A5045798580- Laser-Ablation Synthesis of Nanoparticles
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-induced spectroscopy and plasma
- Innovative Microfluidic and Catalytic Techniques Innovation
- Polymer composites and self-healing
- Microfluidic and Capillary Electrophoresis Applications
- Laser Material Processing Techniques
- Blood properties and coagulation
- 3D Printing in Biomedical Research
- Platelet Disorders and Treatments
- Advanced biosensing and bioanalysis techniques
- Surface Modification and Superhydrophobicity
- Ion-surface interactions and analysis
- Advanced Welding Techniques Analysis
- Cellular Mechanics and Interactions
- Advancements in Photolithography Techniques
- Laser Applications in Dentistry and Medicine
- Polymer Nanocomposite Synthesis and Irradiation
- Optical Polarization and Ellipsometry
- Copper Interconnects and Reliability
- Cultural Heritage Materials Analysis
- Blood groups and transfusion
- Rheology and Fluid Dynamics Studies
- Laser-Plasma Interactions and Diagnostics
- Welding Techniques and Residual Stresses
Budapest University of Technology and Economics
2018-2025
HUN-REN Wigner Research Centre for Physics
2022-2025
Hungarian Academy of Sciences
2022-2023
Institute for Solid State Physics and Optics
2022-2023
Abstract The bonding configuration of the crater walls formed in urethane dimethacrylate-based polymer doped with plasmonic gold nanorods upon irradiation a single-shot high-energy femtosecond laser pulse has been studied by Raman spectroscopy. New bands were detected 2000–2500 cm -1 region spectrum intensities which showed strong dependence on concentration nanoparticles and energy pulse. Based model calculations frequencies these peaks attributed to carbon-deuterium nitrogen-deuterium...
Plasmonic nanoparticles embedded into a solid matrix could play crucial role in laser-matter interactions. In this study, excess energy creation was observed during the single-shot irradiation of polymer containing plasmonic gold nanorods, resonant to laser wavelength, with high intensity femtosecond pulse. This effect manifested 7-fold rise crater volume for 1.7-fold increase intensity, and absent pure without doping. It occurred at intensities > 1.5 x 1017 W/cm2, being vanishing threshold...
In this work, the effects of femtosecond laser irradiation and doping with plasmonic gold nanorods on degree conversion (DC) a urethane dimethacrylate (UDMA)-triethylene glycol (TEGDMA) nanocomposite were investigated. The UDMA-TEGDMA photopolymer was prepared in 3:1 weight ratio doped dodecanethiol- (DDT) capped 25 × 75 or 85 nm nominal diameter length. It found that presence alone (without direct excitation) can increase DC by 6-15%. This to be similar what could achieved control heat...
Multicellular tumor spheroids are rapidly emerging as an improved in vitro model with respect to more traditional 2D culturing. Microwell culturing is a simple and accessible method for generating large number of uniformly sized spheroids, but commercially available systems often do not enable researchers perform complete analysis pipelines the mechanical properties their culture environment commonly matching those target tissue. We herein report obtain custom-designed self-built microwell...
A status report is presented about the Nanoplasmonic Laser Induced Fusion Experiment (NAPLIFE). The goal to investigate and verify plasmonically enhanced phenomena on surfaces of nanoantennas embedded in a polymer target at laser intensities up few times 1016 W/cm2 pulse durations 40–120 fs. first results crater formation for Au-doped targets are shown, SERS signals typical CD2 ND bound vibrations cited. Trials detect D/H ratio by means LIBS measurments reported. Plasmonics has potential...
Polydimethylsiloxane (PDMS)–gold/silver nanoparticle composite films were synthetized in situ by using a simple method, which is based on the reduction of chloroauric acid (HAuCl4) or silver nitrate solution (AgNO3) PDMS membrane. A method to monitor development plasmonic absorbance peak (during synthesis nanoparticles) introduced order provide convenient way investigate effect technological parameters position resulting peak. The tested as SERS substrates at two excitation wavelengths (488...
