Photoelectric response of polarization sensitive bacteriorhodopsin films

Qun Li, Jeffrey A. Stuart, Robert R. Birge, Jian Xu, Andrew Stickrath, Pallab Bhattacharya

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Polarization sensitivity is introduced into oriented bacteriorhodopsin (BR) films through a photochemical bleaching process, which chemically modifies the structure of the purple membrane by breaking the intrinsic symmetry of the membrane-bound BR trimers. The resulting photovoltage generated in an indium-tin oxide (ITO)/BR/ITO detector is found to be anisotropic with respect to cross-polarized probe beams. A model, based on the polarization dependent photoselection of the BR molecules qualitatively explains the photochemical bleaching process and the observed anisotropic response. The effect reported here can be used to construct a polarization sensitive BR-based bio-photoreceiver.

Original languageEnglish (US)
Pages (from-to)869-874
Number of pages6
JournalBiosensors and Bioelectronics
Issue number8
StatePublished - Mar 15 2004

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry


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