| 摘要: | 透過外部擾動的刺激，進而操控材料在不同層級尺度下自組裝達到結構有序性及多樣性，形成所謂的有序階層級結構。目前，此多層級結構的自組裝已成為用於製造複雜奈米結構材料自下而上的精密技術。然而由於自組裝結構在外部擾動下的應答發生於多尺度結構間在不同解析時間的動態變化，往往操控程序變因決定著此類材料的結構及性質，因此了解在非平衡狀態下不同尺度結構間彼此互動的動態研究及圖案成形對於建立軟物質材料層級結構的傳導機制相當重要。目前，嵌段共聚物薄膜自組裝及自我排序的特性、奈米微結構型態具多種複雜及奈米尺寸的可調性，有潛力應用在奈米科技中。在此研究計畫中，嵌段共聚物自組裝的有序且多種複雜的層級形態結構在奈米科技的應用上有極大的潛力，這引起我們對於自組裝成層級結構的高分子薄膜之形態、相行為乃至於結構動態學的興趣，進一步探討嵌段共聚物薄膜在外在條件擾動下對相行為與不同尺度下的結構動態的影響。 “Hierarchical self-assembly” is emerging as an elegant, bottom-up method for fabricating complex nanostructured materials since it allows the concurrent switching of functional properties based on phase transitions of self-assembled structures in response to external stimuli [J. -M. Lehn, Science, 2002, 295, 2400; G. M. Whitesides, B. Grzybowski, Science 2002, 295, 2418]. However, such structural changes in response to external perturbations involve cooperative dynamics at different length levels and different time scales. As a consequent, the conditions of processing govern the final structures and properties of materials. Therefore, understanding the cooperative dynamic and pattern formation of various levels of structures is important for establishing transport mechanisms of hierarchical structures at nonequilibrium conditions in soft materials [Hashimoto, T. Bull. Chem. Soc. Jpn., 2005, 78, 1]. In this research plan, we are interested in the morphology, phase behavior and dynamics of hierarchical self-assembly in BCP thin films since their various complicated morphologies with ordering at different levels offer diverse and versatile benefits as potential nanotechnological applications. The key theme of the proposal is to gain depth understanding the dynamics of the hierarchical self-assembly with phase transitions in response to external stimuli (such as thermal annealing or solvent annealing) in BCP ultrathin and thin films. 研究期間：10008 ~ 10107 |
