Evgeny Modin - Academia.edu (original) (raw)

Papers by Evgeny Modin

Strong coupling (SC) between light and matter excitations such as excitons and molecular vibratio... more Strong coupling (SC) between light and matter excitations such as excitons and molecular vibrations bear intriguing potential for controlling chemical reactivity, conductivity or photoluminescence. So far, SC has been typically achieved either between mid-infrared (mid-IR) light and molecular vibrations or between visible light and excitons. Achieving SC simultaneously in both frequency bands may open unexplored pathways for manipulating material properties. Here, we introduce a polaritonic nanoresonator (formed by h-BN layers placed on Al ribbons) hosting surface plasmon polaritons (SPPs) at visible frequencies and phonon polaritons (PhPs) at mid-IR frequencies, which simultaneously couple to excitons and atomic vibration in an adjacent molecular layer (CoPc). Employing near-field optical nanoscopy, we first demonstrate the co-localization of strongly confined near-fields at both visible and mid-IR frequencies. After covering the nanoresonator structure with a layer of CoPc molecules, we observe clear mode splittings in both frequency ranges by far-field transmission spectroscopy, unambiguously revealing simultaneous SPP-exciton and PhP-vibron coupling. Dual-band SC may be exploited for manipulating the coupling between excitons and molecular vibrations in future optoelectronics, nanophotonics, and quantum information applications.

Nanomaterials

Here, we show that direct femtosecond laser nanostructuring of monocrystalline Si wafers in aqueo... more Here, we show that direct femtosecond laser nanostructuring of monocrystalline Si wafers in aqueous solutions containing noble-metal precursors (such as palladium dichloride, potassium hexachloroplatinate, and silver nitrate) allows for the creation of nanogratings decorated with mono- (Pd, Pt, and Ag) and bimetallic (Pd-Pt) nanoparticles (NPs). Multi-pulse femtosecond-laser exposure was found to drive periodically modulated ablation of the Si surface, while simultaneous thermal-induced reduction of the metal-containing acids and salts causes local surface morphology decoration with functional noble metal NPs. The orientation of the formed Si nanogratings with their nano-trenches decorated with noble-metal NPs can be controlled by the polarization direction of the incident laser beam, which was justified, for both linearly polarized Gaussian and radially (azimuthally) polarized vector beams. The produced hybrid NP-decorated Si nanogratings with a radially varying nano-trench orienta...

Nature Communications

Phonon polariton (PhP) nanoresonators can dramatically enhance the coupling of molecular vibratio... more Phonon polariton (PhP) nanoresonators can dramatically enhance the coupling of molecular vibrations and infrared light, enabling ultrasensitive spectroscopies and strong coupling with minute amounts of matter. So far, this coupling and the resulting localized hybrid polariton modes have been studied only by far-field spectroscopy, preventing access to modal near-field patterns and dark modes, which could further our fundamental understanding of nanoscale vibrational strong coupling (VSC). Here we use infrared near-field spectroscopy to study the coupling between the localized modes of PhP nanoresonators made of h-BN and molecular vibrations. For a most direct probing of the resonator-molecule coupling, we avoid the direct near-field interaction between tip and molecules by probing the molecule-free part of partially molecule-covered nanoresonators, which we refer to as remote near-field probing. We obtain spatially and spectrally resolved maps of the hybrid polariton modes, as well ...

Advanced Optical Materials

Ultrashort laser pulses deliver electromagnetic energy to matter causing its localized heating th... more Ultrashort laser pulses deliver electromagnetic energy to matter causing its localized heating that can be used for both material removal via ablation/evaporation and driving interface chemical reactions. Here, it is shown that both mentioned processes can be simultaneously combined within straightforward laser nanotexturing of Si wafer in a functionalizing solution to produce a practically relevant metal–semiconductor surface nano‐morphology. Such unique hybrid morphology represents deep‐subwavelength Si laser‐induced periodic surface structures (LIPSSs) with an extremely short period down to 70 nm and high‐aspect‐ratio nano‐trenches loaded with controllable amount of plasmonic nanoparticles formed via laser‐induced decomposition of the precursor noble‐metal salts. Moreover, heat localization driving reduction process is utilized to produce surface morphology locally decorated with dissimilar plasmon‐active nanoparticles. Light‐absorbing deep‐subwavelength Si LIPSSs loaded with con...

