Controlling the morphology of gold films on poly(dimethylsiloxane)

Oliver Graudejus, Patrick Görrn, Sigurd Wagner

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

Gold films on poly(dimethylsiloxane) (PDMS) have applications in stretchable electronics, tunable diffraction gratings, soft lithography and as neural interfaces. The electrical and optical properties of these films depend critically on the morphology of the gold. Therefore, we examine qualitatively and quantitatively the factors that affect the morphology of the gold film. Three morphologies can be produced controllably: microcracked, buckled, and smooth. Which morphology a gold film will adopt depends on the film stress and the growth mode of the film. The factors that affect the film stress and growth mode, and thus the morphology, are as follows: deposition temperature, film thickness, elastic modulus, adhesion layer thickness, surface properties of the PDMS, and mechanical prestrain applied during deposition. We discuss how the different components of the film stress and growth mode of the film affect the morphology.

Original languageEnglish (US)
Pages (from-to)1927-1933
Number of pages7
JournalACS Applied Materials and Interfaces
Volume2
Issue number7
DOIs
StatePublished - Jul 28 2010

Keywords

  • flexible electronics
  • gold
  • stress elastomers
  • thin films

ASJC Scopus subject areas

  • Materials Science(all)

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