David Redka
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View article: Mechanisms of Laser Ablation in Liquids and Their Impact on the Efficiency of Nanoparticle Generation
Mechanisms of Laser Ablation in Liquids and Their Impact on the Efficiency of Nanoparticle Generation Open
Laser ablation in liquid is a versatile and environmentally friendly method for producing nanoparticles from a wide range of materials. While recent advances have significantly increased productivity, laser ablation in liquid remains less …
View article: Single‐Pulse Nanomorphology Governs Laser‐Induced Periodic Surface Structure Formation on Metals
Single‐Pulse Nanomorphology Governs Laser‐Induced Periodic Surface Structure Formation on Metals Open
The targeted generation of laser‐induced periodic surface structures (LIPSS) is a powerful technique in modern surface engineering. While the dominant role of optical scattering and surface electromagnetic ways in LIPSS formation is widely…
View article: Emergent B2 chemical orderings in the AlTiVNb and AlTiCrMo refractory high-entropy superalloys studied via first-principles theory and atomistic modelling
Emergent B2 chemical orderings in the AlTiVNb and AlTiCrMo refractory high-entropy superalloys studied via first-principles theory and atomistic modelling Open
We study the thermodynamics and phase stability of the AlTiVNb and AlTiCrMo refractory high-entropy superalloys using a combination of ab initio electronic structure theory—namely a concentration wave analysis—and atomistic Monte Carlo sim…
View article: Time-resolved probing of laser-induced nanostructuring processes in liquids
Time-resolved probing of laser-induced nanostructuring processes in liquids Open
Laser synthesis and processing of colloids (LSPC) in liquids has gained widespread applications in producing nanomaterials of different classes of solids. While the technical processes in different cases of ablation, fragmentation or collo…
View article: From surface roughness to crater formation in a 2D multi-scale simulation of ultrashort pulse laser ablation
From surface roughness to crater formation in a 2D multi-scale simulation of ultrashort pulse laser ablation Open
Surface roughness plays a critical role in ultrashort pulse laser ablation, particularly for industrial applications using burst mode operations, multi-pulse laser processing, and the generation of laser-induced periodic surface structures…
View article: Improving FEM-Based Solid Mechanics Simulations for Ultrashort Pulse Laser Ablation by Integrating an Equation of State and Material Separation
Improving FEM-Based Solid Mechanics Simulations for Ultrashort Pulse Laser Ablation by Integrating an Equation of State and Material Separation Open
Simulation results (raw data), COMSOL simulation files and Python evaluation scripts for the publication entitled "Two-Temperature Solid Mechanics Model incorporating an Equation of State for Readily Accessible Ultrashort Pulse Laser Ablat…
View article: Interplay between disorder and electronic correlations in compositionally complex alloys
Interplay between disorder and electronic correlations in compositionally complex alloys Open
Exploring the intricate interplay between disorder and correlations in compositionally complex alloys, our study employs resonant and valence band photoemission, optical conductivity, and electrical resistivity, complemented by density fun…
View article: Two-Temperature Solid Mechanics Model incorporating an Equation of State for Readily Accessible Ultrashort Pulse Laser Ablation Simulations
Two-Temperature Solid Mechanics Model incorporating an Equation of State for Readily Accessible Ultrashort Pulse Laser Ablation Simulations Open
Simulation results (raw data), COMSOL simulation files and Python evaluation scripts for the publication entitled "Two-Temperature Solid Mechanics Model incorporating an Equation of State for Readily Accessible Ultrashort Pulse Laser Ablat…
View article: Resolving transient temperature and density during ultrafast laser ablation of aluminum
Resolving transient temperature and density during ultrafast laser ablation of aluminum Open
To understand the dynamics of ultrashort-pulse laser ablation, the interpretation of ultrafast time-resolved optical experiments is of utmost importance. To this end, spatiotemporally resolved pump-probe ellipsometry may be utilized to exa…
View article: Chemical Vapor Deposition of Longitudinal Homogeneous Parylene Thin-Films inside Narrow Tubes
Chemical Vapor Deposition of Longitudinal Homogeneous Parylene Thin-Films inside Narrow Tubes Open
The effect of quasi-exponentially decreasing film thicknesses of thin poly-para-xylylene (PPX-N) coatings inside narrow tubes or micro scaled gaps is well known and has been discussed by many authors since the late 1970s. However, for tech…
View article: Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys
Control of ultrafast laser ablation efficiency by stress confinement due to strong electron localization in high-entropy alloys Open
In the context of current state of the art, understanding the laser ablation efficiency decrease for pulse durations High-entropy alloy; CrMnFeCoNi; Ultrafast laser ablation; Pulse duration; Ablation efficiency; Stress confinementexceeding…
View article: Time-resolved ultrafast laser ablation dynamics of thin film indium tin oxide
Time-resolved ultrafast laser ablation dynamics of thin film indium tin oxide Open
The interaction of ultrashort laser pulses above the ablation threshold of thin-film indium tin oxide (ITO) is examined with pump-probe microscopy. We are able to observe photomechanical spallation at delay times of hundreds of picoseconds…
View article: Chemical vapor deposition of poly-<i>p</i>-xylylene in narrow tubes
Chemical vapor deposition of poly-<i>p</i>-xylylene in narrow tubes Open
Depositing a film via chemical vapor deposition results in superior conformity compared with other deposition techniques, primarily due to the unique chemical interactions between the surface and the reactive compounds. This technique requ…