329 表面のマイクロストラクチャによる付着性の制御(OS-16 微細加工と表面機能)

概要

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Hydrophobicity of biochips is controlled by surface topography. The structured surface with micro-scale pillars improves hydrophobicity with small contacts of liquid-solid interface. The hydrophobic surface is discussed in a geometrical model of the truncated cone-shaped pillars with the equilibrium contact angle on the flat surface. The liquid flow is also analyzed to show the effect of the pillars on the fluid velocity in CFD. The liquid flows at a certain velocity above the top of the pillars. The bio sample, therefore, cannot be left on the structured surface due to the effects of the pillars on hydrophobicity and the fluid velocity. An experiment shows that few bacteria are observed on the structured area, while a number of bacteria are left on the non-structured flat area.
社団法人日本機械学会の論文
2006-11-24