Abstract
With the use of a thermostated grazing incidence reflection (GIR) infrared cell, spectra of organic monolayers and thin polymer films have been obtained as a function of temperature. Results indicate that insight into the mechanism of molecular reorganization which often occurs at elevated temperatures can be obtained through thermal cycling experiments. In particular, studies of ultrathin poly(methylmethacrylate) [PMMA] films as a function of temperature reveal the onset of molecular segmental motion known to occur at the glass transition temperature, <i>T</i><sub>g</sub> (~100°C). Similarly, in Langmuir-Blodgett (L-B) monolayers of cadmium arachidate (CdA), GIR measurements indicate that a two-stage disordering process occurs with increasing temperature. Pretransitional disordering of the hydrocarbon tails may be a contributing factor to the onset of the thermal melting point.
PDF Article
More Like This
RF sputtered amorphous chalcogenide thin films for surface enhanced infrared absorption spectroscopy
F. Verger, V. Nazabal, F. Colas, P. Němec, C. Cardinaud, E. Baudet, R. Chahal, E. Rinnert, K. Boukerma, I. Peron, S. Deputier, M. Guilloux-Viry, J.P. Guin, H. Lhermite, A. Moreac, C. Compère, and B. Bureau
Opt. Mater. Express 3(12) 2112-2131 (2013)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription