A5032380412- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Metal and Thin Film Mechanics
- Electrocatalysts for Energy Conversion
- Microbial Fuel Cells and Bioremediation
- Diamond and Carbon-based Materials Research
- Molecular Communication and Nanonetworks
- Advanced Nanomaterials in Catalysis
- Photoreceptor and optogenetics research
- Dye analysis and toxicity
- Porphyrin Metabolism and Disorders
- Titanium Alloys Microstructure and Properties
- Molecular Junctions and Nanostructures
- Antioxidant Activity and Oxidative Stress
- Biotin and Related Studies
- Free Radicals and Antioxidants
- Metalloenzymes and iron-sulfur proteins
- Nanomaterials for catalytic reactions
- Biosensors and Analytical Detection
- Molecular Sensors and Ion Detection
- Analytical chemistry methods development
- Advanced Chemical Sensor Technologies
Plovdiv University
2012-2025
Medical University Plovdiv
2024
National Academy of Medical Sciences of Ukraine
2024
Ruhr University Bochum
2009-2013
Prof. Assen Zlatarov University
2010
Lund University
2004
Institute of Electrochemistry and Energy Systems
1992
Bulgarian Academy of Sciences
1992
Abstract The electrochemistry of the ligninolytic redox enzymes, which include lignin peroxidase, manganese peroxidase and laccase possibly also cellobiose dehydrogenase, is reviewed discussed in conjunction with their basic biochemical characteristics. It shown that long‐range electron transfer between these enzymes electrodes can be established ability to degrade through a direct mechanism discussed.
Abstract A membrane‐free biofuel cell (BFC) is reported based on enzymes wired to graphite electrodes by means of Os‐complex modified redox polymers. For the anode cellobiose dehydrogenase (CDH) used as a biocatalyst whereas for cathode laccase was applied. This high‐potential and hence able reduce O 2 H at formal potential higher than +500 mV versus Ag/AgCl. In order establish efficient electrochemical contact between electrodeposition polymers containing with specifically designed monomer...
Improved electrocatalytic activity and selectivity for the reduction of H2O2 were obtained by electrodepositing Pd-Pt Pd-Au on spectrographic graphite from solutions containing salts two metals at varying ratio. The resulting binary codeposits was evaluated means redox-competition mode scanning electrochemical microscopy (SECM) voltammetric methods. In a potential range 0 to -600 mV (vs. Ag/AgCl/3 M KCl) pH 7.0 in 0.1 phosphate citrate buffer, both substantially improved as compared with...
Lipid peroxidation is a major process that determines the quality of various oil samples during their use and storage, in which primary products are hydroperoxides (HP’S). HP’S very stable compounds at ambient conditions harmful to human health. Therefore, evaluation degree oxidation an excellent tool for ensuring food safety. The peroxide value (PV) main parameter used control oils. Herein, we propose alternative electrochemical method classical iodometric titration most widely determining...
Engineering electrode surfaces through the electrodeposition of gold may provide a range advantages in context biosensor development, such as greatly enhanced surface area, improved conductivity and versatile functionalization. In this work we report on development an electrochemical for laccase-catalyzed assay two catecholamines-dopamine L-epinephrine. Variety techniques-cyclic voltammetry, differential pulse impedance spectroscopy constant potential amperometry have been used its...
Pd-Au codeposits with different ratio of both metals were electrodeposited on carbon felt, characterized by scanning electron microscopy, and investigated as electrocatalysts towards hydrogen evolution reaction in neutral phosphate buffer solution. The quantities the produced gas electrocatalysts, estimated from data obtained chronoamperometry, confirmed mass spectrometry analysis. highest rate was achieved electrolyte equal Pd Au content.
Abstract The immobilisation of AChE enzyme through chemisorption on Au-modified graphite was examined with view its prospective application in the design membraneless electrochemical biosensors for assay inhibitors. developed protocol has been based a two-stage procedure, comprising i) electrodeposition gold nanostructures spectroscopic graphite; followed by ii) onto nanoparticles. Both coverage electrode surface Au and conditions were optimised. proposed architecture together specific type...
A xanthine oxidase enzyme electrode (xanthine immobilized on electrochemically modified graphite and conveniently coated with gelatine working surface) for quantitative analysis of is proposed. The detection thus developed electrochemical system based the electroreduction hydrogen peroxide generated in layer offered l-ascorbic uric acid reducing interference effect substrate determination. At a potential −50 mV (vs. Ag/AgCl) limit 4.5 μm linearity amperometric signal up to concentration...
Abstract A mesoporous graphite material micro-structured with palladium-platinum deposits (mixed in the ratio of 70:30% Pd:Pt) has been used as a cost-effective electrode for designing an amperometric biosensor xanthine. The here reported shows significantly improved operational parameters compared to previously published results. At constant applied potential −0.05 V (vs. Ag/AgCl) it is distinguished enhanced selectivity determination: at working current from electrochemical transformation...
In this study, we present the results of effect duplex surface modification 304-L stainless steel substrates by an electron-beam treatment (EBT) and subsequent deposition diamond-like carbon coatings on roughness corrosion behavior. During EBT process, beam power was varied from 1000 to 1500 W. The successful DLC confirmed FTIR Raman spectroscopy experiments. showed a presence C–O, C=N, graphite-like sp2, mixed sp2-sp3 C–C bond vibrations. topography studied atomic force microscopy. rise in...
Glucose oxidase (E. C. 1.1.3.4) was immobilized on electrochemically modified graphite to obtain an enzyme electrode. The working surface of the electrode coated with gelatine prevent desorption enzyme. In substrate (glucose) solutions amperometric signal due electroreduction H 2 O generated in layer. linearity response found up a concentration 300 μᴍ at potential 0 mV (vs. Ag/AgCl). It shown that did not respond l-ascorbic and uric acid potential. time about min. keeps 50% its initial...
Following our previous studies on the catalytic activity electrochemically codeposited graphite Pd-Pt electrocatalysts for hydrogen peroxide electroreduction, a series of glassy carbon electrodes were modified with Pd or (Pd+Au) deposits aiming at development even more efficient same process. The resulting found to be very effective low applied potentials (<mml:math...