub> thin films grown by a water-based chemical method.
The magnetic properties of mesoporous cobalt ferrite films can be largely tuned by the application an electric field using a liquid dielectric electrolyte. By applying negative voltage, becomes reduced, leading to increase in saturation magnetization 15% (M
We optimize the elaboration of very thin film poly(vinylidene fluoride) (PVDF) polymer presenting a well-controlled thickness, roughness, and nano-inclusions amount. focused our effort on spin coating technique which is easy to transfer an industrial process. show that it possible obtain continuous smooth films with mean thicknesses 90 nm by properly adjusting concentration viscosity PVDF solution as well rate substrate temperature The electro-active phase content versus magnetic structural...
The electronic and optical properties of two-dimensional layered materials allow the miniaturization nanoelectronic optoelectronic devices in a competitive manner. Even larger opportunities arise when two or more layers different are combined. Here, we report on an ultrafast energy efficient strategy, using laser irradiation, which allows bulk synthesis crystalline single-layered lead iodide cavities carbon nanotubes by forming cylindrical van der Waals heterostructures. In contrast to...
Highly crystalline epitaxial Ba0.8Sr0.2TiO3 (BST) thin-films are grown on (001)-oriented LaNiO3-buffered LaAlO3 substrates by pulsed laser irradiation of solution derived barium-zirconium-titanium precursor layers using a UV Nd:YAG source at atmospheric conditions. The structural analyses the obtained films, studied X-ray diffractometry and transmission electron microscopy, demonstrate that processing allows growth tens nm-thick BST films with structure similar to through conventional...
Ferroelectric HfO2 and ZrO2-based materials are promising candidates for next-generation ferroelectric devices, but their characterization is challenging due to complex factors such as crystal phases, degradation mechanisms, local inhomogeneities. In this work, we propose a novel nanosized positive-up-negative-down (PUND) method assess the response of doped-HfO2. This based on actual current probing immune most electrostatic artifacts that plague other electrical atomic force microscopy...
Epitaxial films of piezoelectric α-quartz could enable the fabrication sensors with unprecedented sensitivity for prospective applications in electronics, biology and medicine. However, prerequisites are harnessing crystallization epitaxial tailoring suitable film microstructures nanostructuration. Here, we bring new insights into on silicon (100) from devitrification porous silica control microstructures: show that by increasing quantity devitrifying agent (Sr) it is possible to switch an...
The ability to develop ferroelectric materials using binary oxides is critical enable novel low-power, high-density non-volatile memory and fast switching logic. discovery of ferroelectricity in hafnia-based thin films, has focused the hopes community on this class overcome existing problems perovskite-based integrated ferroelectrics. However, both control doped-HfO2 direct characterization at nanoscale phenomena, are increasingly difficult achieve. main limitations imposed by inherent...
The primary advantage of magnetoelectric heterostructures exhibiting direct effect is the possibility to induce and modulate electrical response ferroelectric phase directly with an external magnetic field (i.e., wirelessly, without applying electric field). Nevertheless, coupling in such commonly limited by substrate clamping which hinders effective strain propagation. In this work, 1 μm thick ferromagnetic Fe-Ga layers were electrodeposited onto rigid Si/Cu substrates subsequently coated...
The monolithic integration of sub-micron quartz structures on silicon substrates is a key issue for the future development piezoelectric devices as prospective sensors with applications based operation in high-frequency range. However, to date, it has not been possible make existing manufacturing methods compatible and structuration by top-down lithographic techniques. Here, we report an unprecedented large-scale fabrication ordered arrays epitaxial nanostructures combination soft-chemistry...
Understanding diffusion of oxygen vacancies in oxides under different external stimuli is crucial for the design ion-based electronic devices, improvement catalytic performance, and so forth. In this manuscript, using an electric field produced by atomic force microscopy tip, we obtain room-temperature coefficient oxygen-vacancies thin films SrTiO3 compressive/tensile epitaxial strain. Tensile strain produces a substantial increase coefficient, facilitating mobility through film....