کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7921585 | 1511750 | 2018 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface modified solution-derived lanthanum-doped zinc oxide film for nematic liquid crystal system with free residual DC voltage
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The liquid crystal (LC) alignment characteristics of the solution-derived lanthanum-doped zinc oxide (La:ZnO) film with ion-beam (IB) irradiation were investigated as a function of curing temperature. The best LC alignment state with uniform and homogeneous alignment was achieved at a curing temperature of 300â¯Â°C. To observe the effect of the IB irradiation on the La:ZnO film, physical and chemical surface analyses were conducted. Atomic-force microscopy revealed that surface roughness was increased, and the leptokurtic surface was changed to a platykurtic surface after the IB irradiation. X-ray photoelectron spectroscopy showed the breakage of the metal-oxide bonds, which induced an increase of oxygen vacancies. This caused van der Waals force, which strongly anchored LC molecules to the La:ZnO film. These results indicated that uniform and homogeneous LC alignment with the solution-derived La:ZnO films was induced by physical and chemical surface modification due to the IB irradiation. Moreover, residual DC was characterized by a capacitance-voltage hysteresis curve and nearly zero hysteresis was achieved. Therefore, IB irradiation is a useful method to achieve uniform and homogenous LC alignment, and using it with the solution-derived La:ZnO film exhibited potential for high-quality LC applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 213, 1 July 2018, Pages 383-388
Journal: Materials Chemistry and Physics - Volume 213, 1 July 2018, Pages 383-388
نویسندگان
Ju Hwan Lee, Eun-Mi Kim, Gi-Seok Heo, Hae-Chang Jeong, Dong Hyun Kim, Dong Wook Lee, Jeong-Min Han, Tae Wan Kim, Dae-Shik Seo,