A5042138461- Gold and Silver Nanoparticles Synthesis and Applications
- Nanocluster Synthesis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Protein Interaction Studies and Fluorescence Analysis
- Iron oxide chemistry and applications
- Nanoparticles: synthesis and applications
- Environmental remediation with nanomaterials
- Electrochemical Analysis and Applications
- Quantum Dots Synthesis And Properties
- Advanced Nanomaterials in Catalysis
- Advanced oxidation water treatment
- Nanomaterials for catalytic reactions
- Graphene and Nanomaterials Applications
- Arsenic contamination and mitigation
- Nonlinear Optical Materials Studies
- Carbon and Quantum Dots Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Laser-induced spectroscopy and plasma
- Planetary Science and Exploration
- Metal complexes synthesis and properties
- Astro and Planetary Science
- Electrochemical sensors and biosensors
- Nanoparticle-Based Drug Delivery
- Luminescence and Fluorescent Materials
- Graphene research and applications
Palacký University Olomouc
2015-2025
Regional Centre of Advanced Technologies and Materials
2010-2016
Moravská Vysoká Skola Olomouc
2016
Florida Institute of Technology
2013
Genopole (France)
2007-2011
Sorbonne Université
2007-2011
Charles University
2003-2011
Czech Academy of Sciences, Institute of Macromolecular Chemistry
2008-2009
Centre National de la Recherche Scientifique
2008
This study investigated the possible natural formation of silver nanoparticles (AgNPs) in Ag(+)-fulvic acid (FA) solutions under various environmentally relevant conditions (temperature, pH, and UV light). Increase temperature (24-90 °C) pH (6.1-9.0) Ag(+)-Suwannee River fulvic (SRFA) accelerated appearance characteristic surface plasmon resonance (SPR) AgNPs. The rate AgNP via reduction Ag(+) presence different FAs (SRFA, Pahokee Peat acid, PPFA, Nordic lake NLFA) Suwannee humic (SRHA)...
There are several green methods available to synthesize iron-based nanoparticles using different bio-based reducing agents. Although their useful properties in degradation of organic dyes, chlorinated organics, or arsenic have been described earlier, characterization has ambiguous, and further research is needed this area. Synthesis details on produced by tea extract detail; was carried out transmission electron microscopy (TEM), X-ray powder diffraction (XRD), UV–vis spectrometry followed...
We report on new magnetic bimetallic Fe–Ag nanoparticles (NPs) which exhibit significant antibacterial and antifungal activities against a variety of microorganisms including disease causing pathogens, as well prolonged action high efficiency phosphorus removal. The preparation these multifunctional hybrids, based direct reduction silver ions by commercially available zerovalent iron (nZVI) is fast, simple, feasible in large scale with controllable NP content size. microscopic observations...
We report a new procedure, exploiting "green" chemistry, resulting in biocompatible magnetically-driven nanocomposites with high antibacterial and antifungal activities against ten tested bacterial strains four Candida species. The consist of silver nanoparticles (NPs), biogenic magnetite NPs isolated from magnetotactic bacteria, an environmentally friendly polymer – chitosan. These hybrids were prepared using acidified chitosan suspension to cover by cross-linking method, followed employing...
Abstract The reaction of potassium ferrate(VI), K 2 FeO 4 , with weak‐acid dissociable cyanides—namely, [Zn(CN) ], [Cd(CN) [Ni(CN) and 3 [Cu(CN) ]—results in the formation iron(III) oxyhydroxide nanoparticles that differ size, crystal structure, surface area. During cyanide oxidation simultaneous reduction iron(VI), zinc(II), copper(II), cadmium(II), metallic ions are almost completely removed from solution due to their coprecipitation oxyhydroxides including 2‐line ferrihydrite, 7‐line...
This work reports the role of iron redox pair (Fe(3+)/Fe(2+)) in formation naturally occurring silver nanoparticles (AgNPs) aquatic environment. The results showed that Fe(3+) or Fe(2+) ions mixtures Ag(+) and natural organic matter enhanced AgNPs. AgNPs depended on pH types matter. Increase AgNPs, humic acids as ligands higher compared to fulvic acids. observed were described by considering potentials pairs species possible involved reducing Dynamic light scattering transmission electron...
