A5049200561- ZnO doping and properties
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Thermoelectric Materials and Devices
- Geological and Geochemical Analysis
- Nanoparticles: synthesis and applications
- Mineralogy and Gemology Studies
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Microwave Dielectric Ceramics Synthesis
- Advanced Photocatalysis Techniques
- Bone Tissue Engineering Materials
- Crystal Structures and Properties
- Advanced ceramic materials synthesis
- nanoparticles nucleation surface interactions
- Ga2O3 and related materials
- Multiferroics and related materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
- Magnetic Properties of Alloys
- Calcium Carbonate Crystallization and Inhibition
- Phytochemistry and Bioactivity Studies
Jožef Stefan Institute
2016-2025
Czech Academy of Sciences, Institute of Physics
2022
Czech Academy of Sciences
2022
Centre of Excellence NAMASTE
2011-2013
Jožef Stefan International Postgraduate School
2012
A green synthetic route for the production of silver nanoparticles (AgNPs) using five different aqueous plant extracts, namely, Berberis vulgaris, Brassica nigra, Capsella bursa-pastoris, Lavandula angustifolia and Origanum vulgare, was investigated in this study. The present work demonstrates influence extract composition (antioxidant total phenolic content) on size morphology produced AgNPs. biosynthetic procedure rapid simple easily monitored via colour changes ultraviolet visible...
The influence of different curing temperatures on the hydration belite-calcium sulfoaluminate cement was investigated at 20, 40 and 60 °C. kinetics hydrated phase assemblages were studied by isothermal calorimetry, X-ray powder diffraction, differential thermal analysis thermogravimetric analysis, as well field emission scanning electron microscopy. compressive strength development pastes also determined. Results showed that, early ages, faster higher elevated than ambient temperature. On...
Zinc oxide nanopowders were synthesized by the sol–gel method from an ethanol solution of zinc acetate dihydrate. Detailed structural and microstructural investigations carried out using x-ray diffraction, Raman spectroscopy, thermogravimetric differential thermal analyses, as well high-resolution transmission electron microscopy (TEM) field-emission scanning microscopy. The intermediate compound reaction was layered hydroxide that further transforms into hexagonally shaped ZnO crystalline...
In the present study, a quick and environmentally friendly approach has been developed for synthesis of CuS nanocrystals different shape with antibacterial activity. The process is completed in 5 min. presence copper sulfide final products was confirmed by XRD, Raman spectroscopy, XPS, TEM. morphology product dependent on whether or not reaction providing sulfur realized. When included, particles an elongated thickness range between 6 8 nm lengths up to 60 nm. It found that plays role...
Within this study, a stable nanosuspension of silver nanoparticles (Ag NPs) was prepared using two-step synthesis and stabilization approach. The Ag NPs were synthesized from nitrate solution the Origanum vulgare L. plant extract as reducing agent. formation finished upon 15 min, subsequently, by polyvinylpyrrolidone (PVP) wet stirred media milling applied. UV-Vis spectra have shown maximum at 445 nm, corresponding to spherical NPs. Infrared spectroscopy used examine interaction between...
Low-temperature hydrothermal epitaxial growth and topochemical conversion (TC) reactions offer unexploited possibilities for the morphological engineering of heterostructural non-equilibrium shape (photo)catalyst particles. The SrTiO3 on Bi4Ti3O12 platelets is studied as a new route formation novel nanoheterostructural SrTiO3/Bi4Ti3O12 at an intermediate stage or (100)-oriented mesocrystalline nanoplatelets completed TC reaction. act source Ti(OH)62– species and, same time, substrate SrTiO3....
CdS nanoparticles were successfully synthesized using cadmium acetate and sodium sulfide as Cd S precursors, respectively. The effect of thiosulfate an additional sulfur precursor was also investigated (combined milling). samples characterized by XRD, Raman spectroscopy, XPS, UV-Vis PL DLS, TEM. Photocatalytic activities both compared. photocatalytic activity CdS, which is produced combined milling, superior to that obtained route in the degradation Orange II under visible light irradiation....
Despite being one of the most widely studied metal-free semiconductors, graphitic carbon-nitride (gC3N4) shows meaningful photocatalytic activities only when loaded with noble-metal co-catalysts. The present work reports an alternative to noble metals in form cobalt boride (CoB) co-catalyst that can be easily integrated within gC3N4 framework facile fabrication strategies. optimized CoB-gC3N4 composite showed ∼60 times higher hydrogen generation rate compared bare nanosheets, good stability....
Sm-doped Pb(Mg 1/3 Nb 2/3 )O 3 –30PbTiO relaxor ferroelectric thin films with slush-like structure demonstrate ultra-high energy density, excellent thermal stability and fatigue-free storage properties.
Abstract Flat panel display technology seems to be an ever‐expanding field developing into a multibillion dollar market. A set of technical solutions involve transparent conducting film (TCF) that is today still dominated by indium ‐ tin oxide (ITO). In race find alternatives would avoid the pitfalls, mainly due its increasing price and limited natural availablity, replacement materials have been extensively investigated. This work demonstrates exploiting basic principles crystal growth in...
A completely solid-state mechanochemical synthesis of silver nanoparticles overcoming the problem with water insolubility lichen metabolites hampering their use for classical green in is shown herein. Four species (Xanthoria elegans, Cetraria islandica, Usnea antarctica, and Leptogium puberulum) AgNO3 were used as reducing agents Ag(0) precursor, respectively. The reaction progress was rapid first two cases, whereas case U. antarctica L. puberulum, a significant amount could still be...
This study shows mechanochemical synthesis as an alternative method to the traditional green of silver nanoparticles in a comparative manner by comparing products obtained using both methodologies and different characterization methods. As precursor, most commonly used nitrate was applied easily accessible lavender (Lavandula angustofolia L.) plant reducing agent. Both syntheses were performed 7 lavender:AgNO3 mass ratios. The time limited 8 15 min case synthesis, respectively, although...
Lithium lanthanum titanate (LLTO) perovskite is one of the most promising electrolytes for all-solid-state batteries, but its performance limited by presence grain boundaries (GBs). The fraction GBs can be significantly reduced preparation coarse-grained LLTO ceramics. In this work, we describe an alternative approach to fabrication ceramics with large grains based on self-seeded growth. compositions starting stoichiometry Li0.20La0.60TiO3 phase and a high excess addition Li (Li:La:Ti =...
The atomic structure and the chemistry of basal ‐ plane inversion boundaries in Sb 2 O 3 ‐doped ZnO were investigated using quantitative transmission electron microscopy techniques. Electron microdiffraction high resolution used to determine orientation polar c ‐axis on both sides boundary translation state between inverted domains. Quantitative energy dispersive X ray spectroscopy combined with allowed us exact amount arrangement antimony layer. Inversion are head oriented a displacement...
Abstract The present study demonstrates a scalable approach towards the pure Cu 2 ZnSnS 4 (CZTS) phase starting from microsized Cu, Zn, Sn, and S mixture or combination of nanosized CuS, SnS plus Zn S. A set mechanochemical reactions was carried out in an industrial vibratory mill. CZTS obtained after 360 minutes milling with average crystallite size 15 nm for both mixtures. kinetics formation investigated following X‐ray diffractometry (XRD) patterns reaction mixtures milled various times....