Formation of two-dimensional colloidal sphere arrays on micro-patterns

Neil A. Bernotski, Xiaorong Xiong, Kerwin Wang, Nels E. Jewell-Larsen, Karl F. Böhringer

研究成果: Paper

4 引文 斯高帕斯(Scopus)

摘要

A hydrophobic substrate patterned with hydrophilic squares is used as a template for the selective deposition of two-dimensional micron and submicron polystyrene sphere arrays. In experiment, a monodisperse colloidal solution is applied to a patterned substrate. When the colloid is drawn off the substrate, two-dimensional arrays of colloidal spheres are selectively formed in the center of the hydrophilic squares. Optical microscopy coupled with high-speed photography allows the observation of this process for 1μm and 290nm polystyrene spheres. The observations reveal that as the body of colloid recedes off the substrate, the three-phase contact line becomes pinned at the pattern edges. This pinning causes the colloid to stretch across the hydrophilic areas, forming liquid films that neck and break off from the main body of colloid. The film is sufficiently thin to force the colloidal particles into a single layer. Capillary forces from the remaining liquid centers and packs the two-dimensional arrays in the hydrophilic patterns.

原文English
頁面76-82
頁數7
出版狀態Published - 2005 十二月 1
事件2nd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2005 - Snowbird, UT, United States
持續時間: 2005 四月 242005 四月 28

Other

Other2nd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2005
國家United States
城市Snowbird, UT
期間05-04-2405-04-28

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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  • 引用此

    Bernotski, N. A., Xiong, X., Wang, K., Jewell-Larsen, N. E., & Böhringer, K. F. (2005). Formation of two-dimensional colloidal sphere arrays on micro-patterns. 76-82. 論文發表於 2nd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2005, Snowbird, UT, United States.