Growth of thin Al2O3 films on biaxially oriented polymer films by atomic layer deposition

Mika Vähä-Nissi, E. Kauppi, K. Sahagian, L.-S. Johansson, Soledad Peresin, Jenni Sievänen, Ali Harlin

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

The effects of thin film nucleation and initial growth on roughness, chemistry and thermomechanical properties of polymer film surfaces were studied. Al2O3 was deposited onto commercial biaxially oriented polypropylene and polylactic acid films at 80 °C by using atomic layer deposition technique. Both substrates, especially the more hydrophobic polypropylene, showed initial growth through Al2O3 clusters. There was a faster deposition of Al2O3 on polylactic acid film than on polypropylene at the early stages of the Al2O3 deposition. There were also indications of chemical interactions between polylactic acid and trimethyl aluminum used as a precursor for Al2O3. Changes in the thermo-mechanical properties of the polymer surfaces with Al2O3also evidenced the differences between the substrate polymer films. The near surface interphase formed in polylactic acid probably contributed to the strong increase and scattering in the softening temperature during the early thin film growth
Original languageEnglish
Pages (from-to)50 - 57
JournalThin Solid Films
Volume522
Issue numberNovember
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • Aluminum oxide
  • atomic force microscopy
  • atomic layer deposition
  • characterization
  • growth
  • thin film
  • transition temperature microscopy
  • x-ray photoelectron spectroscopy

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