Bioelectronic silicon nanowire devices using functional membrane proteins

Proc Natl Acad Sci U S A. 2009 Aug 18;106(33):13780-4. doi: 10.1073/pnas.0904850106. Epub 2009 Aug 10.

Abstract

Modern means of communication rely on electric fields and currents to carry the flow of information. In contrast, biological systems follow a different paradigm that uses ion gradients and currents, flows of small molecules, and membrane electric potentials. Living organisms use a sophisticated arsenal of membrane receptors, channels, and pumps to control signal transduction to a degree that is unmatched by manmade devices. Electronic circuits that use such biological components could achieve drastically increased functionality; however, this approach requires nearly seamless integration of biological and manmade structures. We present a versatile hybrid platform for such integration that uses shielded nanowires (NWs) that are coated with a continuous lipid bilayer. We show that when shielded silicon NW transistors incorporate transmembrane peptide pores gramicidin A and alamethicin in the lipid bilayer they can achieve ionic to electronic signal transduction by using voltage-gated or chemically gated ion transport through the membrane pores.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Alamethicin / chemistry
  • Anti-Bacterial Agents / chemistry
  • Bioelectric Energy Sources*
  • Electrochemistry / methods
  • Gramicidin / chemistry
  • Hydrogen-Ion Concentration
  • Ion Channels / chemistry
  • Ligands
  • Lipid Bilayers / chemistry
  • Metal Nanoparticles / chemistry*
  • Models, Chemical
  • Nanotechnology / methods
  • Nanowires
  • Signal Transduction
  • Silicon / chemistry*

Substances

  • Anti-Bacterial Agents
  • Ion Channels
  • Ligands
  • Lipid Bilayers
  • Gramicidin
  • Alamethicin
  • Silicon