Tilted Orientation of Photochromic Dyes with Guest-Host Effect of Liquid Crystalline Polymer Matrix for Electrical UV Sensing
| Autor: | Jun-Chan Choi, Min-Kyu Park, Hak-Rin Kim, Ji-Sub Park, Amid Ranjkesh, Sung-Hoon Kim, Do Hyuk Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
spirooxazine (SO) medicine.disease_cause lcsh:Chemical technology Biochemistry Capacitance Article Analytical Chemistry Photochromism Planar Liquid crystal medicine guest-host effect lcsh:TP1-1185 liquid crystal Electrical and Electronic Engineering Instrumentation UV-sensing photochromic dye metal-insulator-metal (MIM) structure chemistry.chemical_classification business.industry Polymer Atomic and Molecular Physics and Optics Dipole chemistry Optoelectronics business Layer (electronics) Ultraviolet |
| Zdroj: | Sensors, Vol 16, Iss 1, p 38 (2015) Sensors; Volume 16; Issue 1; Pages: 38 SENSORS(16): 1 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | We propose a highly oriented photochromic dye film for an ultraviolet (UV)-sensing layer, where spirooxazine (SO) derivatives are aligned with the liquid crystalline UV-curable reactive mesogens (RM) using a guest-host effect. For effective electrical UV sensing with a simple metal-insulator-metal structure, our results show that the UV-induced switchable dipole moment amount of the SO derivatives is high; however, their tilting orientation should be controlled. Compared to the dielectric layer with the nearly planar SO dye orientation, the photochromic dielectric layer with the moderately tilted dye orientation shows more than seven times higher the UV-induced capacitance variation. |
| Databáze: | OpenAIRE |
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