本研究旨在探討在稀釋的陽離子/非離子型界面活性劑的中孔洞二氧化矽合成系統中,添加醇類對所生成材料的結構與外觀形貌的影響與效應。其中我們選擇了六種不同的醇類進行研究,包括:乙醇、丙醇、異丙醇、丁醇、2-丁醇以及第三丁醇。我們觀察到了由添加醇類所造成的結構轉變,並將其解釋為醇類分子進入到微胞當中,使微胞堆積參數受到影響,進而改變最後的結構。此外,在醇類效應的研究中,我們還發現了具有棒狀外貌的 MCM-48 ;經過鑑定,我們認為該材料有沿著 Ia3d 結構中之 [111] 方向生長的特性。我們還利用了小角度 X-ray 散射等技術,研究並推測其形成機制。我們亦利用金奈米棒作為核種,製備出其與二氧化矽層的複合材料。
In this thesis, we studied the alcohol effect in a dilute solution of cationic and nonionic surfactant. Six different alcohols including Ethanol, 1-Propanol, 2-Propanol, 1-Butanol, 2-Butanol and tert-Butanol were applied for this study. The alcohol-induced structural transition was observed, and could be rationalized by the penetration of alcohol molecules into the mixed micelles of CTAB and C12EO4, increasing the packing parameter g. Among the study of alcohol effect, the MCM-48 with anisotropic morphology, which has not been reported ever, was obtained by adding 2-Propanol. The MCM-48 with anisotropic morphology was characterized to have a preferential growth along [111] direction of Ia3d mesophase. A formation mechanism was proposed based on the ex-situ small-angle X-ray scattering (SAXS) and other analyses. We further performed the synthesis of core-shell Au nanorod@Ia3d structured silica via a seeded growth route in the presence of 2-Propanol.