本研究的目的在於製備同時具有超疏水自潔及抗反射性質的奈米粒子薄膜。運用靜電吸附機制，以浸鍍機在玻璃基板上交替地逐層組裝帶正電荷的聚電解質和帶負電荷的雙尺寸二氧化矽奈米粒子。藉由控制奈米粒子的浸鍍時間及沉積層數，使表面達到足夠的粗糙度，經煅燒，再配合矽烷自組裝單分子層技術，製作出透明的超疏水薄膜，有別以往只具有超疏水自潔但不透明的薄膜。實驗結果顯示，薄膜的平均穿透度及接觸角遲滯會隨層數以及奈米粒子浸鍍時間的增加而減小，但是接觸角則會隨層數以及奈米粒子浸鍍時間的增加而增大。最適化的沉積條件為浸鍍時間15分鐘，沉積層數30層。此外，奈米粒子薄膜在自組裝矽烷單分子層之前，具有超親水性，因此，也提供了透明表面上超親水/超疏水圖案化的可能性。本研究也製作單一尺寸之奈米粒子薄膜作為比較，發現單一尺寸的奈米粒子薄膜在多功能特性的表現上，不及雙尺寸奈米粒子薄膜。

Self-cleaning and antireflective properties were combined and improved by arranging two-sized silica nanoparticles into structures on glass substrates by electrostatic layer-by-layer assembly in this work. Poly(allylamine hydrochloride) and negatively charged two-sizes SiO2 nanoparticles are assembled sequentially by using a dip coater. Surface roughness required for superhydrophobicity has been achieved by controlling the dipping time and bilayer number. A transparent superhydrophobic film was finally created by calcinations and surface silanization. The experimental results indicated that both light transmittance and contact angle hysteresis decrease with the increase of the dipping time and bilayer number on one hand, the contact angle increases with the increasing of dipping time and bilayer number on the other hand. An optimal assembly condition was found to be 15 min dipping time and 30 bilayers. Furthermore, the assembled films were found to exhibit superhydrophilicity before surface silanization. This assembly process, therefore, has a potential utilization for creating patterned superhydrophobic/superhydrophilic surfaces. One-sized nanoparticle films were also studied and found to be less efficient in achieving the desirable multifunctional properties.

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