A5048634019- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Analytical Chemistry and Sensors
- Conducting polymers and applications
- Molecular spectroscopy and chirality
- Speech Recognition and Synthesis
- Spectroscopy and Chemometric Analyses
- Electrochemical sensors and biosensors
- Speech and Audio Processing
- Spectroscopy and Quantum Chemical Studies
- Polyoxometalates: Synthesis and Applications
- Catalysis and Oxidation Reactions
- Crystallization and Solubility Studies
- Music and Audio Processing
- Protein Interaction Studies and Fluorescence Analysis
- Molecular Sensors and Ion Detection
- Analytical Chemistry and Chromatography
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- X-ray Diffraction in Crystallography
- Transition Metal Oxide Nanomaterials
- Nanocluster Synthesis and Applications
- Molecular Junctions and Nanostructures
- Quantum Dots Synthesis And Properties
- Polymer Surface Interaction Studies
University of Chemistry and Technology, Prague
2015-2024
Brno University of Technology
2006-2018
Phonexia (Czechia)
2018
Institute of Chemical Technology
1999-2014
Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry
2003-2009
University of Wyoming
2009
Comenius University Bratislava
2005
Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement
1997-1998
Sorbonne Université
1998
Centre National de la Recherche Scientifique
1997-1998
Silicon nanocrystals are an extensively studied light-emitting material due to their inherent biocompatibility and compatibility with silicon-based technology. Although they might seem fall behind rival, namely, direct band gap based semiconductor nanocrystals, when it comes the emission of light, room for improvement still lies in exploitation various surface passivations. In this paper, we report on original way, taking place at temperature ambient pressure, replace silicon oxide shell...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, several feature extraction and channel compensation techniques found in state-of-the-art speaker verification systems are analyzed discussed. For the NIST SRE 2006 submission, cepstral mean subtraction, warping, RelAtive SpecTrAl (RASTA) filtering, heteroscedastic linear discriminant analysis (HLDA), mapping, eigenchannel adaptation were incrementally added to minimize system's...
In this report, we describe the submission of Brno University Technology (BUT) team to VoxCeleb Speaker Recognition Challenge (VoxSRC) 2019. We also provide a brief analysis different systems on VoxCeleb-1 test sets. Submitted for both Fixed and Open conditions are fusion 4 Convolutional Neural Network (CNN) topologies. The first second networks have ResNet34 topology use two-dimensional CNNs. last two one-dimensional CNN based x-vector extraction topology. Some fine-tuned using additive...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe role of triton X-100 as an adsorbate and a molecular spacer on the surface silver colloid: surface-enhanced Raman scattering studyPavel Matejka, Blanka Vlckova, Jiri Vohlidal, Petr Pancoska, Vladimir BaumrukCite this: J. Phys. Chem. 1992, 96, 3, 1361–1366Publication Date (Print):February 1, 1992Publication History Published online1 May 2002Published inissue 1 February...
Abstract Application of the finite impulse response (FIR) filtration technique for removal spectral noise and background broadband deformations from Raman spectra is tested. Optimal parameters FIR filters are found their effectiveness compared with Savitzky–Golay (SG) smoothing procedure. The to be an effective procedure treat whole spectra, but high computing power needed. Copyright © 2007 John Wiley & Sons, Ltd.
Abstract Surface‐enhanced Raman scattering (SERS) spectroscopy is an analytical method for the detection of low amounts analytes adsorbed on appropriate coinage metal (Au, Ag, Cu) surface. Generally, values enhancement factor are highest silver, lower gold and relatively very copper. In this study, we have focused estimation factors copper surface/substrates formed by different preparation procedures. The SERS activity large electrochemically prepared substrates colloidal systems compared....
Abstract Herein we demonstrate the synthesis of a helicene‐based imidazolium salt. The salt was prepared by starting from racemic 2‐methyl[6]helicene, which undergoes radical bromination to yield 2‐(bromomethyl)[6]helicene. Subsequent treatment with 1‐butylimidazole leads corresponding 1‐butyl‐3‐(2‐methyl[6]helicenyl)‐imidazolium bromide. subsequently characterized using NMR spectroscopy and X‐ray analysis, various optical spectrometric techniques, computational chemistry tools. Finally,...
This study focuses on investigating the laser-induced reactions of various surface complexes 4-aminobenzenethiol Ag, Au, and Cu surfaces. By utilizing different excitation wavelengths, distinct behavior molecule species plasmonic substrates was observed. Density functional theory (DFT) calculations were employed to establish significant role chemical enhancement mechanisms in determining observed behavior. The interaction between (4-ABT) molecules surfaces led formation with absorption bands...
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This paper presents the language identification (LID) system developed in Speech@FIT group at Brno University of Technology (BUT) for NIST 2005 Language Recognition Evaluation. The consists two parts: phonotactic and acoustic. Phonotactic is based on hybrid phoneme recognizers trained SpeechDat-E database. Phoneme lattices are used to train test models. Further improvement obtained by using anti-models. Acoustic GMM modeling under maximum mutual information framework. We describe both parts...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-enhanced resonance Raman spectra of free base 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin and its silver complex in systems with colloid: direct adsorption comparison to via molecular spacerBlanka Vlckova, Pavel Matejka, Jindriska Simonova, Katerina Cermakova, Petr Pancoska, Vladimir BaumrukCite this: J. Phys. Chem. 1993, 97, 38, 9719–9729Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published...
The aromatic mercapto derivative 4-aminobenzenethiol (4-ABT) is a substance that can be easily adsorbed on Au, Ag, and Cu surfaces, but in some studies, formation of 4,4′-dimercaptoazobenzene (4,4′-DMAB) Ag Au described. We have studied 4-ABT all three SERS-active metals spectroelectrochemical cell aiming at the role metal electrode potential 4,4′-DMAB 785-nm excitation. In case intense bands are observed range from +0.2 to −0.8 V. Only very negative potentials do these almost disappear only...