par Calò, Annalisa;Stoliar, Pablo;Cavallini, Massimiliano;Geerts, Yves 
;Biscarini, Fabio
Référence Review of scientific instruments, 81, 3, page (033907)
Publication Publié, 2010
;Biscarini, FabioRéférence Review of scientific instruments, 81, 3, page (033907)
Publication Publié, 2010
Article révisé par les pairs
| Résumé : | We describe a setup suitable for simultaneously measuring optical and electrical properties of a liquid crystal mesophase upon temperature variation, and the difference in the order parameters between the bulk and the interface with the substrate. It integrates high-resolution polarized light optical microscopy, temperature regulation, and electrical measurements in a controlled atmosphere with a software kernel that controls the instruments and synchronizes the data streams. A user-friendly interface allows us to program multistep experiments controlling all the instruments and data acquisition by a specifically designed scheduler. We tested our system on a thin film of alkoxy-substituted phthalocyanines deposited on a test pattern with interdigitated electrodes. We studied the optical and electrical behavior in the proximity of the bulk phase transition to isotropic liquid, identifying a few ordered monolayers anchored to the substrate above the transition temperature. |