Scientific Reports

Nanocrystalline structured variants of commercially available alloys have shown potential for boo... more Nanocrystalline structured variants of commercially available alloys have shown potential for boosting the mechanical properties of these materials, leading to a reduction in waste and thereby retaining feasible supply chains. One approach towards achieving these nanostructures resides in frictional treatments on manufactured parts, leading to differential refinement of the surface structure as compared to the bulk material. In this work the machining method is considered to be a testing platform for the formation and study of frictional nanostructured steel, assembly of which is stabilized by fast cooling of the produced chip. Analysis of the mechanical properties has shown extraordinary results at the surface, over 2000 MPa of strength on AISI1045 steel, more than three times the strength of the base material, demonstrating at the same time a reduction of 15% in the elastic modulus. The microscopic analysis suggests a reassembly of the elements in a new lattice of carbon supersatu...

Advanced Materials, 2022

Pentagonal packing is a long‐standing issue and a rich mathematical topic, brought to the fore by... more Pentagonal packing is a long‐standing issue and a rich mathematical topic, brought to the fore by recent progress in nanoparticle design. Gold pentagonal bipyramids combine fivefold symmetry and anisotropy and their section varies along the length. In this work, colloidal supercrystals of pentagonal gold bipyramids are obtained in a compact arrangement that generalizes the optimal packing of regular pentagons in the plane. Multimodal investigations reveal a two‐particle unit cell with triclinic symmetry, a lower symmetry than that of the building blocks. Monte Carlo computer simulations show that this lattice achieves the densest possible packing. Going beyond pentagons, further simulations show an odd–even effect of the number of sides on the packing: odd‐sided bipyramids are non‐centrosymmetric and require the double‐lattice arrangement to recover inversion symmetry. The supercrystals display a facet‐dependent optical response that is promising for sensing, metamaterials applicati...

ACS Applied Nano Materials, 2022

Silicon-based polymers show great promise for various applications in biomedicine, nanotechnology... more Silicon-based polymers show great promise for various applications in biomedicine, nanotechnology, tissue targeting, and drug delivery. The use of such materials as functional coatings on surfaces requires the development of strongly adhering and flexible conformal films, which is challenging for conventional wetchemical coating techniques. We have developed a facile, solvent-free molecular layer deposition (MLD) process to grow environmentally stable hybrid alumosilazane thin films. Exceptionally good biocompatibility is testified with significantly higher proliferation of human embryonic kidney (HEK293T) cells than that on glass, which was used as a reference. Such highly biocompatible and conformal films show great promise as functional coatings for scaffolds or implantable devices with complex topologies or high-aspect-ratio structures.

Proceedings of the European Microscopy Congress 2020, 2021

arXiv: Applied Physics, 2020

Rational combination of plasmonic and all-dielectric concepts within unique hybrid nanomaterials ... more Rational combination of plasmonic and all-dielectric concepts within unique hybrid nanomaterials provides promising route toward devices with ultimate performance and extended modalities. However, spectral matching of plasmonic and Mie-type resonances for such nanostructures can only be achieved for their dissimilar characteristic sizes, thus making the resulting hybrid nanostructure geometry complex for practical realization and large-scale replication. Here, we produced unique amorphous TiO$_2$ nanospheres simultaneously decorated and doped with Au nanoclusters via single-step nanosecond-laser ablation of commercially available TiO$_2$ nanopowders dispersed in aqueous HAuCl$_4$. The fabricated hybrids demonstrate remarkable light-absorbing properties (averaged value approx\approxapprox 96%) in the visible and near-IR spectral range mediated by bandgap reduction of the laser-processed amorphous TiO$_2$, as well as plasmon resonances of the decorating Au nanoclusters, which was confirmed by c...

Highly porous functional materials such as membranes, bone-like composites with multimodal pore d... more Highly porous functional materials such as membranes, bone-like composites with multimodal pore distribution or porous magnetic ceramics are of great interest due to their properties. In this work we studying a number of porous structures with typical pores size from tens nanometers to several micrometers by means of focused ion beam (FIB) nano-tomography. In this particular case SEM images of SPS-sintered Fe2O3 ceramic were obtained using an Helios NanoLab 450S (FEI, The Netherlands) with accelerating voltage of 1 to 5 kV and beam current 100 pA. To obtain information about the internal structure of the samples we carried out studies using the FIB technique. The focused Ga-ion beam allows to get precision cuts with step up to few nanometers [1]. To create three-dimensional reconstructions the FIB tomography technique was used. Series of slices were obtained automatically via FEI Auto Slice and View G3 software. The number of slices was about 200 300, with approximately slice thickn...

