A5084051683- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Nanomaterials and Printing Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Electron Microscopy Techniques and Applications
- Ferroelectric and Piezoelectric Materials
- Innovative Energy Harvesting Technologies
- Advanced Sensor and Energy Harvesting Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Diamond and Carbon-based Materials Research
- Plasmonic and Surface Plasmon Research
- Mass Spectrometry Techniques and Applications
- Gas Sensing Nanomaterials and Sensors
- Antenna Design and Analysis
- Analytical Chemistry and Chromatography
- Electrochemical Analysis and Applications
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Wireless Power Transfer Systems
- ZnO doping and properties
- Organic Light-Emitting Diodes Research
- Advanced Thermoelectric Materials and Devices
- Nuclear Physics and Applications
- Ga2O3 and related materials
- Advanced X-ray Imaging Techniques
Luxembourg Institute of Science and Technology
2019-2025
Competitive cooling with capacitors Current large-scale devices use vapor compression refrigeration. The efficiency of air conditioners has been optimized, but they can be noisy and rely on problematic greenhouse gases. Two groups now present designs for electrocaloric using lead scandium tantalate that change temperature under an electric field. Y. Wang et al. obtained a very large heat flux only solid materials fan to remove from their device. Torello used fluids transfer, leading...
Abstract Coming up with sustainable sources of electricity is one the grand challenges this century. The research field materials for energy harvesting stems from motivation, including thermoelectrics 1 , photovoltaics 2 and thermophotovoltaics 3 . Pyroelectric materials, converting temperature periodic variations in electricity, have been considered as sensors 4 harvesters 5–7 although we lack devices able to harvest joule range. Here develop a macroscopic thermal harvester made 42 g lead...
The structural, morphological, and chemical characterization of samples is utmost importance for a large number scientific fields. Furthermore, this very often needs to be performed in three dimensions at length scales down the nanometer. Therefore, there stringent necessity develop appropriate instrumentational solutions fulfill these needs. Here we report on deployment magnetic sector secondary ion mass spectrometry (SIMS) type instrument widely used such nanoscale investigations, namely,...
In this study, we present a lead-free, piezoelectric energy harvester capable of generating power in the milliwatt range. The consists four layers polyvinylidene difluoride polymer, bonded to cantilever with tip mass. cantilever’s resonance frequency was measured at 13.4 Hz. are connected parallel, resulting total capacitance 27 nF. At resonance, under open-circuit conditions, generates nearly 90 Vpp when subjected an acceleration 1 g. When impedance is matched, maximum output reaches 2.4...
Over the last few decades, nanoparticles have become a key element in number of scientific and technological fields, spanning from materials science to life sciences. The characterization or samples containing nanoparticles, terms morphology, chemical composition, other parameters, typically involves investigations with various analytical tools, requiring complex workflows extending duration such studies several days even weeks. Here, we report on development new unique situ correlative...
Gallium-doped zinc oxide (GZO) films were fabricated using RF magnetron sputtering and atomic layer deposition (ALD). The latter ones demonstrate higher electrical conductivities (up to 2700 S cm–1) enhanced charge mobilities (18 cm2 V–1 s–1). morphological analysis reveals differences mostly due the very different nature of processes. film deposited via ALD shows an increased transmittance in visible range a small one infrared that leads figure merit 0.009 Ω–1 (10 times than for...
While silver nanowires (Ag NWs) have been demonstrated as a highly efficient transparent conducting material, they suffer from strong light scattering, which is quantified by large haze factor (HF) in the optical spectrum. Here we investigate influence of dielectric environment on scattering Ag NWs comparing experimental measurements and simulations. In air, two peaks HF spectra are observed experimentally at wavelength
The most promising materials to replace indium tin oxide (ITO) in transparent electrodes could be silver nanowires. One of the challenges is, however, large-scale deposition This study provides a solution deposit nanowires on large substrate area by spray deposition. new concept is heated glass vertical position with flat beam instead basic conic beam. After optimization parameters such as cleaning, droplets size, pressure, and distance, surface 100 cm2 was fully covered very good...
A dedicated transmission helium ion microscope (THIM) for sub-50 keV has been constructed to investigate scattering processes and contrast mechanisms, aiding the development of new imaging analysis modalities. Unlike a commercial (HIM), in-house built instrument allows full flexibility in experimental configuration. Here, we report projection intensity patterns obtained from powder bulk crystalline samples using stationary broad-beam as well convergent-beam illumination conditions THIM. The...
Scanning transmission ion microscopy imaging was performed whilst using a delay-line detector to record the impact position and arrival time of transmitted ions or neutrals. The incident helium beam had an energy 20 keV measurements were used calculate loss after through sample. 5D dataset thus produced (2D in sample plane, 2D energy) is analyzed by collection into spectra images. It demonstrated that maps can identify regions identical materials plane. behavior with respect scattering angle...
High operational frequencies of the upcoming 5G network will result in shorter broadcast distances and dead zones. Additional access points signal repeaters embedded into existing infrastructure therefore be needed. We demonstrate an autonomous communication module based on additively manufactured transparent antenna set to operate at 2.4 GHz. The is made inkjet-printed indium tin oxide, with visible light transmittance, electrical conductivity, Haake's figure merit 87%, 1,280 S cm−1, 4.9 ×...
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