title: Enhanced infrared absorption spectra of self-assembled alkanethiol monolayers using the extraordinary infrared transmission of metallic arrays of subwavelength apertures.
abstract: The surface-plasmon-mediated, extraordinary transmission of metallic arrays of subwavelength apertures has been used as the light source for absorption studies of self-assembled monolayers on metal. Enhanced infrared absorption spectra of a sequence of alkanethiol self-assembled monolayers on copper were recorded for carbon chain lengths varying from 8 to 18 atoms. Transition positions and intensities are presented over a large range of the infrared region. The connection between the vibrational modes of the CH(2) wagging progression and the infinite methylene chain is explored using a traditional coupled oscillator approach and a new cluster perspective.
authors.affiliation: Department of Chemistry, The Ohio State University, Columbus, Ohio 43210-1173, USA.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Rodriguez
authors.forename: Summit
authors.initials: S
authors.lastname: Shah
authors.forename: Shaun M
authors.initials: SM
authors.lastname: Williams
authors.forename: Shannon
authors.initials: S
authors.lastname: Teeters-Kennedy
authors.forename: James V
authors.initials: JV
authors.lastname: Coe