Chemistry of Materials, 2021

Molecular layer deposition (MLD) is a powerful vapor phase approach for growing thin polymer film... more Molecular layer deposition (MLD) is a powerful vapor phase approach for growing thin polymer films with molecular-level thickness control. We applied the ring-opening MLD process to deposit a siloxane-alumina hybrid organic− inorganic thin film using tetramethyl-tetravinylcyclotetrasiloxane (V 4 D 4) and trimethylaluminum (TMA) as precursors. In situ studies of this process with a quartz crystal microbalance (QCM) showed a linear mass increase with the number of MLD cycles within a processing temperature window between 120 and 200°C. The QCM study also revealed self-limiting surface chemistry. A growth per cycle of 1.4 and 1.6 Å and a density of 1.9 and 2.2 g cm −3 were determined by X-ray reflectivity (XRR) for the V 4 D 4 / TMA film deposited at 150 and 200°C, respectively. X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and in situ QCM were employed to analyze the structural changes and composition of the film. High-resolution transmission electron microscopy (HRTEM) was used to confirm the conformality of the obtained coatings. The grown siloxane-alumina film, even as thin as 12 nm, showed an extremely low leakage current density (lower than 5.1 × 10 −8 A cm − 2 at ± 2.5 MV cm −1), a dielectric constant (k) of 4.7, and a good thermal stability after one-hour annealing in air at 1100°C. The obtained highly conformal and thermally stable siloxane-alumina insulating film can be used as a component of field-effect transistors, flash memories, and capacitors in modern electronic systems.

Applied Catalysis B: Environmental, 2021

Highlights  MnO2 and Mn2O3 decorated with Fe2O3 or Co3O4 are fabricated by a plasma-assisted MnO... more Highlights  MnO2 and Mn2O3 decorated with Fe2O3 or Co3O4 are fabricated by a plasma-assisted MnO2 Fe2O3-MnO2 Co3O4-MnO2

Progress on Chemistry and Application of Chitin and its Derivatives, 2019

Here, we report the fabrication of supermacroporous monolith sorbents for acidic dye removal via ... more Here, we report the fabrication of supermacroporous monolith sorbents for acidic dye removal via chitosan cross-linking with ethylene glycol diglycidyl ether (EGDGE) in acidic medium at sub-zero temperature. The developed porous structure with the thickness of polymer walls in the range of a few microns and a high content of primary amino groups determined the high sorption capacity of the sorbents toward Alizarin Red in a broad pH range (2-8). Due to the cross-linking via hydroxyl groups of the chitosan, the static sorption capacity of the fabricated materials was higher than that of chitosan flakes, even for sorbents cross-linked at EGDGE:NH2-chitosan with molar ratio 2:1. The monolith sorbents were mechanically stable and supported flow rates up to 300 bed volumes per hour. The breakthrough curve of Alizarin Red sorption showed that the effective dynamic sorption capacity was 283 mg/g, and 100% of the dye could be removed from the solutions with concentration of 100 mg/L. The monoliths can be regenerated with 0.3s M NaOH solution and used in several consecutive cycles of sorption/regeneration without loss of efficacy.

Radiochemistry, 2019

The possibility of using spark plasma sintering (SPS) for preparing high-density ceramic matrices... more The possibility of using spark plasma sintering (SPS) for preparing high-density ceramic matrices suitable for firm long-term immobilization of Cs radionuclides was examined. The kinetic features of sintering and phase formation of natural zeolite from the Far Eastern deposit, loaded with the adsorbed Cs ions (surrogate of radiocesium), under nonequilibrium SPS conditions were analyzed. The optimum SPS conditions were determined, and high-quality glass-ceramic matrices based on zeolites from various deposits, characterized by high density (98.5-99.8% of theoretical density), high compression strength (470-490 MPa), Cs content of up to 20.8 wt %, and low Cs leach rates (<10-5-10-6 g cm-2 day-1), were prepared. The SPS technology shows promise for radioactive waste management (in particular, for solidification of spent radioactive sorbents) and radioisotope industry (in particular, for production of special-purpose radionuclide sources).

Colloids and Surfaces B: Biointerfaces, 2019

assisted synthesis and cytotoxicity of ZnSe quantum dots stabilized by N-(2-carboxyethyl)chitosan... more assisted synthesis and cytotoxicity of ZnSe quantum dots stabilized by N-(2-carboxyethyl)chitosans, Colloids and Surfaces B: Biointerfaces (2019),

ACS Nano, 2019

Atmospheric icing became a global concern due to hazardous consequences of ice accretion on air, ... more Atmospheric icing became a global concern due to hazardous consequences of ice accretion on air, land and sea transport and infrastructure. Icephobic surfaces due to their physicochemical properties facilitate a decrease in ice and snow accumulation under outdoor conditions. However, a serious problem of most superhydrophobic surfaces described in the literature is poor operational durability under harsh corrosive and abrasive loads characteristic of atmospheric operation. Here we elucidate main surface phenomena determining the anti-icing behavior and show experimentally how different mechanisms contribute to long-term durability. For comprehensive exploitation of those mechanisms, we have applied a recently proposed strategy based on fine tuning of both laser processing and protocols of deposition of the fluorooxysilanes onto the nanotextured surface. Prolonged outdoor tests evidence that a developed strategy for modification of materials on the nanolevel allows overcoming the main drawbacks of icephobic coatings reported so far and results in resistance to destroying atmospheric impacts.