The impact of heating and cooling cycles on a copolymer mixture urethane dimethacrylate (UDMA) triethylene glycol (TEGDMA), with without gold nanorod doping was studied by using in-situ Raman spectroscopy. made in 3:1 ratio 0.1236 m/m% concentration 25 nm x 85 nanorods added. Heating between 30°C 140°C applied two distinct vibration bands at 1447 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> (C–H bond) 1638 (methacrylate C =...
The changes in the bonding configuration on crater walls formed urethane dimethacrylate based polymer doped with plasmonic gold nanorods upon irradiation a single-shot high energy femtosecond laser pulse has been studied by Raman spectroscopy. New bands were detected 2000-2500 cm-1 region of spectrum intensities which show strong dependence concentration nanoparticles and pulse. Based model calculations frequencies these peaks attributed to carbon-deuterium nitrogen-deuterium vibrations...
Von Willebrand factor (vWF) is the largest glycoprotein in blood, which plays a major role primary haemostasis via its interaction with endothelial cell surface receptors and platelets. Altered shear stress value can cause conformational unfolding of vWF, leads to activation factor. The aim this work study effect on vWF designed microfluidic chambers. Numerical simulations were performed different three-dimensional system models, including two input channels converging forming single output....
The effects of heat treatment on a urethane dimethacrylate (UDMA) - triethylene glycol (TEGDMA) copolymer with and without gold nanorod doping were investigated in-situ Raman spectroscopy. was prepared in 3:1 ratio, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$25\ \text{nm} \times 85\ \text{nm}$</tex> nanorods 0.1236 m/m% concentration doped into the mixture. Heating cooling cycles applied between 30°C to 140°C, two characteristic vibration...
Silver and gold nanoparticles embedded into the surface of PDMS (polydimethylsiloxane) were investigated. The nanocomposites synthesized both on membranes inside PDSM based microfluidic chips. fabrication methods optimized in order to maximize bulk refractive index sensitivity nanocomposites. sensors are intended for biosensor applications, where a bioreceptor layer would be formed bind target molecules. produced nanolayers characterized by Raman-spectroscopy optical spectroscopy their...
Numerical simulations were performed on the three-dimensional model of a microfluidic system, which includes two input channels converging and forming single output. The primary aim investigation was characterization flow field, namely velocity shear stress, emerge between different types fluids with viscosity density. strength acting plays an important role in activating von Willebrand factor (VWF), glycoprotein essential during blood hemostasis. main application designed cell will be...
surface-enhanced Raman spectroscopy (SERS) is adopted in a microfluidic cell to detect Rhodamine 6G (R6G) dye molecules using gold nanoparticle Au NP’s –epoxy surface nanocomposite as substrates. We studied the effect of changing environment’s refractive index RI at nanocomposites’ by solution 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</sup> M different water + ethylene glycol (EG) mixtures with concentrations ranging from 25-100%....
Gold nanomaterials are used in several application areas, such as biosensing, nanomedicine and catalysis. Triangular nanoprisms (flat nanoobjects with a triangular base) gained much attention the past few years due to their unique anisotropic shape, optical plasmonic properties. In this work were prepared using seed-mediated growth method polar solvent. The synthetized particles examined SEM (scanning electron microscopy) absorption spectra also measured by spectrophotometry. aim of is...
In this work, a 3D model was designed that has the negative of several widely used microfluidic mixers and channel patterns, which could be to cast polymers, e.g. PDMS (polydimethylsiloxane). This printed by using two most common printing technologies, namely fused deposition modeling (FDM) stereolithography (SLA), precision fabricated models measured compared in order find out technology applied more effectively for applications.
In this work, the plasma etching rate of UDMA-TEGDMA (urethane-dimethacrylate – triethyleneglycol dimethacrylate) 3:1 resin composite was investigated. Thin layers (between 20–200 um) photopolymer were created on glass substrates, then thickness layer measured with white light interferometry. Subsequently, samples exposed to hydrogen, argon, and other gas mixture-based plasmas in a microwave reactor at different conditions (power, pressure, time). After treatment, films again, various tested...