A5068880596- Carbon and Quantum Dots Applications
- Nanocluster Synthesis and Applications
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Electrochemical sensors and biosensors
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Graphene research and applications
- Copper-based nanomaterials and applications
- Luminescence and Fluorescent Materials
- Graphene and Nanomaterials Applications
- Magnetic and Electromagnetic Effects
- 2D Materials and Applications
- Advanced Nanomaterials in Catalysis
- Chemical and Physical Studies
- Plant and Biological Electrophysiology Studies
- Photochemistry and Electron Transfer Studies
- Advanced biosensing and bioanalysis techniques
- Additive Manufacturing and 3D Printing Technologies
- TiO2 Photocatalysis and Solar Cells
- Bacterial biofilms and quorum sensing
- Advanced battery technologies research
- Surface Roughness and Optical Measurements
- Air Quality Monitoring and Forecasting
- Metal-Organic Frameworks: Synthesis and Applications
Regional Centre of Advanced Technologies and Materials
2020-2025
Palacký University Olomouc
2020-2025
VSB - Technical University of Ostrava
2024-2025
Brno University of Technology
2018-2024
Friedrich-Alexander-Universität Erlangen-Nürnberg
2021-2023
Center for Economic Research and Graduate Education – Economics Institute
2023
Laboratoire National des Champs Magnétiques Intenses
2020
Université Grenoble Alpes
2020
Centre National de la Recherche Scientifique
2020
Moravská Vysoká Skola Olomouc
2020
Luminescent solar concentrators (LSCs) are light-management devices and used for harvesting concentrating light from a large area to their edges. Being semitransparent devices, LSCs show great promise future utilization in glass walls of urban buildings as environmentally friendly photovoltaic power plants. The development cheap eco-safe materials, the extension LSC operation range, enhancement optical efficiency key challenges, which need be solved order transform energetically passive into...
This paper deals with the measurement of low values electrical voltages and currents from sources high internal resistance.The measured are close to theoretical limits achievable sensitivity, which determined by magnitude Johnson´s thermal noise.Non-thermal noises also generated in circuit.The most significant noise after is flicker a frequency dependence 1/f.Choosing an accurate operational amplifier input bias just as important choosing precise passive components noise.
Artificial photosynthesis is seen as a path to convert and store solar energy into chemical for our society. In this work, highly fluorescent aspartic acid-based carbon dots (CDs) are synthesized employed photosensitizer drive photocatalytic hydrogen evolution with an [FeFe] hydrogenase (CrHydA1). The direct interaction in CDs from l-aspartic acid (AspCDs)/CrHydA1 self-assembly systems, which visualized native gel electrophoresis, has been systematically investigated understand the...
Highly fluorescent carbon nanoparticles called dots (CDs) have been the focus of intense research due to their simple chemical synthesis, nontoxic nature, and broad application potential including optoelectronics, photocatalysis, biomedicine, energy-related technologies. Although a detailed elucidation mechanism photoluminescence (PL) remains an unmet challenge, CDs exhibit robust, reproducible, environment-sensitive PL signals, enabling us monitor selected phenomena phase transitions or...
In this work, we achieved the synthesis of purple-emissive carbon dots (p-CDs) by a simple and highly reproducible route using folic acid as sole precursor. The emission p-CDs is located around 390 nm, independent excitation wavelength with high photoluminescence quantum yield 54.6%, thus complementing an color palette brightly emitting purple. CDs are stable in both colloidal state polymer films. A dot luminescence down-shifting layer used to sensitize Si photodetector UV range. As example,...
Doping and compositional tuning of Cs2AInCl6 (A = Ag, Na) double perovskite nanocrystals (PNCs) is considered a promising strategy toward the development light-emitting sources for applications in solution-processed optoelectronic devices. Oleic acid oleylamine are by far most often used surface capping ligands PNCs. However, undesirable desorption these due to proton-exchange reaction during isolation purification processing results colloidal structural instabilities. Thus, improvement...
Luminescent solar concentrators (LSCs) are light-harvesting devices that redirect light to an edge-attached photovoltaic cell, and thus, they have high potential be incorporated directly into buildings' windows allow for generating electricity. Perovskite nanocrystals (PNCs) promising materials LSCs because their enticing optical properties can engineered provide a photoluminescence (PL) quantum yield (QY) low overlap between absorption emission spectra. Replacement of toxic, lead-containing...
The establishment of structure-photoluminescence (PL) relationships remains an ultimate challenge in the field carbon dots (CDs).
