A5010661114- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Boron and Carbon Nanomaterials Research
- Advanced materials and composites
- Laser-Ablation Synthesis of Nanoparticles
- Laser-induced spectroscopy and plasma
- Semiconductor materials and interfaces
- Electrodeposition and Electroless Coatings
- Carbon Nanotubes in Composites
- Fullerene Chemistry and Applications
- Advanced optical system design
- Aluminum Alloys Composites Properties
- Laser Material Processing Techniques
- Corrosion Behavior and Inhibition
- Vacuum and Plasma Arcs
- Advanced Polymer Synthesis and Characterization
- Semiconductor materials and devices
- Hydrogels: synthesis, properties, applications
- Optical Coatings and Gratings
- Advanced Semiconductor Detectors and Materials
- Force Microscopy Techniques and Applications
- biodegradable polymer synthesis and properties
- Photonic and Optical Devices
- Advanced ceramic materials synthesis
- Carbon and Quantum Dots Applications
Institute of Fundamental Technological Research
2014-2023
Polish Academy of Sciences
2015-2023
Vigo System (Poland)
2021-2023
Silesian University of Technology
2022
The effect of laser wavelength on single-wall carbon nanotubes synthesis yield and their properties was studied. A double-pulse Nd:YAG laser, working at a 355 or 1064 nm, used for production. synthesized (CNTs) were investigated using the SEM/STEM microscopy Raman spectroscopy. results show that useful range UV radiation fluence is narrower CNTs depend much more than in case infrared radiation.
The ablation of graphite is studied as a function laser fluence for 355, 532 and 1,064 nm wavelength generated by nanosecond Nd:YAG laser. It has been found that in the case lower wavelengths, transition from thermal to phase explosion takes place at fluences. change crater shape due effect deep drilling proximity threshold was observed. calculations plasma radiation flux target surface were made, considerable increase absorbed energy density 355 wavelength.
The results of synthesis the fluorescent carbon dots (CDots) from graphite target and reduced graphene oxide (rGO) nanoparticles performed by nanosecond laser ablation in polyethylene glycol 200 (PEG200) are shown. Two-step irradiation (first target, next achieved suspension) revealed a very effective production CDots. However, PEG appeared to be with 1064 nm pulse contrast 355 pulse. In case rGO similar procedure was less efficient. both cases, received exhibited strong, broadband...
In this work, (W,Ti)B2 films with different stoichiometric ratio Ti/W deposited on silicon and 304 stainless steel by radio frequency magnetron sputtering are presented. The coatings were from plasma spark sintered targets obtained the mixture of pure boron, tungsten titanium powders. It is shown that during sintering process using overstoichiometric boron a low content change WB2 to WB4 phase almost no secondary phases. Subsequently, impact properties investigated systematically, including...
In this paper, the effect of absorption laser beam and subsequent radiation on dynamics a tungsten plasma plume during pulsed ablation is analyzed. Different wavelengths are taken into consideration. The emission coefficients in pressure range 0.1–100 MPa temperature up to 70 000 K presented. shielding effects due may have an impact course ablation. numerical model that describes target heating formation its expansion were made for 355 nm 1064 Nd:YAG laser. with Gaussian profile was focused...
We present the deposition and characterization of tungsten-tantalum diboride (W,Ta)B2 coatings prepared by high-power impulse magnetron sputtering technique. evaluated influence pulse duration substrate bias on properties films. A high hardness up to 35 GPa measured nanoindentation was simultaneously obtained with good elastic properties. Changing greatly affected B/(W+Ta) atomic ratio, which influenced coatings. The deposited films are thermally stable at 1000 °C in vacuum able withstand...
Abstract In this work, tantalum-doped tungsten boride ceramic coatings were deposited from a single sputtering target with the radio frequency (RF) and high-power impulse magnetron (HiPIMS) methods. Two-inch torus targets synthesised pure elements spark plasma sintering (SPS) method stoichiometric composition of W 1-x Ta x B 2.5 ( = 0, 0.08, 0.16, 0.24). Films RF HiPIMS power suppliers at process temperatures RT to 600 °C. The substrate heating energy ionised material impacting increase...
We report fabrication of monolithic GaAs immersion lens with a sub-milimeter diameter for InAsSb infrared detectors. The microlenses were produced by thermal reflow process cylindrical photoresist structures, followed dry etching. implementation microlens leads to an increase in the optical area photodetector, while maintaining electrical dimensions. Detectors exhibit three times higher normalized detectivity D* than flat detectors, conserving similar level resistance and current...
To enhance the properties of tungsten diboride, solid solutions this ceramic with transition metals such as titanium, zirconium, and tantalum were synthesized by spark plasma sintering from pure elements. The metallic content was in all cases 24 at.%. specimens characterized using scanning electron microscopy energy-dispersive X-ray spectroscopy for microstructure analysis, diffraction phase identification well measurements density electrical conductivity. Based on analysis curves, two...
Materials containing suspended micro- or nanomaterials are used extensively in multiple fields of research and industry. In order to understand the behavior a liquid, knowledge particle stability mobility is fundamental. For this reason, it necessary know nanoscale solid-solid interaction hydrodynamic properties particles. presented we hybrid Atomic Force Microscope coupled with Optical Tweezers system measure femtonewton scale forces acting between single particles walls microchannel at...
Polymers are becoming a very popular tool in the crystallization of different compounds. In this work, new method is proposed using stimuli-responsive star polymer order to obtain hollow structure crystals. these experiments, amphiphilic copolymer acrylic acid (AA) and methyl acrylate (MA) were used for isohydric via they cooling KCl deionized water solution. The experiments realized quartz cuvette with magnetic stirrer specialized spectrometer precise temperature control. course was...