Substrate-membrane interactions: Mechanisms for imposing patterns on a fluid bilayer membrane

Jay T. Groves, Nick Ulman, Paul S. Cremer, Steven G. Boxer

Research output: Contribution to journalArticle

131 Scopus citations

Abstract

A variety of new techniques are emerging that require the use of a patterned substrate to impose micropartitions on a supported fluid bilayer membrane. The barrier-forming characteristics of aluminum oxide, indium-tin oxide (ITO), chrome, and gold patterns on silica substrates have been examined. All four materials form effective barriers to lateral diffusion within the supported membrane; however, two distinctly different mechanisms were observed. Aluminum oxide inhibits vesicle fusion, thus restricting membrane formation to the exposed silica surface. In contrast, vesicles will fuse with ITO, chrome, and, to some extent, gold: however, the resulting membrane is effectively immobile over the time scale of several hours. These materials partition the supported membrane by selectively immobilizing membrane that adsorbs to their surface. The two mechanisms of membrane partitioning described here provide additional flexibility in the design and application of micropatterned membranes.

Original languageEnglish (US)
Pages (from-to)3347-3350
Number of pages4
JournalLangmuir
Volume14
Issue number12
DOIs
StatePublished - Jun 9 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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