Abstract In this report, a 2D MOF nanosheet derived Pd single‐atom catalyst, denoted as Pd‐MOF, was fabricated and examined for visible light photocatalytic hydrogen evolution reaction (HER). This Pd‐MOF can provide remarkable activity (a H 2 production rate of 21.3 mmol/gh in the range), which outperforms recently reported Pt‐MOFs (with 6.6 mmol/gh) with similar noble metal loading. Notably, high efficiency is not due to different chemical environment center, nor by changes spectral...
Owing to their extraordinary photophysical properties, carbon dots (CDs) have found applications across various fields, including bioimaging, sensing, and environmental research. Despite a huge application potential, fabrication of CDs still...
Abstract Photoactivation of aspartic acid‐based carbon dots (Asp‐CDs) induces the generation spin‐separated species, including electron/hole (e − /h + ) polarons and spin‐coupled triplet states, as uniquely confirmed by light‐induced electron paramagnetic resonance spectroscopy. The relative population e pairs species depends on solvent polarity, featuring a substantial stabilization state in non‐polar environment (benzene). electronic properties photoexcited Asp‐CDs emerge from their...
We perform coherent nonlinear spectroscopy of excitons in single-layers MoSe$_2$ and WSe$_2$ encapsulated between thin films hexagonal boron nitride. Employing four-wave mixing microscopy we identify virtually disorder free areas, generating exciton optical response at the homogeneous limit. Focussing on such measure broadening as a function environmental factors, namely temperature density. Exploiting FWM imaging, find that locations, absorption excited states their couplings can be...
The outbreak of antibiotic-resistant bacteria, or "superbugs", poses a global public health hazard due to their resilience against the most effective last-line antibiotics. Identifying potent antibacterial agents capable evading bacterial resistance mechanisms represents ultimate defense strategy. This study shows that -the otherwise essential micronutrient- manganese turns into broad-spectrum antibiotic when coordinated with carboxylated nitrogen-doped graphene. material (termed NGA-Mn) not...
Abstract Access to clean water for drinking, sanitation, and irrigation is a major sustainable development goal of the United Nations. Thus, technologies cleaning quality‐monitoring must become widely accessible low‐cost, while being effective, selective, sustainable, eco‐friendly. To meet this challenge, hetero‐bifunctional nanographene fluorescent beacons with high‐affinity pockets heavy metals are developed, offering top‐rated selective adsorption cadmium lead, reaching 870 450 mg g ‐1 ,...
Integrating thiocubane's redox chemistry with a highly functionalized graphene boosts the energy and power density in an ionic liquid-electrolyte supercapacitor.
Abstract Herein we report a one‐step, low cost, photocatalytic method for the synthesis of graphene oxide (GO) from commercial graphite using grey TiO 2 as photocatalyst. GO formation is achieved by UV‐illumination slurry well‐dispersed and graphite. Light‐induced valence‐band holes then lead to an oxidation exfoliation graphite, resulting in visible‐light‐active GO. An optimal level can be established controlling UV illumination time. Moreover, GO‐decorated directly active photocatalyst...
The surface of Carbon Nanodots (CNDs) stands as a rich chemical platform, able to regulate the interactions between particles and external species. Performing selective functionalization these nanoscale entities is practical importance, however, it still represents considerable challenge. In this work, we exploited organic chemistry toolbox install target functionalities on CND surface, while monitoring changes material's outer shell through nuclear magnetic resonance spectroscopy. Following...
Abstract One of the UN Sustainable Development Goals is to ensure universal access clean drinking water. Among various types water contaminants, mercury (Hg) considered be one most dangerous ones. It mostly its immense toxicity and vast environmental impact that stand out. To tackle issue monitoring quality, a nanosensor based on carbon dots (CDs) developed, whose surface functionalized with carboxylic groups. CDs show Hg 2+ concentration‐dependent photoluminescence (PL) lifetimes along an...
Abstract In this report, a 2D MOF nanosheet derived Pd single‐atom catalyst, denoted as Pd‐MOF, was fabricated and examined for visible light photocatalytic hydrogen evolution reaction (HER). This Pd‐MOF can provide remarkable activity (a H 2 production rate of 21.3 mmol/gh in the range), which outperforms recently reported Pt‐MOFs (with 6.6 mmol/gh) with similar noble metal loading. Notably, high efficiency is not due to different chemical environment center, nor by changes spectral...
Abstract In recent years, the defect engineering of titania via reduction treatments has shown a high potential for enabling efficient and co-catalyst-free photocatalytic H 2 generation from methanol/water solutions. However, simultaneously alters several properties TiO . Here, we use pristine (white) hydrogenated (gray) anatase nanosheets with dominant (001) facets. By comparing electrical conductivity, photocurrent spectra, transient response, evolution, show that increased conductivity or...