On the formation of laser induced self-organizing nanostructures

Gerardus Richardus, Bernardus, Engelina Römer, Bert Huis in 't Veld, M.H.A. Huis in 't Veld, J. Meijer, M.N.W. Groenendijk

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Abstract

Laser induced self-organizing rippled nanostructures on steel are formed by femtosecond laser pulses. They are applied as hydrophobic surfaces. A low fluence results in ‘regular ripples’ with a spatial repetition of 300–500 nm, orientated perpendicular to the laser polarization direction. In twinned areas ‘pre-ripples’ with much smaller wavelength (about 150 nm) are observed, with a different orientation. We found indications that the energy absorption depends on the crystal orientation and that pre-ripples are only formed at very low fluence. Pre-ripples initiate on secondary carbides or on grain boundaries. At higher energy, regular ripples initiate in areas with pre-ripples; at even increasing fluence disordered structures are obtained.
Original languageUndefined
Pages (from-to)201-204
JournalCIRP annals : manufacturing technology
Volume58
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • IR-73038
  • Laser micromachining
  • Steel
  • Nano manufacturing
  • METIS-257949

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