Surface enhanced FTIR spectroscopy and surface plasmon resonance on biomembranes

Gerald Steiner*, Reiner Salzer, Wolfgang Fischer, Christian Kuhne

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Lipid bilayers containing the nicotinic acetylcholine receptor were investigated by attenuated total reflection (ATR) FTIR spectroscopy and by surface plasmon resonance (SPR). FTIR-ATR spectra reveal structural details of the transmembrane protein. Surface enhanced infrared absorption (SEIRA) provides access to structural details in the close vicinity of the surface of the ATR crystal. Information about the abundance of protein substructures as well as about the orientation of those substructures are obtained. SPR was applied in order to detect changes within the adsorbed biomembrane during admission of a neurotransmitter as acetylcholine. Switching of the ion channel was successfully observed by SPR. This result is a step forward towards highly selective biosensors and bioactuators.

Original languageEnglish
Pages (from-to)215-221
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2000
EventBiomedical Spectroscopy: Vibrational Spectroscopy and other Novel Techniques - San Jose, CA, USA
Duration: 26 Jan 200027 Jan 2000


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