奈米元件之製作、應用與其物理性質之研究

The Study in Fabrications, Applications and Physical Properties of Nanodevices

陳培翔(Pei-Shiang Chen)

指導教授 ： 趙治宇

國立臺灣大學/理學院/物理研究所/博士(2009年)

https://doi.org/10.6342/NTU.2009.00648

摘要

在這篇論文我們用三個主題來討論奈米元件的製作、應用與其物理性質。第一個主題是”使用複製成形法來製作無配向層的可撓式液晶顯示元件”。可撓式液晶顯示器是當前非常熱門的研究。很多種方法已經被使用於製作可撓式液晶顯示器。在此主題，我們使用複製成形法製造可撓式液晶顯示元件並且使用聚二甲基矽氧烷來製作基板而非使用一般的塑膠。在此，聚二甲基矽氧烷本身除了是可撓式液晶顯示器的基板外亦為其配向層；因此這可撓式基板不需要額外的外加配向層。從我們結果證明了使用複製成形法可成功增加可撓式液晶元件的彎曲性。此外相較於一般傳統製程，此方法可以減少製作元件的步驟。這兩項優點增加了可應用的範疇並減少了製作的成本。
第二個主題是”常溫下利用液晶輔助複製成形法於有圖形之高分子來排列單軸分子”。在複製成形的過程中，由於液晶分子被柵狀溝槽排向因而將單軸分子排向。為了驗證我們的實驗，我們量測了光致發光譜和偏振吸收光譜來量化分子排列的程度。這種常溫下利用液晶輔助複製成形法於有圖形之高分子來排列單軸分子的方法開啟了一個簡易的路來製造光電和電子元件。
最後一個主題是”使用直接剝撕法製造高深寬比之奈米毛結構”。在此主題，我們使用了一個超快速、簡單和低成本的方法 - 直接剝撕法 - 30秒內在聚全氟乙丙烯薄膜上製造高深寬比的奈米毛結構。擁有奈米毛結構的聚全氟乙丙烯薄膜呈現出令人驚艷的超疏水和自我清潔性質；聚全氟乙丙烯它本身的可撓性性質配合上述所描述的特性將能使其運用在太陽能電池與生物和科技領域的有弧度元件上。

關鍵字

可撓式液晶顯示器 ； 複製成形 ； 液晶分子導向 ； 直接剝撕 ； 奈米毛 ； 超疏水 ； 深寬比

並列摘要

There are three topics to discuss the study in fabrications, applications and physical properties of nanodevices in this dissertation. The first one is “Fabricating Alignment-layer Free Flexible Liquid Crystal Devices by Replica Molding Method”. Flexible liquid crystal display (LCD) has become a popular topic nowadays. Many kinds of processes have been used to make flexible LCDs. In this topic, we fabricate a flexible LC device by replica molding method – using Poly(dimethylsiloxane) (PDMS) rather than plastic to be the substrate. Here, the PDMS acts not only as the substrate but also the alignment-layer in the flexible LCD; thus there is no need to coat additional alignment-layer on the flexible substrates. According to our results, we have successfully increased the flexibility of rollable LC devices via replica molding method. Also, fewer fabrication steps are needed as compared with other conventional processes. These two achievements can increase the range of applications and reduce the cost of the manufacturing process.
The second topic is “Liquid Crystal Assisted Replica Molding Method to Align Uniaxial Molecules in Patterned Polymer at Ambient Temperature”. In this topic, we demonstrate an easy approach - liquid crystal assisted replica molding method - to align uniaxial molecules in a patterned polymer at ambient temperature. During the replica molding process, the orientation of liquid crystals was parallel to the groove of the grating and the uniaxial molecules were aligned by liquid crystals. In order to confirm our observations, we had measured photoluminescence (PL) and polarized absorption spectra to quantify the degree of alignment. This approach to align uniaxial molecules in a polymer at ambient temperature opens up a simple way to manufacture optoelectronic and electronic devices.
The last topic is “Fabricating High Aspect Ratio Nanohair Structures by Direct Peeling Method”. In this topic, we present an ultra-fast, simple and cost-effective way – the direct peeling method (DPM) – to produce nanohairs with high aspect ratio on fluorinated ethylene propylene (FEP) films within 30 seconds. The FEP films with nanohair structures afford impressive demonstrations of superhydrophobicity and self-cleaning effect; the characteristics described above along with the flexibility of FEP may prove useful for solar cells and curved components in the field of biological and technological applications.

並列關鍵字

flexible LCD ； replica molding ； liquid crystals ； molecular orientation ； direct peeling ； nanohair ； superhydrophobic ； aspect ratio

參考文獻

19.I. O. Shklyarevskiy, P. Jonkheijm, N. Stutzmann, D. Wasserberg, H. J. Wondergem, P. C. M. Chiristianen, A. P. H. Schenning, D. M. Leeuw, Z. Tomovic´, J. Wu, K. Mullen, and J. C. Mann, J. Am. Chem. Soc. 127, 16233 (2005).

10.I. O. Shklyarevskiy, P. Jonkheijm, N. Stutzmann, D. Wasserberg, H. J. Wondergem, P. C. M. Chiristianen, A. P. H. Schenning, D. M. Leeuw, Z. Tomovic´, J. Wu, K. Mullen, and J. C. Mann, J. Am. Chem. Soc. 127, 16233 (2005).

34.Y. T. Cheng, D. E. Rodak, C. A. Wong, and C. A. Hayden, Nanotechnology 17, 1359 (2006).

5.Y. T. Cheng, D. E. Rodak, C. A. Wong, and C. A. Hayden, Nanotechnology 17, 1359 (2006).

31.G. Xie, G. Zhang, F. Lin, J. Zhang, Z. Liu, and S. Mu, Nanotechnology 19, 095605 (2008).