Patterning of ultrathin polymethylmethacrylate films by in-situ photodirecting of the Marangoni flow

Roman Elashnikov, Premysl Fitl, Vaclav Svorcik, Oleksiy Lyutakov

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Laser heating and Marangoni flow result in the formation of surface structures with different geometries and shape on thin polymer films. By laser beam irradiation combined with a sample movement the solid polymethylmethacrylate (PMMA) films are heated and undergo phase transition which leads to a material flow. Since the laser beam has a non-linear distribution of energy, the PMMA film is heated inhomogeneously and a surface tension gradient in a lateral direction is introduced. During this procedure additional phenomena such as “reversible” or cyclic polymer flow also take place. The careful choice of experimental conditions enables the preparation of patterns with sophisticated geometries and with hierarchical pattern organization. Depending on initial PMMA film thickness and speed of the sample movement line arrays are created, which can subsequently be transformed into the crimped lines or system of circular holes. In addition, the introduction of a constant acceleration in the sample movement or a laser beam distortion enables the preparation of regularly crimped lines, ordered hexagonal holes or overlapped plates.

Original languageEnglish
Pages (from-to)562-568
Number of pages7
JournalApplied Surface Science
Volume394
DOIs
Publication statusPublished - 1 Feb 2017
Externally publishedYes

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Keywords

  • Laser beam writing
  • Marangoni flow
  • Patterning
  • Polymer

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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