par Calò, Annalisa;Stoliar, Pablo;Cavallini, Massimiliano;Geerts, Yves
;Biscarini, Fabio
Référence Review of scientific instruments, 81, 3, page (033907)
Publication Publié, 2010

Référence 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. |