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SYEC: Symposium Lasers and Photonic Technologies for Environmental Challenges

SYEC 1: Laser-Based Micro-/Nanostructuring for Environmental Challenges

SYEC 1.3: Talk

Tuesday, February 27, 2024, 12:10–12:25, ELP 6: HS 1

Ultrashort pulse laser surface nanostructuring and its application — •Pierre Lorenz, Joachim Zajadacz, Martin Ehrhardt, and Klaus Zimmer — Leibniz-Institut für Oberflächenmodifizierung, Leipzig, Deutschland

Ultrashort pulse laser radiation can be used to irradiate metal surfaces and create self-organized micrometer and nanostructured surfaces. The surface morphologies depend on various laser parameters, including laser power, scan speed, wavelength, and repetition rate. In addition, the nanostructures can be transferred to an arylate surface using UV nanoimprint lithography (UV-NIL). The directly lasered or molded surfaces exhibit interesting optical, electrical, and fluidic properties. For example, laser-assisted nanostructuring of copper surfaces allows the fabrication of Cu surfaces with adjustable secondary electron yield. Similarly, laser-assisted nanostructuring of stainless steel surfaces allows the water contact angle to be adjusted from superhydrophobic to superhydrophilic. In addition, the forming of nanostructured surfaces allows the production of surfaces with adjustable optical reflectance. This presentation provides an overview of laser-assisted nanostructuring of surfaces and its applications.

Keywords: Laser; nanoimprint lithography; laser-assisted nanostructuring; secondary electron yield; Ultrashort pulse laser