Sub-micrometer adhesion modulation on polymer surfaces containing gratings produced by two-beam interference

M. Csete, N. Kresz, Cs Vass, G. Kurdi, Zs Heiner, M. Deli, Zs Bor, O. Marti

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Grating-like structures having a period of 416 nm were produced on the surface of poly-carbonate films by two-beam interference realized by the fourth harmonic of Nd:Yag laser. The period of the structures was half of that the applied master grating, the ratio of the width of the valleys to the period was tuned by the intensity, the depth of the modulation was increased by the number of laser pulses. Pulsed force mode atomic force microscopy was applied to study the topography and the adhesion on structured surfaces with sub-micrometer resolution. The adhesion modulation caused by the topography was calculated along line cross-sections of the AFM pictures taking into account the tip and surface geometry. The separation of the effects of the topography and the laser-induced material changes proved that the adhesion is increased at the areas illuminated by laser beam having a fluence above the melting threshold. The laser-induced material changes cause an additional adhesion increase at the valleys of the structure. It was shown that the adherence of albumin results in dense packing on poly-carbonate surface parts having sub-micrometer periodic adhesion modulation.

Original languageEnglish
Pages (from-to)813-819
Number of pages7
JournalMaterials Science and Engineering C
Volume25
Issue number5-8
DOIs
Publication statusPublished - Dec 1 2005

Keywords

  • Adhesion
  • Atomic force microscopy
  • Laser-induced grating

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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