Irradiation with ultra-short (femtosecond) laser beams enables the generation of sub-wavelength laser-induced periodic surface structures (LIPSS) over large areas with controlled spatial periodicity, orientation, and depths affecting only a material layer on the sub-micrometer scale. This study reports on how fs-laser irradiation of commercially available Nb foil samples affects their superconducting behavior. DC magnetization and AC susceptibility measurements at cryogenic temperatures and with magnetic fields of different amplitude and orientation are thus analyzed and reported. This study pays special attention to the surface superconducting layer that persists above the upper critical magnetic field strength , and disappears at a higher nucleation field strength . Characteristic changes were distinguished between the surface properties of the laser-irradiated samples, as compared to the corresponding reference samples (non-irradiated). Clear correlations have been observed between the surface nanostructures and the nucleation field , which depends on the relative orientation of the magnetic field and the surface patterns developed by the laser irradiation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7765670 | PMC |
| http://dx.doi.org/10.3390/nano10122525 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The effect of pipette- and laser-induced blastocyst collapse before vitrification on their re-expansion and clinical outcome after warming.
Reprod Biomed Online
October 2024
Department of Gynaecology, Obstetrics, and Gynaecological Endocrinology, Kepler University Hospital, Linz, Austria. Electronic address:
Research Question: What are the effects of pipette- versus laser-assisted artificial blastocyst collapse (ABC) on the morphokinetics of warmed blastocyst re-expansion, and what is the potential effect on treatment outcomes?
Design: Surplus blastocysts were extracted from 203 patients. These were divided into three groups: study group A, artificial collapsed by the aspiration of blastocoel fluid with a pipette; study group B, trophectoderm opened with a laser pulse; control group, no manipulation before vitrification was performed. During the 5-year study period, 257 associated single-warm blastocyst transfers were scheduled.
Tracing the Formation of Femtosecond Laser-Induced Periodic Surface Structures (LIPSS) by Implanted Markers.
ACS Appl Mater Interfaces
January 2025
Institute of Materials Science and Engineering, Chemnitz University of Technology, Erfenschlager Straße 73, Chemnitz 09125, Germany.
The generation of laser-induced periodic surface structures (LIPSS) using femtosecond lasers facilitates the engineering of material surfaces with tailored functional properties. Numerous aspects of their complex formation process are still under debate, despite intensive theoretical and experimental research in recent decades. This particularly concerns the challenge of verifying approaches based on electromagnetic effects or hydrodynamic processes by experiment.
View Article and Find Full Text PDFFabrication of hafnium-based nanoparticles and nanostructures using picosecond laser ablation.
Beilstein J Nanotechnol
December 2024
School of Physics, University of Hyderabad, Hyderabad 500046, Telangana, India.
This work presents a unique and straightforward method to synthesise hafnium oxide (HfO) and hafnium carbide (HfC) nanoparticles (NPs) and to fabricate hafnium nanostructures (NSs) on a Hf surface. Ultrafast picosecond laser ablation of the Hf metal target was performed in three different liquid media, namely, deionised water (DW), toluene, and anisole, to fabricate HfO and HfC NPs along with Hf NSs. Spherical HfO NPs and nanofibres were formed when Hf was ablated in DW.
View Article and Find Full Text PDFElectrodeposited hydroxyapatite coating on titanium after ultrashort-pulsed laser processing for a novel surface of endosseous implants.
Dent Med Probl
December 2024
Department of Prosthetic Dentistry and Gerodontology, Poznan University of Medical Sciences, Poland.
Background: Ceramic endosseous implant coatings have gained esteem due to their favorable osteoinductive and osteoconductive properties. However, such a layer may be prone to failure under in vivo conditions, which necessitates its modification.
Objectives: The aim of the present study was to modify an electrodeposited hydroxyapatite (HA) coating on titanium (Ti) with ultrashort-pulsed lasers for the incorporation of the ceramic into the sample surface and the texturing of the metal surface.
Effect of Nanosecond Laser Texturization on Tribological Behavior of AISI 321 Stainless Steel.
Materials (Basel)
November 2024
Faculty of Mechanical Engineering, Poznań University of Technology, Piotrowo 3, 61-138 Poznań, Poland.
Article Synopsis
- This study examines how laser surface modifications can improve wear resistance, hardness, and friction in both dry and lubricated conditions.
- The research uses nanosecond pulsed laser treatment to create different surface structures on steel, aiming to increase wear resistance and decrease the coefficient of friction (COF).
- Findings suggest that laser texturing enhances hardness, modifies surface wettability, reduces COF, and promotes better lubrication retention, making it a beneficial technique for industries needing durable materials.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!