Results 21 to 30 of about 6,746,161 (288)

Synthesis and Modification of Nanostructured Thin Films

open access: yesNanomaterials, 2019
The idea of nanomaterials, nanoscience, and nanotechnologies was formulated by Richard Feynman in 1959 in his famous lecture “There’s Plenty of Room at the Bottom” [...]
Ion N. Mihailescu
doaj   +1 more source

Kinetics of Laser Induced Plasma on an Aqueous Surface [PDF]

open access: yesLaser Chemistry, 2002
Emission spectra of MgI and MgII from a plasma induced by the interaction of a laser pulse with the surface of aqueous solutions of MgCl2, were recorded by a time resolved spectroscopy method to obtain information on the processes involved in the formation and the evolution of the two different species.
J. Ben Ahmed, Z. Ben Lakhdar, G. Taieb
openaire   +1 more source

Pulse duration dependent laser-induced plasma etching of polyimide using a high repetition rate laser

open access: yesApplied Surface Science Advances, 2023
Although laser ablation of polymers is well investigated the achievable surface quality of this process is limited due to laser-induced structural and morphological defects, arising surface roughness and redeposition of debris.
Visar Demiri   +4 more
doaj   +1 more source

Few-femtosecond resolved imaging of laser-driven nanoplasma expansion

open access: yesNew Journal of Physics, 2022
The free expansion of a planar plasma surface is a fundamental non-equilibrium process relevant for various fields but as-yet experimentally still difficult to capture.
C Peltz   +25 more
doaj   +1 more source

High-Efficiency Copper Removal by Nitrogen Plasma-Assisted Picosecond Laser Processing

open access: yesMicromachines, 2022
Copper (Cu) removal efficiency is a key parameter in the processing of Cu-based electronic devices. Herein, a nitrogen plasma-assisted picosecond (ps) laser process for Cu removal is presented.
Yunfan Li   +9 more
doaj   +1 more source

Characterisation of PMMA/ATH Layers Realised by Means of Atmospheric Pressure Plasma Powder Deposition

open access: yesAdvances in Condensed Matter Physics, 2015
We report on the characteristics of aluminium trihydrate filled poly(methyl methacrylate) composite (PMMA/ATH) coatings realised by plasma deposition at atmospheric pressure. For this purpose, PMMA/ATH powder was fed to a plasma jet where the process and
Lena M. Wallenhorst   +7 more
doaj   +1 more source

Numerical Study on the Influence of the Plasma Properties on the Keyhole Geometry in Laser Beam Welding

open access: yesFrontiers in Physics, 2022
Keyhole laser welding is the benchmark for deep-penetration joining processes. It needs high incident laser beam power densities at the workpiece surface to take place. The gaseous phase plays a fundamental role to keep the deep and narrow keyhole cavity
Donato Coviello   +2 more
doaj   +1 more source

Properties of plasmonic arrays produced by pulsed-laser nanostructuring of thin Au films

open access: yesBeilstein Journal of Nanotechnology, 2014
A brief description of research advances in the area of short-pulse-laser nanostructuring of thin Au films is followed by examples of experimental data and a discussion of our results on the characterization of structural and optical properties of gold ...
Katarzyna Grochowska   +6 more
doaj   +1 more source

Numerical simulation of laser-produced plasma expansion on a droplet surface

open access: yesScientific Reports, 2023
AbstractIn this study, a numerical model of the plasma expansion on a droplet surface based on the initial plasma method was proposed. The initial plasma was obtained through the pressure inlet boundary condition, and the effect of ambient pressure on the initial plasma and adiabatic expansion of the plasma on the droplet surface, including the effect ...
Zhenyu Zhao, Weizhong Li
openaire   +3 more sources

In-Situ Monitoring of Laser Additive Manufacturing for Al7075 Alloy Using Emission Spectroscopy and Plume Imaging

open access: yesIEEE Access, 2021
Most aluminum alloys, especially the 7xxx series, are incompatible with laser additive manufacturing due to many factors. In-situ process monitoring technology offers an excellent opportunity for process understanding and control, which improves the ...
Wenjing Ren   +4 more
doaj   +1 more source

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