著者

新宅 博文 多田羅 晋生 川野 聡恭

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 B編 (ISSN:03875016)

巻号頁・発行日

vol.74, no.745, pp.1942-1950, 2008-09-25 (Released:2011-03-03)

参考文献数

21

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In this study, we demonstrate the small droplet transportation on vertical parallel electrodes using electrowetting and the interfacial oscillation. The transportation of water droplets, which can be applied to the droplet-based biochemical devices, is performed by applying ac voltage that ranges from 0 to 100 Vpp and from 20 to 100 Hz. The characteristic of the transportation is observed by the use of a high speed camera, and the effects of the interfacial oscillation and the dynamical contact angle on the droplet motion are investigated in detail. The experimental results show that the vertical velocity of the droplet can be controlled by changing the amplitude and frequency of applied ac voltage. In addition, the dynamics of the droplet is estimated theoretically considering the interfacial tension force due to the dynamical contact angle and the gravitational force. The predicted force and displacement of the droplet agree well with the experimental values obtained from the high speed observation of the droplet motion.

著者

川野 聡恭 丸山 洋平

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.23, no.1, pp.36-41, 2004-03-15

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In the present paper, a simple model for electron-DNA scattering based on quantum theory is proposed. A mathematical formula for governing equations of e-DNA collisions is derived by use of the present model. A numerical code for solving the differential equations is developed. Furthermore, a simple prediction method based on the calculated total cross section is proposed for DNA double strand breaks. The comparison between the predictions and the previous experiments is made in detail for DNA double strand breaks. They are in qualitative agreement and the validity of the present model is confirmed.