Surface-Plasmon-Mediated IR Transmission of Metal Microarrays for the

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Presentation transcript:

Surface-Plasmon-Mediated IR Transmission of Metal Microarrays for the Molecules of the Cell Membrane Surface Plasmon Basics Enhanced IR Absorption Spectroscopy DPPC, Cholesterol, Gramicidin Shaun M. Williams, Kenneth R. Rodriguez, Shannon Teeters-Kennedy, Katherine Cilwa, Dan Meleason, Summit Shah, Alexandra Sudnitsyn, Frank Hrovat, Smruti Patel, and James V. Coe OSU International Molecular Spectroscopy Symposium, June 21, 2005, Columbus OH

Shannon Teeters- Kennedy Coe Group Shaun Williams Kenneth Rodriguez Shannon Teeters- Kennedy Katie Cilwa Dan Meleason CHE0413077 Jim Coe (PI) Summit Shah Alexandra Sudnitsyn Frank Hrovat Smruti Patel 38502-ACS Matt Young Mandy Stafford Sarah Bishop Ushani Lincoln Kerry Katz Keith Zomchek Trisha Rogers

Ni Mesh Shiny Side Dull Side 12.7mm 6.5mm 6.5mm 3 mm thick Precision Eforming, LLC 839 Route 13 Cortland, NY 13045 Email Sales Phone: (607) 753-7730 Fax: (607) 753-7680 6.5mm 6.5mm 3 mm thick Dull Side

Ebbesen’s Extraordinary Transmission1 Effect in the IR SEM of Precision Eforming Ni Mesh 12.7mm 6.5mm 6.5mm 5 mm thick 1 Ebbesen, T.W., Lezec, H.J., Ghaemi, H.F., Thio, T. and Wolff, P.A. Nature, 391 (1998) 667. 2 Bethe, H.A. Phys. Rev, 66 (1944) 163. Williams et al., J. Phys. Chem. B 107 11871-79 (2003)

12.7mm 6.5mm 6.5mm 5 mm thick Larson

IR h

_ + + _ Glycerol subunit double bond cholesterol DPPC 1-palmitoyl-2-oleoyl-PC 1,2-di-palmitoyl-glycero-3 phosphocholine 16:0/18:1 16:0/16:0

Self Assembled Photonic Crystals metal S S S S S S S S S metal S S S S S S S S Self Assembled Photonic Crystals

S S S S S S S S S S metal S S S S S S metal S S S S S S S S S S S S

S S S S S S S S S S metal S S S S S S metal S S S S S S S S S S S S

SAMs Self-Assembled Monolayers

Alkanethiolate SAMS 10 mm FTIR transmission spectra of a Cu-deposited mesh (dotted, upper trace) upon coating with a SAM of 1-dodecanethiol (solid, black trace). Williams et al., Nanotechnology, 15 S495-S503 (2004)

CH2 Wagging Progressions Ratio to RAIRS (Laibinis et al JACS ’91, 85o incident, 18o tilt, 2.2 nm thick)  16 m pathlength Rodriguez et al., J. Chem. Phys. 121 8671-75 (2004)

More Complex Assemblies for Sensors and Nanotechnology

S S S S S S S Williams et al., Nanotechnology, 15 S495-S503 (2004) Transmission spectra of a bare Cu-deposited mesh (top tace) that was coated with a hexadecanethiol SAM (middle) and then further coated with a DPPC phospholipid bilayer (bottom). Note the shift in transmission resonances (analogous to ATR) and the appearance of molecular absorptions (circled) upon coating. Williams et al., Nanotechnology, 15 S495-S503 (2004)

DPPC metal glycerol chiral carbon trilayer monolayer

DPPC:Cholesterol

Membrane Bound Protein - Gramicidin crystal membrane

C=O stretch, 16 different stretches, Amide I bands

Williams et al., Nanotechnology, 15 S495-S503 (2004) PM3 optimized Gramicidin A monomer (membrane structure). 15 amino acids, alternating L and D, coil into a nanochannel. A single-stranded, helical dimer (HD) spans a membrane allowing ion transport. O atoms (dark) of C=O groups line the ion channel. Williams et al., Nanotechnology, 15 S495-S503 (2004)

Molecules of the Cell Membrane Summary: Enhanced IR Absorption Spectroscopy Phase of DPPC in Bilayers Cholesterol Membrane Bound Protein - Gramicidin Stacked Sensors