A5055738642- Orbital Angular Momentum in Optics
- Microfluidic and Bio-sensing Technologies
- Photonic and Optical Devices
- Blood properties and coagulation
- Characterization and Applications of Magnetic Nanoparticles
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Optical Coherence Tomography Applications
- Erythrocyte Function and Pathophysiology
- Near-Field Optical Microscopy
- Nonlinear Optical Materials Studies
- Cellular Mechanics and Interactions
- Advanced Fluorescence Microscopy Techniques
- Diamond and Carbon-based Materials Research
- Laser Material Processing Techniques
- Silicon Nanostructures and Photoluminescence
- Gold and Silver Nanoparticles Synthesis and Applications
- Force Microscopy Techniques and Applications
- Nanoparticle-Based Drug Delivery
- Micro and Nano Robotics
- Advanced Fiber Optic Sensors
- Protein Interaction Studies and Fluorescence Analysis
- Lipid Membrane Structure and Behavior
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
Lomonosov Moscow State University
2015-2024
Moscow State University
2012-2023
Russian Quantum Center
2018-2021
International Society for Optics and Photonics
2015
University of Victoria
2015
Kinetics of optical tweezers (OT)-induced spontaneous aggregation and disaggregation red blood cells (RBCs) were studied at the level cell doublets to assess RBC interaction mechanics. Measurements performed under in vitro conditions plasma fibrinogen + albumin solutions. The kinetics was found exhibit different behavior depending on environment. In contrast, similar all solutions qualitatively quantitatively, demonstrating a significant contribution proteins process. impact study assessing...
Optical manipulation of nanoparticles is a topic great practical importance, with applications in surface science, colloidal chemistry, microfluidics, biochemistry, and medicine. One the major highlights this particle sorting, which serves to create monodisperse systems remotely separate particles different composition size. Here, we analyze optical forces acting on spherical silicon that exhibit high-quality Mie resonances demonstrate potential sorting methods for these systems. In...
Optically movable SERS micro-satellites are effective intracellular probes.
An experimental study of the interaction between a single dielectric microparticle and evanescent field Bloch surface wave in one-dimensional (1D) photonic crystal is reported. The wave-induced forces on 1 μm polystyrene sphere were measured by force microscopy. results demonstrate potential 1D crystals for optical manipulation microparticles suggest novel approach utilizing light lab-on-a-chip devices.
Nanocomposite capsules containing magnetite nanoparticles (MNPs) are promising multifunctional drug delivery systems for various biomedical applications. The presence of MNPs allows one to visualize these via magnetic resonance imaging (MRI) and optoacoustic (photoacoustic) imaging. Moreover, we can ensure precise navigation remote release a field gradient alternating fields, respectively. Magnetic dipole–dipole interaction between single is important when applied, it determined by moment...
Abstract One of the main issues in integrated photonics is coupling free‐space or optical fiber radiation to waveguides on photonic chip surface. The ideal coupler miniature, highly efficient, and provides a large number addressable devices. Here, new concept 3D out‐of‐plane introduced, which microscale prism exploiting frustrated total internal reflection Otto configuration excite surface electromagnetic waves near‐surface waveguide modes. A method for designing couplers operating at normal...
A novel approach to probe viscoelastic properties of cells based on double trap optical tweezers is reported. Frequency dependence the tangent phase difference in movement opposite erythrocyte edges while one forced oscillate by appeared be highly dependent rigidity cellular membrane. Effective parameters characterizing red blood with different stiffnesses (normal and glutaraldehyde-fixed) are determined. It shown that photo-induced effects caused laser trapping at power level used...
The optical properties of color centers in nanodiamonds are widely used various branches photonics and interdisciplinary studies. Here, we report on an experimental study the fundamental eigenmodes subwavelength diamond nanoparticles. reveal themselves as scattering resonances, which were measured by single-particle dark-field spectroscopy calculated both numerically analytically. resonances experience a red-shift with increasing particle size, case anisotropic particle, they change...
In this work, the preparation procedure and properties of anionic magnetic microgels loaded with antitumor drug doxorubicin are described. The functional were produced via in situ formation iron nanoparticles an aqueous dispersion polymer based on poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-PAA). composition morphology resulting composite studied by means X-ray diffraction, Mössbauer spectroscopy, IR scanning electron microscopy, atomic-force laser microelectrophoresis, static...
