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Identifier 000409510
Title Ultrashort -pulse laser fabrication of biomimetic metallic surfaces
Alternative Title Κατασκευή βιομιμητικών επιφανειών με υπερβραχείς παλμούς laser
Author Μιμίδης, Αλέξανδρος
Thesis advisor Στρατάκης, Εμμανουήλ
Κιοσέογλου, Γεώργιος
Abstract The aim of this thesis is the experimental investigation of structuring metallic surfaces with linearly polarized Gaussian femtosecond laser pulses, in order to achieve controllable surface modification. Steel samples were irradiated with a focused ultra-short laser pulses and the morphology was studied as a function of fluence and number of pulses. Laser Induced Surface Structures (LIPSS) were structured on the sample surfaces following irradiation with tunable micro periodicity. A complete study was conducted investigating LIPPS periodicity as a function of wavelength, fluence angle of incidence and number of pulses. Furthermore large areas were fabricated with laser scanning method achieving each type of morphology observed for every type of steel. This work was conducted by irradiating samples a) in air and b) immersed in water, comparing results. Finally, wetting properties of the surfaces were investigated with i) water droplets ii) oil droplets and compared to the flat surface showing an increase in both water repellency and slight oil repellency.
Language English
Issue date 2017-07-21
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Materials Science and Technology--Post-graduate theses
  Type of Work--Post-graduate theses
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