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首页> 外文期刊>Japanese journal of applied physics >Capillary-Driven Dynamics of Water in Hydrophilic Microscope Coverslip Nanochannels
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Capillary-Driven Dynamics of Water in Hydrophilic Microscope Coverslip Nanochannels

机译：亲水显微镜盖玻片纳米通道中水的毛细管驱动动力学。

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摘要

The capillary-driven filling speed of water in hydrophilic microscope coverslip planar nanofluidic channels is investigated. Nanochannels with depths ranging from 40 to 575 nm and widths ranging from 30 to 200 μm are fabricated on a coverslip substrate of borosilicate glass with a thickness of 160μm using buffered oxide wet etching and glass-glass fusion bonding techniques. Capillary filling speed is measured experimentally and compared with the theoretical and numerical predictions. It is found that the obtained experimental capillary filling speed is consistent with that predicted by the numerical model, but is significantly lower than that predicted by the classical Washbum equation. The failure of the theoretical model to correctly predict the filling speed is attributed to the erroneous assumption of a constant contact angle irrespective of flow rate and other flow obstructions. The experimental results show that capillary filling speed reduces with a reducing channel depth and an increasing filling length, but is insensitive to channel width.
机译：研究了亲水显微镜在盖玻片平面纳米流体通道中水的毛细管驱动填充速度。使用缓冲氧化物湿法刻蚀和玻璃-玻璃熔合技术，在厚度为160μm的硼硅酸盐玻璃的盖玻片基板上制造深度范围为40至575 nm，宽度范围为30至200μm的纳米通道。通过实验测量毛细管填充速度，并将其与理论和数值预测进行比较。发现所获得的实验毛细管填充速度与数值模型所预测的一致，但是明显低于经典Washbum方程所预测的。理论模型无法正确预测填充速度的原因是错误地假设了恒定的接触角，而与流速和其他流动障碍无关。实验结果表明，毛细管填充速度随着通道深度的减小和填充长度的增加而降低，但对通道宽度不敏感。

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  • 来源
    《Japanese journal of applied physics》 |2012年第10issue1期|105201.1-105201.5|共5页
  • 作者

    Ju-Nan Kuo; Yi-Kai Lin;

  • 作者单位

    Department of Automation Engineering, National Formosa University, Yunlin 632, Taiwan;

    Department of Automation Engineering, National Formosa University, Yunlin 632, Taiwan;

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