Abstract Thermal fluctuations significantly affect the behavior of microscale systems rotating in shear flow, such as microvortexes, microbubbles, micromotors, microactuators and other elements lab-on-a-chip devices. The influence Brownian torque on motion individual magnetic microparticles a field is experimentally determined using optical tweezers. Rotational induces flattening breakdown transition between synchronous asynchronous modes microparticle rotation. experimental findings...
Self-action of light is among the most important nonlinear optical effects with a plethora present and potential applications. Suspensions subwavelength particles are characterized by high artificial nonlinearity induced gradient forces. Here, we report on an experimental study self-action Bloch surface wave (BSW) excited at interface between one-dimensional photonic crystal water suspension dielectric nanoparticles continuous-wave diode laser. We demonstrate modification BSW resonance...
The reversible aggregation of red blood cells (RBCs) continues to be the basic science and clinical interest. Recently it has been reported about a specific binding between fibrinogen unknown erythrocyte glycoprotein receptors. aim this study was investigate whether cell (RBCA) include cell-cell interaction using membrane receptors that bind such ligands as or fibronectin. To test hypothesis RBCs were incubated with monafram - drug monoclonal antibodies against (GP) IIb/IIIa, GPIIb-IIIa...
Abstract The effect of magnetic interactions on the Brownian motion two microparticles is investigated. cross-correlations thermal fluctuations microbeads are directly measured using double-trap optical tweezers. It experimentally demonstrated that cross-correlation function governed by gradient force between microparticles. forces with femtonewton precision and dipole moments individual determined within an accuracy order fA-m 2 .
Magnetite–gold dumbbell nanoparticles are essential for biomedical applications due to the presence of two surfaces with different chemical natures and potential combination magnetic plasmonic properties. Here, remote actuation Fe3O4-Au hybrid particles in a rotating (1 Hz, 7 mT), static (7 mT) or pulsed low-frequency (31 175 mT, 30 s pulse/30 pause) field was studied. The were synthesized by high-temperature wet chemistry protocol exhibited superparamagnetic properties saturation...
The potential of photonic force microscopy (PFM) for probing the optical near-field in vicinity a dielectric multilayer is demonstrated. An experimental study Bloch surface waves (BSWs) using PFM described detail. applied technique based on measuring BSW-induced gradient acting probe particle combined with precise control distance between and surface. profile measured presented. interaction BSW evanescent field numerically studied. results indicate that polystyrene diameter 1 μm does not...
The review considers the influence of Bloch surface waves on optical and magneto-optical effects observed in photonic crystals; for example, Goos–Hänchen effect, Faraday trapping so on. Prospects using spatial light modulation, controlling polarization light, control micro-objects are discussed.
Spontaneous light emission is known to be affected by the local density of states and enhanced when coupled a resonant cavity. Here, we report on an experimental study silicon-vacancy (SiV) color center fluorescence spontaneous Raman scattering from subwavelength diamond particles supporting low-order Mie resonances in visible range. For first time our knowledge, have measured size dependences SiV rate intensity individual range 200 450 nm. The obtained reveal sequence peaks, which...
This paper studies the effect of femtosecond laser treatment in air hydrogenated amorphous silicon thin films (a-Si:H) on their structural, electrical and photoelectric properties. The possibility laser-induced crystallization a-Si:H with controlled crystalline volume fraction was shown. A sufficient increase dark conductivity observed for treated which crystallinity exceeds 7%. Such attributed to change mechanism. However, spectral dependences absorption coefficient did not show any...
The elastic properties of cells are important for many their functions, however the development label free noninvasive cellular elastography method is a challenging topic. We present novel single-cell all-optical coherence that combines optical tweezers producing mechanical excitation on cell membrane or organelle and phase-sensitive microscopy measuring sample response determining its properties. allows living imaging with lateral resolution 0.5 μm an axial up to 10 nm, making it possible...
Aggregation peculiarities of red blood cells (RBCs) in autologous plasma are studied using double trap optical tweezers technique. The positions RBCs controlled with submicrometer accuracy by two traps formed strongly focused laser beams (λ=1064 nm). Quantitative measurements interaction forces between pair aggregates performed. Depending on the aggregation force, four different end-points disaggregation induced movement revealed. Analysis experimental force dependence distance during is a...