Dresden 2009 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 21: Topical Session Nanoporous Functional Materials - Poster
MM 21.7: Poster
Tuesday, March 24, 2009, 14:45–16:30, P4
Dynamics and Structure of n-Nonanol Confined in Silicon Nanochannels — •Christoph Schuhmacher, Rene Berwanger, and Rolf Pelster — Universität des Saarlandes, Saarbrücken, Germany
The behavior of the short n-alcohol C9H19OH as bulk material and confined in tubular meso-pores of porous silicon has been studied by infrared spectroscopy. The porous silcicon samples were prepared by electrochemical etching and the mean pore-radius was varied from r=3 nm to r=15 nm. Therefore, we are able to study the influence of geometrical confinement on the liquid-crystalline phase transition. We use several vibrations to determine the transition temperatures, for exemple the OH-stretching vibration, the CH2 scissor vibration or the vibration of the C-C-backbone. We also discuss differences in the crystalline structure of bulk and confined C9H19OH.