Permanent Bubble Arrays from a Cross-Linked Poly(para-phenyleneethynylene): Picoliter Holes without Microfabrication

Belma Erdogan, Lulu Song, James N. Wilson, Jung O. Park, Mohan Srinivasarao, Uwe H.F. Bunz

Research output: Contribution to journalArticle

125 Scopus citations


An azide-substituted poly(para-phenyleneethynylene) (PPE) 4 was prepared by the Heck?Cassar?Sonogashira?Hagihara method. Thin films of 4 form self-assembled bubble arrays from carbon disulfide solution utilizing the breath figure method. The as-formed porous films of 4 are soluble in common solvents, and the air bubbles are interconnected. Upon heating to 300 °C, 4 cross-links and the thin film turn into insoluble matrix with isolated bubbles. The cross-linking process has transformed the bubble arrays of 4 into insoluble picoliter beakers or picoliter vials, whose diameters are approximately 3.0 and 1.5 μm at the top and bottom, respectively.

Original languageEnglish (US)
Pages (from-to)3678-3679
Number of pages2
JournalJournal of the American Chemical Society
Issue number12
StatePublished - Mar 31 2004


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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