| 초록 |
The adverse biological effects and flammability of many organic vapors can be a critical issue for personal health and safety. Liquid crystals (LCs) are characterized by long-range orientational order giving them anisotropic optical properties, but the order can be tuned or even removed by environmental stimuli such as temperature increase or the diffusion of organic vapor. Such a change can be made easily visual by introducing the liquid crystal into a polymer matrix, typically in polymer-dispersed liquid crystals (PDLCs), which can change between scattering and transparent by applying an electric field. We introduce a new concept for an optical read-out gas sensor based on similar principles but where the LC is encapsulated within polymer micro- or nanofibers produced by electrospinning. The produced LC-functionalized mats show a fast response, easily detectable by the naked eye, under the exposure of organic vapors. |
