Příprava a charakterizace nanostruktur
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A Versatile Setup for Fourier-Transform Infrared Magneto-Spectroscopy
(IEEE, 2023-06-09)Fourier-transform infrared (FTIR) magneto-spectroscopy is a powerful spectroscopic technique used to investigate many important effects in materials, e.g., electron spin resonance (ESR), cyclotron resonance, and transitions ... -
Spatio-spectral metrics in electron energy loss spectroscopy as a tool to resolve nearly degenerate plasmon modes in dimer plasmonic antennas
(WALTER DE GRUYTER GMBH, 2023-06-19)Electron energy loss spectroscopy (EELS) is often utilized to characterize localized surface plasmon modes supported by plasmonic antennas. However, the spectral resolution of this technique is only mediocre, and it can ... -
Preserving Metamagnetism in Self-Assembled FeRh Nanomagnets
(AMER CHEMICAL SOC, 2023-02-15)Preparing and exploiting phase-change materials in the nanoscale form is an ongoing challenge for advanced material research. A common lasting obstacle is preserving the desired functionality present in the bulk form. Here, ... -
Plasmonic Properties of Individual Gallium Nanoparticles
(American Chemical Society, 2023-02-16)Gallium is a plasmonic material offering ultraviolet to near-infrared tunability, facile and scalable preparation, and good stability of nanoparticles. In this work, we experimentally demonstrate the link between the shape ... -
Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering
(Springer Nature, 2023-05-09)It is of fundamental interest to probe dynamics excitations such as magnons with nanoscale wavelengths in matter. Here, the authors experimentally observe magnons with high k-vectors using Brillouin light scattering ... -
Correlative Imaging of Individual CsPbBr3 Nanocrystals: Role of Isolated Grains in Photoluminescence of Perovskite Polycrystalline Thin Films
(AMER CHEMICAL SOC, 2023-06-20)We report on the optical properties of a CsPbBr3 polycrystallinethin film on a single grain level. A sample composed of isolated nanocrystals(NCs) mimicking the properties of the polycrystalline thin film grainsthat can ... -
Chiral Nanoparticle Chains on Inorganic Nanotube Templates
(American Chemical Society, 2023-06-30)Fabrication of chiral assemblies of plasmonic nanoparticles isa highly attractive and challenging task, with promising applicationsin light emission, detection, and sensing. So far, primarily organic chiral templates have ... -
Single-Pixel Imaging in Space and Time with Optically Modulated Free Electrons
(American Chemical Society, 2023-04-19)Single-pixel imaging, originally developed in light well as probing with light wavelengths undetectable by conventional multi-pixel detectors. However, the spatial resolution of optics-based single-pixel microscopy is ... -
Electron Tractor Beam: Deterministic Manipulation of Liquid Droplets on Solid Surfaces
(Wiley, 2023-01-17)The motion of liquid droplets is studied across many physics subfields and manipulation of nanoscale droplets on demand holds great promise in, e.g., nanotechnology. In this study, AuGe droplets on a germanium substrate ... -
Coherence-encoded synthetic aperture for super-resolution quantitative phase imaging
(AIP Publishing, 2022-04-01)Quantitative phase imaging (QPI) has quickly established its role in identifying rare events and screening in biomedicine or automated image data analysis using artificial intelligence. These and many other applications ... -
Two-dimensional quantitative near-field phase imaging using square and hexagonal interference devices
(De Gruyter, 2022-08-26)We demonstrate the formation of the near field with non-trivial phase distribution using surface plasmon interference devices, and experimental quantitative imaging of that phase with near-field phase microscopy. The phase ... -
Low temperature 2D GaN growth on Si(111) 7 x 7 assisted by hyperthermal nitrogen ions
(Royal Society of Chemistry, 2022-07-15)As the characteristic dimensions of modern top-down devices are getting smaller, such devices reach their operational limits imposed by quantum mechanics. Thus, two-dimensional (2D) structures appear to be one of the best ... -
Memristors with Initial Low-Resistive State for Efficient Neuromorphic Systems
(Wiley, 2022-03-21)Memristive electronic synapses are attractive to construct artificial neural networks (ANNs) for neuromorphic computing systems, owing to their excellent electronic performance, high integration density, and low cost. ... -
Kinetics of Guided Growth of Horizontal GaN Nanowires on Flat and Faceted Sapphire Surfaces
(MDPI, 2021-03-01)The bottom-up assembly of nanowires facilitates the control of their dimensions, structure, orientation and physical properties. Surface-guided growth of planar nanowires has been shown to enable their assembly and alignment ... -
Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties
(MDPI, 2021-03-01)In this work two approaches to the description of short fatigue crack growth rate under large-scale yielding condition were comprehensively tested: (i) plastic component of the J-integral and (ii) Polak model of crack ... -
The Impact of Vibrational Entropy on the Segregation of Cu to Antiphase Boundaries in Fe3Al
(MDPI, 2021-08-02)We performed a quantum mechanical study of segregation of Cu atoms toward antiphase boundaries (APBs) in Fe3Al. The computed concentration of Cu atoms was 3.125 at %.The APBs have been characterized by a shift of the lattice ... -
Electron beam directed etching of hexagonal boron nitride
(Royal Society of Chemistry, 2016-09-28)Hexagonal boron nitride (hBN) is a wide bandgap van der Waals material with unique optical properties that make it attractive for two dimensional (2D) photonic and optoelectronic devices. However, broad deployment and ... -
Colossal magnetic phase transition asymmetry in mesoscale FeRh stripes
(Springer Nature, 2016-10-11)Coupled order parameters in phase-transition materials can be controlled using various driving forces such as temperature, magnetic and electric field, strain, spin-polarized currents and optical pulses. Tuning the material ... -
Magneto-optical investigations of molecular nanomagnet monolayers
(Royal Society of Chemistry, 2016-04-11)We report field-dependent magnetization measurements on monolayers of [Dy(Pc)2] on quartz, prepared by the Langmuir–Blodgett technique. The films are thoroughly characterized by means of X-ray reflectivity and atomic force ... -
Preparation of (001) preferentially oriented titanium thin films by ion-beam sputtering deposition on thermal silicon dioxide
(Springer US, 2016-04-01)We propose the ion-beam sputtering deposition providing Ti thin films of desired crystallographic orientation and smooth surface morphology not obtainable with conventional deposition techniques such as magnetron sputtering ...
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