A5006202908- Metamaterials and Metasurfaces Applications
- ZnO doping and properties
- Advanced Antenna and Metasurface Technologies
- Plasmonic and Surface Plasmon Research
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Thermal Radiation and Cooling Technologies
- Antenna Design and Analysis
- Electromagnetic wave absorption materials
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- solar cell performance optimization
- Additive Manufacturing and 3D Printing Technologies
- Graphene research and applications
- Terahertz technology and applications
- Ga2O3 and related materials
- Photonic Crystals and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Transition Metal Oxide Nanomaterials
- Surface Modification and Superhydrophobicity
- Microplastics and Plastic Pollution
- Solar Thermal and Photovoltaic Systems
- Advancements in Battery Materials
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
Foundation for Research and Technology Hellas
2016-2025
FORTH Institute of Electronic Structure and Laser
2017-2023
Hellenic Mediterranean University
2008-2019
Hella (Germany)
2019
University Hospital of Heraklion
2019
Université d'Angers
2019
College Track
2019
University of Crete
2006-2011
We present an experimental demonstration and interpretation of ultrafast optically tunable, graphene-based thin film absorption modulator for operation in the THz regime. The component consists a uniform CVD-grown graphene sheet stacked on SU-8 dielectric substrate that is grounded by metallic ground plate. structure shows enhanced originating from constructive interference impinging reflected waves at absorbing sheet. modulation this absorption, which demonstrated via time-domain...
A novel three-dimensional (3D) metallic metamaterial structure with asymmetric transmission for linear polarization is demonstrated in the infrared spectral region. The was fabricated by direct laser writing and selective electroless silver coating, a straightforward, technique producing mechanically chemically stable 3D photonic structures. unit cell composed of pair conductively coupled magnetic resonators, response results from interplay electric responses; this equips almost total...
Here, a single-step, biomimetic approach for the realization of omnidirectional transparent antireflective glass is reported. In particular, it shown that circularly polarized ultrashort laser pulses produce self-organized nanopillar structures on fused silica (SiO2 ). The laser-induced nanostructures are selectively textured surface in order to mimic spatial randomness, pillar-like morphology, as well remarkable antireflection properties found wings glasswing butterfly, Greta oto, and...
The outburst of plastic pollution in terrestrial ecosystems poses a potential threat to agriculture and food safety. Studies have already provided evidence for the uptake microparticles by several plant species, accompanied numerous developmental effects, using fluorescence labelling techniques. Here, we introduce implementation confocal Raman spectroscopy, label-free method, effective detection microplastics (MPs) accumulation roots common edible root vegetable plant, Raphanus sativus,...
Five different chiral metamaterials in the terahertz (THz) regime, fabricated on fully flexible polyimide substrates, are comparatively studied via numerical calculations and experimental measurements. The properties of these metamaterials, which discussed based their optical activity, circular dichroism, retrieved effective parameters, show pronounced pure activity (larger than 300°/wavelength), as well important polarization generation filtering capabilities. Negative refractive index is...
Switchable and tunable chiral metamaterial response is numerically demonstrated here in different uniaxial structures operating the THz regime. The are based on bi-layer conductor design tunable/switchable achieved by replacing parts of metallic components photoconducting Si, which can be transformed from an insulating to almost conducting state through photoexcitation, achievable under external optical pumping. All proposed discussed exhibit frequency regions with giant circular dichroism,...
The radiative cooling of objects during daytime under direct sunlight has recently been shown to be significantly enhanced by utilizing nanophotonic coatings. Multilayer thin film stacks, 2D photonic crystals, etc. as coating structures improved the thermal emission rate a device in infrared atmospheric transparency window reducing considerably devices' temperature. Due increased heating photovoltaic (PV) devices - that significant adverse consequences on both their efficiency and life-time...
In order to expand the mechanical and physical capabilities of 3D-printed structures fabricated via commercially available 3D printers, nanocomposite microcomposite filaments were produced melt extrusion, evaluated. The scope this work is fabricate physically mechanically improved nanocomposites or microcomposites for direct commercial industrial implementation while enriching existing literature with methodology applied. Zinc Oxide nanoparticles (ZnO nano) micro-sized particles micro)...
Abstract Outdoor devices comprising materials with mid-IR emissions at the atmospheric window (8–13 μm) achieve passive heat dissipation to outer space (~ − 270 °C), besides atmosphere, being suitable for cooling applications. Recent studies have shown that micro-scale photonic patterning of such further enhances their spectral emissivity. This approach is crucial, especially daytime operation, where solar radiation often increases device load. However, sub-optimal other wavelengths 8–13 μm,...
Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) copper (CuO) nanoparticles with 1% 3% fillers (i.e., PEO–CuO–MWCNT: 1%, 3%) were successfully developed through electrospinning humidity applications. The characterized by FTIR, XRD, SEM EDX analysis. Firstly, they loaded on an interdigitated electrode...
Solar cell technology requires materials that are efficient, lightweight, and stable. Organic–inorganic lead halide perovskite- polymer-based bulk heterojunction solar cells have emerged as highly promising, ultralightweight, flexible, efficient power sources. However, they suffer from limited stability, which is significantly affected by the temperature, in addition to other factors like oxidization moisture absence of appropriate encapsulation. Here, performing a coupled...
In this study, oxidative desulfurization (ODS) of modeled and real oil samples was investigated using manganese-dioxide-supported, magnetic-reduced graphene oxide nanocomposite (MnO2/MrGO) as a catalyst in the presence an H2O2/HCOOH oxidation system. MnO2/MrGO composite synthesized characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR), diffraction (XRD) analyses. The optimal conditions for maximum removal...
This work presents the development of novel gypsum board composites for advanced thermal energy storage (TES) and electromagnetic interference (EMI) shielding applications. Activated carbon (AC) derived from spent coffee with a high surface area (SBET = 1372 m2/g) was used as shape stabilizer, while commercial paraffin, RT18HC, organic encapsulant phase change material (PCM). The AC showed remarkable encapsulation efficiency stabilizer PCM, ~120.9 wt% (RT18HC), melting enthalpy (ΔHm)...
Abstract This study introduces an approach, termed film‐based multi‐photon lithography (MPL), for the efficient fabrication of electromagnetic surface structures. Unlike conventional MPL, which utilizes droplet‐shaped photosensitive volumes 3D structures, this method employs thin films to minimize influence axial voxel dimensions. modification enables rapid printing 2D structures over large areas with dry objective lenses, achieving feature sizes as small 250 nm. The versatility MPL is...