| AVS 54th International Symposium | |
| Plasmonics Topical Conference | Tuesday Sessions |
| Session PL+BI-TuM |
| Session: | Plasmon-mediated Sensing and Biosensing |
| Presenter: | J.V. Coe, The Ohio State University |
| Authors: | J.V. Coe, The Ohio State University K.R. Rodriguez, The Ohio State University S. Teeters-Kennedy, The Ohio State University H. Tian, The Ohio State University J.M. Heer, The Ohio State University |
| Correspondent: | Click to Email |
The surface plasmon (SP) mediated, extraordinary transmission of metal arrays of subwavelength holes has been moved into the infrared (IR) region in order to overlap with the traditional range of molecular vibrations. SP-enhanced IR absorption spectra are recorded (using standard FTIR instrumentation) of metal-supported self-assembled alkanethiol monolayers, phospholipid bilayers, gramicidin (an antibiotic peptide) and cholesterol in phospholipid bilayers, as well as hexadecane thin films. The interaction of a SP resonance and a vibrational excited state has been examined by tuning a SP resonance (both by film thickness and angle of the mesh) through the primary rocking vibration of the hexadecane molecule producing vibrational band intensity changes, peak shifts, and lineshape changes. The nature of the enhancements will be discussed.