2006 年 114 巻 1325 号 p. 120-124
The mechanism of “top-gathering” pillars and the controllability of top-gathering pattern formation were investigated. Two-dimensional pillar arrays with micrometer repetitions have been fabricated from a hybrid organic-inorganic material by photolithography. The type of array structure formed depending on the distance between neighboring pillars. From in situ observation during drying, it was found that capillary force is affected by the distance between the pillars. Such pillars of 16 μm height were gathering, and top-gathering units could be obtained when the distance between neighboring pillars is less than 8 μm. Gathering units composed of four pillars can be formed periodically by controlling the arrangement of the pillars.