A5066009589- nanoparticles nucleation surface interactions
- Surface and Thin Film Phenomena
- Crystallization and Solubility Studies
- Theoretical and Computational Physics
- Glass properties and applications
- Molecular Junctions and Nanostructures
- Metal and Thin Film Mechanics
- Recycling and utilization of industrial and municipal waste in materials production
- Electrochemical Analysis and Applications
- Diamond and Carbon-based Materials Research
- Cultural Heritage Materials Analysis
- Nuclear materials and radiation effects
- Pickering emulsions and particle stabilization
- Spectroscopy and Quantum Chemical Studies
- Solidification and crystal growth phenomena
- Nonlinear Dynamics and Pattern Formation
- Force Microscopy Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Thermodynamics and Statistical Mechanics
- Nanowire Synthesis and Applications
- Quantum many-body systems
- 2D Materials and Applications
- High-Temperature Coating Behaviors
- Quantum Dots Synthesis And Properties
Bulgarian Academy of Sciences
2014-2025
Institute of Physical Chemistry
2014-2025
The Sari\c{c}i\c{c}ek howardite meteorite shower consisting of 343 documented stones occurred on 2 September 2015 in Turkey and is the first fall. Cosmogenic isotopes show that experienced a complex cosmic ray exposure history, exposed during ~12-14 Ma regolith near surface parent asteroid, an ca.1 m sized meteoroid was launched by impact 22 +/- ago to Earth (as did one third all HED meteorites). SIMS dating zircon baddeleyite yielded 4550.4 2.5 4553 8.8 crystallization ages for basaltic...
Many biologically active compounds have been identified in the mucus of garden snail Cornu aspersum, which are effective treatment several diseases such as cancer, ulcers, wounds, etc. The incorporation these into green synthesis copper nanoparticles (CuONPs-Muc) was demonstrated our previous study. Based on synergistic effect two reducing agents—C. aspersum and ascorbic acid (AsA)—on CuSO4.5H2O, also act stabilizers resulting compound, a new method for “green” CuONPs-Muc is presented. Using...
Abstract Potentiostatic current transients of silver nucleation and growth were obtained on carbon screen printed electrodes (SPE) consisting single walled nanotubes, nanofibers, mesoporous carbon. Data for the number deposited particles by field-emission scanning electron microscopy. All three types SPE show presence large (µm-sized) crystals with surface density about 105 cm-2 together much smaller sizes typically below 80 nm in 108 range. The different structures do not affect shape size...
Abstract The insulating properties of anodic layers aluminum are one their most important parameters, as they determine not only corrosion resistance, but also the possibility using anodized for metal printed circuit boards. In present work, nanoporous oxide with different pore depth obtained by anodization in 1 M sulfuric acid at 20 V was reanodized boric up to 300 barrier layer thickening. change thickness, composition, and impedance increasing were investigated means scanning electron...
Several biologically active compounds involved in the green synthesis of silver and gold nanoparticles have been isolated from snail mucus characterized. This paper presents a successful method for application Cornu aspersum as bioreducing agent copper sulfate biostabilizer oxide (CuONPs-Muc) obtained. The at room temperature neutral pH yielded with spherical shape an average diameter 150 nm. structure properties CuONPs-Muc were characterized using various methods techniques, such...
The critical terrace width $\ensuremath{\lambda}$ for 2D island nucleation and growth (2DNG) on large-scale atomically flat terraces of a step-bunched Si(111)-($7\ifmmode\times\else\texttimes\fi{}7$) surface has been studied by in situ ultrahigh vacuum reflection electron microscopy as function the substrate temperature $T$ Si deposition rate $R$. dependence ${\ensuremath{\lambda}}^{2}(R)$ is characterized power law with scaling exponent $\ensuremath{\chi}=1.36--1.46$, validating an...
The deposition of thin uniform dielectric layers on graphene is important for its successful integration into electronic devices. We report the atomic layer (ALD) Al2O3 nanofilms onto grown by chemical vapor copper foil. A pretreatment with deionized water (DI H2O) functionalization was carried out, and, subsequently, trimethylaluminum and DI H2O were used as precursors process. proper temperature regime this process adjusted means ALD window a Si substrate. obtained Al2O3/graphene...
We report a two-step growth process of MoS
A general expression for the critical terrace width step flow growth accounting both permeability and asymmetric incorporation of atoms to ascending descending steps is derived. It covers cases diffusion attachment-detachment limited regimes at high low temperatures. found that when least one excess step-edge barriers equal zero, only diffusion-limited behavior regime allowed. The does not affect limiting Comparing theory with experimental data...
The present study focused on the characterization of art materials and degradation processes in exterior (exonarthex) mural paintings main church Nativity Virgin Rila monastery, Bulgaria, which is believed to be last large-scale example Eastern Orthodox wall painting. For first time used create a unique colourful polychrome decoration outer gallery possible products, caused by atmospheric influence - permanent exposure open air moisture were revealed multi-technique approach. mineral...
Palladium diselenide (PdSe2) is an important transition metal dichalcogenide with a layers-dependent bandgap and many potential applications in electronic optoelectronic devices. However, the availability of high-quality large-area crystals phase control still challenging. Herein, we report successful growth PdSe2 single using self-flux method. The crystal structure, quality, elemental composition were characterized by X-ray Diffraction, Energy-Dispersive Spectroscopy, High-Resolution...
Laser marking plays an important role in numerous technological applications because of its flexibility, fastness and versatility. The present study deals with the structural adhesional properties thin MO3 layers on stainless steel substrates prepared by a specific modification laser coating technology known as "laser bonding". This approach consists local sintering initially deposited proper powder material, which forms under irradiation layer definite graphical topological design....
We study the possibility of preparing thin CdS films on conductive glasses by high temperature molten salt electrocrystallization. The have been electrodeposited ZnO or ITO coated glass substrates in solution CdCl2 and Na2SO3 fused LiCl-KCl eutectic. They consist only hexagonal phase -CdS irrespective crystal structure (hexagonal for cubic ITO). deposited single platelets oriented with (0001) face parallel to substrate. are yellow colour show good adhesion at higher current density (>0.4 mA...
This work is concerned with development of sol–gel method for preparation nanoscaled TiO2 using organometallic precursor—titanium tetraisopropoxide (TTIP) and determination the present crystalline phases depending on temperature further thermal treatment. The characteristic processes transformations during treatment were determined by means gravimetric analysis and/or differential (TGA/DTA) method. structure size crystallites analyzed Raman spectroscopy X-ray powder diffraction (XRPD) At 250...
We studied the step dynamics during sublimation and growth in presence of electromigration force acting on adatoms. In limit fast surface diffusion slow kinetics atom attachment-detachment at steps we formulate a model free quasi-static approximation calculation adatom concentration terraces. Numerical integration equations for time evolution concentrations motion reveals two different bunching instabilities: 1) density waves (small bunches which do not manifest any coarsening) induced by...
We studied the step dynamics during crystal sublimation and growth in limit of fast surface diffusion slow kinetics atom attachment-detachment at steps. For this we formulate a model free quasi-static approximation calculation adatom concentration on terraces surface. Such provides relatively simple way to study linear stability train presence step-step repulsion an absence destabilizing factors (as Schwoebel effect, electromigration etc.). The central result is that critical velocity steps...