title: The brass light pipe: an easy way to obtain infrared spectra of liquid films and monolayers.
abstract: We describe a brass light pipe (LP) mounted in a cylindrical optical accessory for attenuated total reflection (ATR) that can be used to readily obtain the infrared spectra of liquids and monolayers. As examples, we show the LP spectra of isooctane, decane, dimethyl malonate, dodecanol, dodecanethiol, and acetic acid and compare them to those obtained by transmission as well as by ATR. In addition, we utilize a dodecanethiol monolayer spectrum to illustrate the sensitivity of the LP scheme.
authors.affiliation: Département de Physique et Département de Chimie-Biologie, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada, G9A 5H7.
authors.forename: Pascal
authors.initials: P
authors.lastname: Larouche
authors.forename: Jean-Joseph
authors.initials: JJ
authors.lastname: Max
authors.forename: Camille
authors.initials: C
authors.lastname: Chapados