Micropatterning of block copolymer micelle thin films using solvent capillary contact printing

Wonseok Hwang, Moon Ho Ham, Byeong Hyeok Sohn, June Huh, Yong Soo Kang, Wonyong Jeong, Jae Min Myoung, Cheolmin Park

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

This paper describes a new and facile method, 'solvent capillary contact printing (SCCP)', that fabricates micro-patterned hydrophilic/hydrophobic surface caused by the selective manipulation of nanometre-scale block copolymer micelles. The method is based on using capillary injection and evaporation of a solvent, which is preferential to a core block of micelles, through poly(dimethylsiloxane) (PDMS) microchannels placed on a pre-formed block copolymer micelle monolayer. We produced well-defined surface micropatterns where a nanostructure consisting of core-opened micelles gave rise to hydrophilic surface property in the regions in contact with solvent while one consisting of hemispherical micelles remained hydrophobic in the regions contacted by the PDMS mould. Our method allows repetitive micropatterning; a surface micropattern previously formed is simply erased by exposure of preferential solvent vapour due to reversible structure modification of micelles. Furthermore, SCCP with various metal salts, precursors of metal nanoparticles, enables us to fabricate micropatterned arrays of well-separated metal nanoparticles which can be used as a catalyst for synthesizing nanowires. The micropatterned arrays of GaN nanowires are demonstrated, fabricated by SCCP.

Original languageEnglish
Pages (from-to)2897-2902
Number of pages6
JournalNanotechnology
Volume16
Issue number12
DOIs
Publication statusPublished - 2005 Dec 1

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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