A5064745255- Nanopore and Nanochannel Transport Studies
- Ion-surface interactions and analysis
- Fuel Cells and Related Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Membrane-based Ion Separation Techniques
- Analytical Chemistry and Sensors
- Membrane Separation Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Anodic Oxide Films and Nanostructures
- Nuclear Physics and Applications
- Advanced biosensing and bioanalysis techniques
- Electrochemical Analysis and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Conducting polymers and applications
- Extraction and Separation Processes
- Chemical Synthesis and Characterization
- Surface Modification and Superhydrophobicity
- Photosynthetic Processes and Mechanisms
- Plant responses to elevated CO2
- Particle accelerators and beam dynamics
- Semiconductor materials and devices
- Diamond and Carbon-based Materials Research
- Electrostatics and Colloid Interactions
- Advancements in Battery Materials
- Health and Medical Studies
Joint Institute for Nuclear Research
2015-2024
Institute for Nuclear Research
2001-2024
Dubna State University
2012-2024
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
1989-2024
Moscow Engineering Physics Institute
2021
Belarusian State University
2017
Environment Agency Austria
2017
International University
2008-2014
Moscow State Pedagogical University
2012
Catalyse
2012
The great potential of nanoporous membranes for water filtration and chemical separation has been challenged by the trade-off between selectivity permeability. Here we report on polymer with an excellent balance permeability ions. Our are fabricated irradiating 2-μm-thick polyethylene terephthalate Lumirror® films GeV heavy ions followed ultraviolet exposure. These show a high transport rate K+ up to 14 mol h-1 m-2 alkali metal over >500. Combining experiments molecular dynamics simulations...
Novel transport phenomena through nanopores are expected to emerge as their diameters approach subnanometer scales. However, it has been challenging explore such a regime experimentally. Here, this study reports on polymer pores exhibiting unique selective ionic transport. 12 μm long, parallel oriented fabricated in polyethylene terephthalate (PET) films by irradiation with GeV heavy ions and subsequent 3 h exposure UV radiation. These show selectivity spanning more than 6 orders of...
We have fabricated a voltage sensor in the form of conically shaped nanopore polyethylene terephthalate (PET) foil. The pore is produced by irradiation foil with single heavy ion and subsequent etching alkaline solution. resulting functions as gate rectifies current due to changes its diameter an electrical field. Ion currents through show voltage-dependent fluctuations, whose kinetics are similar voltage-gated biological channels pores.
We present a complete theoretical study of the relationship between structure (tip shape and dimensions) function (selectivity rectification) asymmetric nanopores on basis previous experimental studies. The model uses continuum approach based Nernst-Planck equations. According to our results, nanopore transport properties, such as current-voltage (I-V) characteristics, conductance, rectification ratio, selectivity, are dictated mainly by pore tip (we have distinguished bullet-like, conical,...
Single- and multiple-nanopore membranes are both highly interesting for biosensing separation processes, as well their ability to mimic biological membranes. The density of pores, shape, surface chemistry the key factors that determine membrane transport capabilities. Here, we report silicon nitride (SiN) with fully controlled porosity, pore geometry, chemistry. An ultrathin freestanding SiN platform is described conical or double-conical nanopores diameters small several nanometers,...
We present the results of systematic studies ion current rectification performed on artificial asymmetric nanopores with different geometries and dimensions. The are fabricated by track etching method using surfactant-doped alkaline solutions. By varying alkali concentration in etchant time, control over pore profile dimensions is achieved. geometry characterized detail field-emission scanning electron microscopy. dependence ratio length, tip diameter, degree taper analysed. experimental...
We present a surfactant-controlled etching method which allows the production of asymmetric track-etched nanopore membranes with diode-like ionic conductivity. The asymmetry pores is provided by self-assembly amphiphilic molecules at pore entrances on one side membrane during chemical while this process excluded other side. By varying alkali concentration in etchant, control over profile achieved. geometry characterized detail using field-emission scanning electron microscopy. equally...
This brief overview demonstrates how the ion track-based technology for micro-structuring polymeric materials that has been practised decades is shifting to nanometre scale in research and development applications. We present selected results of studies have focused on new nanoporous materials, especially membranes, performed recently at Flerov Laboratory Nuclear Reactions, Joint Institute Research (JINR).
We reconstruct the profile of asymmetric ion track nanopores from an algorithm developed for conductometric measurements symmetric nanopores. The validity reconstruction is supported by FESEM observations. Our analysis reveals that pores fabricated one-sided etching are funnel-like and not conical. provides constriction diameter pore as a function time. defines starting conditions at breakthrough. deviation conical shape most pronounced tip. This critical zone dominates transport properties...
Deviation from cone geometry significantly influences the ion current rectification through track-etched nanopores with tip radii smaller than 10 nm.