Mechanistic Insight into the Synthesis of Silica-Based 鈥淢atchstick鈥?Colloids

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• 作者：Brooke W. Longbottom ; Luke A. Rochford ; Richard Beanland ; Stefan A. F. Bon
• 刊名：Langmuir
• 出版年：2015
• 出版时间：August 25, 2015
• 年：2015
• 卷：31
• 期：33
• 页码：9017-9025
• 全文大小：558K
• ISSN：1520-5827

文摘

We report an insight into the synthesis of silica-based 鈥渕atchstick鈥?shaped colloidal particles, which are of interest in the area of self-propulsion on small length scales. The generation of aqueous emulsion droplets dispersed in an n-pentanol-rich continuous phase and their use as reaction centers allows for the fabrication of siliceous microparticles that exhibit anisotropy in both particle morphology, that is, a 鈥渕atchstick鈥?shape, and chemistry, that is, a transition-metal oxide-enriched head. We provide a series of kinetic studies to gain a mechanistic understanding and unravel the particle formation and growth processes. Additionally, we demonstrate the ability to select the aspect ratio of the 鈥渕atchstick鈥?particle in a straightforward manner.