Calò Annalisa, Stoliar Pablo, Cavallini Massimiliano, Geerts Yves H, Biscarini Fabio
CNR-Institute for the Study of Nanostructured Materials, Via Gobetti 101, I-40129 Bologna, Italy.
Rev Sci Instrum. 2010 Mar;81(3):033907. doi: 10.1063/1.3327820.
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.
我们描述了一种装置，适用于在温度变化时同时测量液晶中间相的光学和电学性质，以及本体与基板界面之间序参量的差异。它将高分辨率偏振光光学显微镜、温度调节和电学测量集成在可控气氛中，并带有控制仪器和同步数据流的软件内核。用户友好的界面使我们能够通过专门设计的调度器对多步实验进行编程，控制所有仪器和数据采集。我们在沉积在带有叉指电极的测试图案上的烷氧基取代酞菁薄膜上测试了我们的系统。我们研究了在本体向各向同性液体转变附近的光学和电学行为，发现在转变温度以上有一些有序的单层锚定在基板上。