We present a new, easily scalable method for the deposition of nanocrystalline hematite photoelectrodes based on spin-coating mixed solution containing tin(II) and iron(III) chlorides followed by thermal treatment. Our facile approach does not require any additional film-forming organic species allows simple control photoelectrochemical performance electrode adjusting degree tin doping. When annealed at 650 °C strong increase in water oxidation photocurrent is observed with increasing...
Hypothesis: The development of bimodal imaging probes represents a hot topic current research. Herein, we deal with developing an innovative contrast agent enabling fluorescence (FI)/magnetic resonance (MRI) and, simultaneously, consisting biocompatible nanostructures. Optimized synthesis advanced protein-embedded bimetallic (APEBM) nanocomposite containing luminescent gold nanoclusters (AuNC) and superparamagnetic iron oxide nanoparticles (SPION), suitable for in vivo dual-modal FI/MR is...
Nanocomposites serving as dual (bimodal) probes have great potential in the field of bio-imaging. Here, we developed a simple one-pot synthesis for reproducible generation new luminescent and magnetically active bimetallic nanocomposites. The was performed sequential manner obeys principles green chemistry. Briefly, bovine serum albumin (BSA) exploited to uptake Au (III) Fe (II)/Fe ions simultaneously. Then, were transformed nanoclusters embedded BSA (AuNCs-BSA) majority bio-embedded into...
Gold–silver synergism has been well documented in many scientific works dealing with luminescent nanostructures that are exploitable biomedical and environmental application. Frequently, the ratio of Au : Ag synthetic mixtures was varied to influence extent Au–Ag resulting gold–silver nanoclusters (GSNCs). However, our approach, a new step, maturing under differing conditions using same (5 1), investigated systematically for very first time. As referent systems, monometallic gold (AuNCs)...
Liquid-phase exfoliation of graphite is a widely used method to obtain graphene nanosheets, and therefore the development simple efficient procedure remains challenging. Here, we present one-step in lecithin/chloroform solution. The nanosheets produced by lecithin assisted were analyzed microscopy techniques, including statistical analysis atomic force (AFM) images Raman spectroscopy, which both indicate presence few-layer substantial content three-layer sheets. Molecular dynamics...
Fluorescent core–shell nanohybrids with the shells derived from carbon dots and cores differing in chemical nature morphology were synthesized. Hybrid nanoparticles combine fluorescence other functionalities such as magnetic response on a single platform. These hybrids can be used various bioapplications demonstrated labeling of stem cells.
Development of a functional protein-templated nanocomposite containing luminescent Au–Ag nanoclusters and SPION, successfully applied as biocompatible contrast agent in living mice.
This paper presents solid state synthesis and characterization of tetra-oxy iron(iv) iron(v) species in their salt forms (Na4FeO4-Fe(IV) K3FeO4-Fe(V)). Stability the synthesized salts, commonly called ferrates, water was determined by applying (57)Fe Mössbauer spectroscopy technique. Within 2 s water, Fe(IV) converted into Fe(III) while Fe(V) transformed Fe(VI) at pH = 8.2. Comparatively, (bought as K2FeO4) remained stable aqueous solution during short time period. The oxidative removal...
Bovine serum albumin-embedded Au nanoclusters (BSA-AuNCs) are thoroughly probed by continuous wave electron paramagnetic resonance (CW-EPR), light-induced EPR (LEPR), and sequences of microscopic investigations performed via high-resolution transmission microscopy (HR-TEM), scanning (STEM), energy dispersive X-ray analysis (EDS). To the best our knowledge, this is first report analyzing BSA-AuNCs CW-EPR/LEPR technique. Besides presence Au(0) Au(I) oxidation states in BSA-AuNCs, authors...
Zero-valent iron nanoparticles (NZVI) which are frequently investigated for their application potential in pollutants removal can be prepared by several different ways. Here, we report NZVI formation wet chemical synthesis the presence of selected L-amino acids, thus low-molecular weight and biocompatible species. According to our results based mainly, but not only, on Mössbauer spectroscopy (an excellent sensitive method), there distinct differences zero-valent content when each amino acids...
The study presents a systematic kinetics investigation of the decay ferrate(<sc>vi</sc>) in presence inorganic buffering ions (borate, phosphate, and carbonate) at pH range from 6.0 to 9.0.