Complex aggregates of spherical colloids via modified micromolding in capillaries

详细信息    查看全文

• 作者：Weihuan Huang ; Jian Li ; Longjian Xue ; Rubo Xing ; Shifang Luan ; Chunxia Luo ; Libin Liu and Yanchun Han
• 关键词：Micromolding in capillaries (MIMIC) ; Silica microspheres ; Aggregates ; Conformal contact ; Non-conformal contact
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2006
• 出版时间：20 April 2006
• 年：2006
• 卷：278
• 期：1-3
• 页码：144-148
• 全文大小：412 K

文摘

This paper describes a simple approach to fabricate aggregates composed of monodispersed silica microspheres by modified micromolding in capillaries (MIMIC). Two different kinds of contact modes, namely, conformal contact and non-conformal contact, between the poly(dimethylsiloxane) (PDMS) mold and the underlying prepatterned substrate, can be controlled during the micromolding, which result in the formation of different aggregates under the influence of template confinement and capillary forces. These aggregates, including woodpile structure, discoid, conoid and rectangular clusters, possess well-controlled sizes and orientation. The possible mechanisms for the formation of different aggregates are discussed in detail.