2017 - Sustainable Industrial Processing Summit & Exhibition
sips2017-LOGO Symposium Banner sips2017-Banner
22-26 October 2017, Fiesta Americana Condesa Cancun All Inclusive Resort, Cancun, Mexico
Almost 400 Abstracts Submitted from 60 Countries
Summit
Venue
Information
Sponsorship
Submission
Program
Registration
Instructions
Post Summit
Previous Events
spq
iacis1
IOM3
msdg
PLENARY LECTURES AND VIP GUESTS
no_photo

Vitor Oliveira

Instituto Superior de Engenharia de Lisboa

Ultrafast Laser Surface Nanostructuring: Surface Topography, Texture Formation Mechanisms, Surface Properties And Engineering Applications
Marquis International Symposium on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development(3rd Intl Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development)

Back to Plenary Lectures »

Abstract:

Ultrafast lasers allow creating a range of nanoscale surface features that allow controlling important surface properties such as wetting and the friction coefficient. The most important of these surface nanostructures in what concerns potential applications are Laser-induced Periodic Surface Structures (LIPSS), which are surface patterns consisting of parallel ripples oriented perpendicularly to the beam polarization that are produced on materials surfaces by laser treatment with fluences slightly higher than the material ablation threshold and for a few tens of laser pulses. Their period is slightly smaller than the radiation wavelength, typically 500-800 nm for near infrared lasers. The formation of these ripples is usually explained by a periodic modulation of the absorbed radiation intensity due to the interference of the incident laser beam with a surface electromagnetic wave generated by the laser radiation on irregularities of the material's surface, but the mechanisms that the lead to the imprinting of this modulation on the surface were scarcely investigated. In the presentation we will describe results of a study of the mechanisms leading to the imprinting of LIPSS on Ni and Ti surfaces of Ni/Ti multi-layered samples prepared by magnetron sputtering and irradiated with ultrafast laser pulses. The analysis of the multilayer cross-sections by TEM and comparison with molecular dynamics Ni ablation simulations carried out by Zhigilei and co-workers show that, in these metals, the periodic variation of the absorbed radiation intensity leads to a variation of the predominant ablation mechanisms and, consequently, of the ablation rate, thus explaining the rippled surface topography. The influence of these nanostructures on the wettability of Ti and Ti-6Al-4V surfaces and on their ability to affect mesenchymal cells behavior in order to improve osseointegration will be presented as well. Other properties of these surfaces and their potential applications will be discussed.

Distinguished Guests

Prof. Dan Shechtman
2011 Nobel Prize Winner
Member Area

LOGIN

Translate site in 50+ languages
Flogen not responsable for translation
Notebook

<<     April 2024     >>

  • MO
  • TU
  • WE
  • TH
  • FR
  • SA
  • SU
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 1
  • 2
  • 3
  • 4
  • 5




Cancun, Mx Weather


Current Weather Report
Click Here




acs
sdk-logo
mrs-serbia
apmmmperu
gdmb_allg

FLOGEN STAR OUTREACH is a not-for-profit, non-political and all-inclusive science organization that takes no sides in political, scientific or technological debates. We equally welcome, without reservations, all spectrum of ideas, theories, technologies and related debates. Statements and opinions expressed are those of individuals and/or groups only and do not necessary reflect the opinions of FLOGEN, its sponsors or supporters.

foot

SIPS is the flagship event of FLOGEN STAR OUTREACH, a not-for-profit, non-political and all-inclusive science organization. SIPS as well as FLOGEN STARS OUTREACH takes no sides in political, scientific or technological debates. We equally welcome, without reservations, all spectrum of ideas, theories, technologies and related debates. Statements and opinions expressed are those of individuals and/or groups only and do not necessary reflect the opinions of FLOGEN, its sponsors or supporters.


© FLOGEN Star OUTREACH | Home | Contact Us | Privacy Policy | Cancellations/Refund Policy

© Copyright of FLOGEN Stars Outreach Organization: The content of this page including all text and photos are copyright of FLOGEN Stars Outreach and none can be used in their original or in any modified or combined form in any publication, web site or in any other medium whatsoever without prior written permission of FLOGEN Stars Outreach.