Stable and reproducible bilayer lipid membranes based on silicon microfabrication techniques

Ayumi Hirano-Iwata, Azusa Oshima, Yasuo Kimura, Michio Niwano

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this chapter, we will discuss our recent approaches for improving the reproducibility and stability of free-standing bilayer lipid membranes (BLMs) by combining with BLM formation and silicon microfabrication techniques. Membrane formation by the painting method on agarose-gel-coated silicon substrate was monitored with infrared absorption spectroscopy in a multiple-internal reflection geometry. It was demonstrated that the appearance of the C=O stretching modes of phospholipid just after the lipid application can be a measure for the successful and reproducible formation of BLMs with gigaohm seal. For preparation of stable BLMs, we have fabricated a tapered aperture with nanometer-scale smoothness. Owing to this structure, the stress on lipid bilayers at the contact with the septum was minimized, leading to improved membrane stability. Tolerance of the present BLMs to repetitive solution exchanges demonstrates high mechanical stability of the membranes. Such reproducible and stable BLMs will open up variety of applications, including a high-throughput drug screening for ion channels.

Original languageEnglish
Pages (from-to)71-86
Number of pages16
JournalAdvances in Planar Lipid Bilayers and Liposomes
Volume11
Issue numberC
DOIs
Publication statusPublished - 2010 Sep 17

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Bioengineering

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