A5014291247- Laser Material Processing Techniques
- Laser-induced spectroscopy and plasma
- Adhesion, Friction, and Surface Interactions
- Fullerene Chemistry and Applications
- Porphyrin and Phthalocyanine Chemistry
- Synthesis and Properties of Aromatic Compounds
- Diamond and Carbon-based Materials Research
- Surface Roughness and Optical Measurements
- Tribology and Lubrication Engineering
- Metal and Thin Film Mechanics
- Carbon Nanotubes in Composites
- Ocular and Laser Science Research
- Cephalopods and Marine Biology
- Photodynamic Therapy Research Studies
- Molecular Junctions and Nanostructures
- Photochemistry and Electron Transfer Studies
- Additive Manufacturing Materials and Processes
- Photonic Crystals and Applications
- Nanoplatforms for cancer theranostics
- Cultural Heritage Materials Analysis
- Laser-Ablation Synthesis of Nanoparticles
- Laser Applications in Dentistry and Medicine
Federal Institute For Materials Research and Testing
2016-2022
Friedrich-Alexander-Universität Erlangen-Nürnberg
2012-2016
Laser-induced periodic surface structures (LIPSS, ripples) are a universal phenomenon and can be generated on almost any material upon irradiation with linearly polarized radiation. With the availability of ultrashort laser pulses, LIPSS have gained an increasing attraction during past decade, since these in simple single-step process, which allows nanostructuring for tailoring optical, mechanical, chemical properties. In this study, current state field is reviewed. Their formation...
Laser texturing is an emerging technology for generating surface functionalities on basis of optical, mechanical, or chemical properties. Taking benefit laser sources with ultrashort (fs) pulse durations features outstanding precision machining and negligible rims burrs surrounding the laser-irradiation zone. Consequently, additional mechanical post-processing steps are usually not required fs-laser (fs-LST). This work aimed to provide a bridge between research in field tribology materials...
The past 25 years have served as a test bed for exploring the chemistry and physics, in general, electron transfer chemistry, particular, of low‐dimensional carbon. Nevertheless, new realm started with advent fullerenes, followed chronological order by carbon nanotubes, and, more recently, graphene. major thrust this Review article is to historically recap versatility fullerenes regarding design, synthesis, tests an electroactive building block photosynthetic reaction mimics, photovoltaics,...
In recent years, the improved understanding of formation laser-induced periodic surface structures (LIPSS) has led to an emerging variety applications that modify optical, mechanical, and chemical properties many materials. Such strongly depend on laser beam polarization are formed usually after irradiation with ultrashort linearly polarized pulses. The most accepted explanation for origin is based interference incident radiation electromagnetic waves propagate or scatter at irradiated This...
Laser-induced periodic surface structures (LIPSS, ripples) are a universal phenomenon that can be observed on almost any material after the irradiation by linearly polarized laser beams, particularly when using ultrashort pulses with durations in picosecond to femtosecond range. During past few years significantly increasing research activities have been reported field of LIPSS, since their generation single-step process provides simple way nanostructuring and functionalization towards...
Abstract In this contribution, chemical, structural, and mechanical alterations in various types of femtosecond laser-generated surface structures, i.e., laser-induced periodic structures (LIPSS, ripples), Grooves, Spikes on titanium alloy, are characterized by analytical techniques, including X-ray diffraction glow-discharge optical emission spectroscopy. The formation oxide layers the different laser-based inherently influences friction wear performance as demonstrated oil-lubricated...
The chemical characteristics of two different types laser-induced periodic surface structures (LIPSS), so-called high and low spatial frequency LIPSS (HSFL LSFL), formed upon irradiation titanium surfaces by multiple femtosecond laser pulses in air (30 fs, 790 nm, 1 kHz), are analyzed various optical electron beam based analytical techniques, including micro-Raman spectroscopy, energy dispersive X-ray analysis, photoelectron Auger spectroscopy. latter method was employed a high-resolution...
Laser-induced periodic surface structures (LIPSS) are often present when processing solid targets with linearly polarized ultrashort laser pulses. The different irradiation parameters to produce them on metals, semiconductors and dielectrics have been studied extensively, identifying suitable regimes tailor its properties for applications in the fields of optics, medicine, fluidics tribology, name a few. One important parameter widely exposing samples high intensities provided by these...
A new set of [Cu(phen)<sub>2</sub>]<sup>+</sup> based rotaxanes, featuring [60]-fullerene as an electron acceptor and a variety donating moieties, namely zinc porphyrin (ZnP), phthalocyanine (ZnPc) ferrocene (Fc), has been synthesized fully characterized.
Miniaturized pacemakers with a surface consisting of Ti alloy may have to be removed after several years from their implantation site in the heart and shall, therefore, not completely overgrown by cells or tissue. A method avoid this create at laser-ablation self-organized sharp conical spikes, which provide too little for (i.e., fibroblasts) grow on. For purpose, Ti-alloy substrates were irradiated air 790 nm Ti:sapphire femtosecond laser pulses fluences above ablation threshold. The...
The current state in the field of laser-induced periodic surface structures (LIPSS, ripples) is reviewed. Their formation mechanisms are analyzed ultrafast experiments (time-resolved diffraction and polarization controlled double-pulse experiments) technological applications demonstrated.
Nanoscale electron donor–acceptor systems with [2]catenane architectures, magnesium porphyrin (MgP) or free base (H<sub>2</sub>P) as donor and C<sub>60</sub>as acceptor, have been investigated.
The on–off switch of charge separated states in a new series pyridine-vinylene linked porphyrin–C<sub>60</sub> conjugates was detected by EPR at 77 K.
Two phthalocyanines (Pcs) with either a zinc or ruthenium metal at the center of macrocycle have been functionalized by cholesteryl oleate moiety. The potential photosensitizers (PSs) for treatment cutaneous leishmaniasis studied on their photophysical properties and ability to generate singlet oxygen. These experiments corroborate that solvent mixtures containing variable ratios THF water impact excited state deactivation. compounds were used preloaded into LDL particles phototoxic activity...
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