Scientific Reports, 2019

Fibrin glue has been used clinically for decades in a wide variety of surgical specialties and is... more Fibrin glue has been used clinically for decades in a wide variety of surgical specialties and is now being investigated as a medium for local, prolonged drug delivery. Effective local delivery of antibacterial substances is important perioperatively in patients with implanted medical devices or postoperatively for deep wounds. However, prolonged local application of antibiotics is often not possible or simply inadequate. Biofilm formation and antibiotic resistance are also major obstacles to antibacterial therapy. In this paper we test the biocompatibility of bacteriophages incorporated within fibrin glue, track the release of bacteriophages from fibrin scaffolds, and measure the antibacterial activity of released bacteriophages. Fibrin glue polymerized in the presence of the PA5 bacteriophage released high titers of bacteriophages during 11 days of incubation in liquid medium. Released PA5 bacteriophages were effective in killing Pseudomonas aeruginosa PA01. Overall, our results s...

Royal Society Open Science, 2018

Hafnium-doped titania (Hf/Ti = 0.01; 0.03; 0.05) had been facilely synthesized via a template sol... more Hafnium-doped titania (Hf/Ti = 0.01; 0.03; 0.05) had been facilely synthesized via a template sol–gel method on carbon fibre. Physico-chemical properties of the as-synthesized materials were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis, scanning transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry analysis and Brunauer–Emmett–Teller measurements. It was confirmed that Hf 4+ substitute in the Ti 4+ sites, forming Ti 1– x Hf x O 2 ( x = 0.01; 0.03; 0.05) solid solutions with an anatase crystal structure. The Ti 1– x Hf x O 2 materials are hollow microtubes (length of 10–100 µm, outer diameter of 1–5 µm) composed of nanoparticles (average size of 15–20 nm) with a surface area of 80–90 m 2 g –1 and pore volume of 0.294–0.372 cm 3 g –1 . The effect of Hf ion incorporation on the electrochemical behaviour of anatase TiO 2 in the Li-ion battery anode was investigated by galvanostati...

Applied Materials Today, 2018

Remarkable shape memory, superelasticity and rubber-like effects on the submicron scale have been... more Remarkable shape memory, superelasticity and rubber-like effects on the submicron scale have been disclosed in Ni-Fe(Co)-Ga and Ni-Mn-Ga ferromagnetic shape memory alloys. Arrays of pillars with the different cross-section and length have been prepared onto 001-oriented faces of the alloys single crystals and their thermomechanical behavior across the martensitic transformation was studied in the bending mode inside a scanning electron microscope. Recovered strains of up to 5% and 7% have been obtained as a result of shape memory and superelasticity effects, respectively. These findings are important for the development of novel micro/nanoelectromechanical systems to be controlled, contactless, by a magnetic field.

ACS Applied Nano Materials, 2018

A method based on nanosecond laser treatment was used to design superhydrophobic and superhydroph... more A method based on nanosecond laser treatment was used to design superhydrophobic and superhydrophilic aluminum alloy substrates showing enhanced cytotoxic activity with respect to Escherichia coli K12 C600 strain. It was shown that the survival of cells adhered to the superhydrophobic substrates was significantly affected by the presence of organic contaminants, which are ubiquitous in hospital practice and the food industry. The peculiarities of the texture also played a notable role in anti-bactericidal activity. It was found that the superhydrophilic surfaces had much higher toxicity than the superhydrophobic ones, which was explained by the mechanisms of adhesion of cells to the surface. Scanning electron microscopy and tomographic reconstruction of the adhered cells were used to study the variation of cell morphology after attachment to surfaces with different wettability. It was shown that the cytotoxicity of superhydrophobic surfaces could be significantly enhanced by using the combined antimicrobial action of bacteriophages and the superhydrophobicity of the objects. INTRODUCTION Escherichia coli (E. coli) is a Gram-negative bacterium which is widely studied in the literature. This interest is motivated by the highly pathogenic character of certain strains of E. coli. Numerous recent reviews 1-5 consider E. coli to be one of the most frequent causes of certain bacterial infections in humans and animals. For example, E. coli is associated with urinary tract infections and neonatal sepsis, enteritis, hemorrhagic colitis, septicaemia and other clinical infections. Several strains, such as E. coli O157:H7 and O104:Н4, are important foodborne pathogens, 6,7 while others are mainly responsible for morbidity and mortality in hospitals through various medical device-associated infections from urethral and intravascular catheters,