A5067733412- Electrochemical sensors and biosensors
- Molecular Junctions and Nanostructures
- Advanced biosensing and bioanalysis techniques
- Photoreceptor and optogenetics research
- Shape Memory Alloy Transformations
- Surface and Thin Film Phenomena
- Slime Mold and Myxomycetes Research
- Electrochemical Analysis and Applications
- Magnetic and Electromagnetic Effects
- Gas Sensing Nanomaterials and Sensors
- Photonic and Optical Devices
- Quantum-Dot Cellular Automata
- Surface Roughness and Optical Measurements
- Copper Interconnects and Reliability
- Heusler alloys: electronic and magnetic properties
- Neuroscience and Neural Engineering
- Metal and Thin Film Mechanics
- Lipid Membrane Structure and Behavior
- Innovative Microfluidic and Catalytic Techniques Innovation
- Gold and Silver Nanoparticles Synthesis and Applications
- Microfluidic and Capillary Electrophoresis Applications
Clarkson University
2017-2019
Taras Shevchenko National University of Kyiv
2004-2012
Abstract Biocatalytic cascades involving more than one or two enzyme‐catalyzed step are inefficient inside alginate hydrogel prepared on an electrode surface. The problem originates from slow diffusion of intermediate products through the enzyme to another. However, activity can be improved by surface immobilization. We demonstrate that a complex cascade four consecutive biocatalytic reactions designed, with enzymes immobilized in LBL‐assembled polymeric layer at alginate‐modified product,...
Magnetic nanoparticles (MNPs) functionalized with various enzymes (amyloglucosidase, glucose oxidase and horseradish peroxidase) were used to perform biocatalytic cascades in two different states, solute suspension or aggregated, produced the absence presence of an external magnetic field. The reactions proceeded through bulk solution diffusion intermediate substrates substrate channeling, when systems dispersed respectively. both pathways have shown very similar kinetics, unless was...
We report an experimental realization of a biochemical XOR gate function that avoids many the pitfalls earlier realizations based on biocatalytic cascades. Inputs-represented by pairs chemicals-cross-react to largely cancel out when both are nearly equal. The cross-reaction can be designed also optimize functioning for noise handling. When not equal, residual inputs further processed result in output type, steps allow gate-function optimization. quality realized is theoretically analyzed.
Abstract An enzyme‐based XOR logic gate was realized at interface of an alginate‐modified electrode. The biocatalytic production H 2 O inside the alginate film controlled by logically processed input signals. in situ generated decomposed to yield free radicals a Fenton‐type reaction catalyzed iron cations, which were present as cross‐linkers stabilizing hydrogel. produced (•OH, •OOH) resulted decomposition/dissolution removing it from electrode surface and stimulating release process...
The studied enzyme-based biocatalytic system mimics NXOR Boolean logic gate, which is a logical operator that corresponds to equality in algebra. It gives the functional value true (1) if both arguments (input signals) have same (0,0 or 1,1), and false (0) they are different (0,1 1,0). output signal producing reaction catalyzed by pyrroloquinoline quinone-dependent glucose dehydrogenase (PQQ-GDH), inhibited at acidic basic pH values. Two other reactions esterase urease produce acetic acid...
Optical properties of flawless bulk copper sample has been studied based on spectroellipsometry measurements in wide spectral interval (hv=0.18-4.87 eV) at various angles light incidence. The main characteristics electronic subsystem this metal and values energy intervals a band structure were determined for both oxidized unoxidized sample.
Adaptive materials integrate actuating and sensing into a structural material. The development of polymer composites with embedded shape memory alloys can open new perspectives respect to the engineering structures adaptive shape, stiffness, damping other properties. these advanced alloy wires is still in an embryonic stage. Given ellipsometry measurements optical properties copper based which require further research before be used industrial applications.
Electron structure of copper alloys with 3d transition metals (Fe, Co and Cr) have been studied basing on elliposometrical measurement ∆ Ψ in wide spectral range hν = 1.04.95 eV.Spectral dependences Cu-Cr optical conductivity chrome concentration (C 2.530 at.%) minutely analyzed this work.Ascertainment that spectrums (and for other transitive metals) were observed basic band pure Cu, addition supplementary 1-2 eV too.Is shown at small Cr concentrations < 5 alloy is forming a single similar...