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Static and Dynamic Capillarity in Silicon Based Nanochannels

机译：硅基纳米通道中的静态和动态毛细作用

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摘要

In this chapter we review the fabrication of silicon based nanochannels and their use in capillarity studies. Static capillarity measurements of the pressure in isolated liquid plugs confined in hydrophilic nanochannels, confirm the existence of capillary negative pressure, quantitatively in accordance with the Young-Laplace equation. The negative pressure can be quantified through measurement of the elasto-capillary deformation of the channel capping due to the pressure difference with the atmospheric pressure. By measuring the capillary filling dynamics in nanochannels of uniform and accurately defined height, different (apparent) viscosity effects in confinement have been revealed. One effect (visible in insulating sub-100-nm channels) is likely to be related to the influence of the electrical double layer (an electroviscous effect), while the other effect (visible in conductive sub-50 nm channels) seems to be related to a decrease in the effective channel due to a thin immobile layer close to the polar or charged channel wall.
机译：在本章中，我们回顾了硅基纳米通道的制造及其在毛细作用研究中的用途。封闭在亲水性纳米通道中的隔离液体塞中压力的静态毛细血管测量，证实了根据Young-Laplace方程定量地存在毛细管负压。负压可通过测量由于压力与大气压力之差引起的通道盖的弹性毛细管变形来量化。通过测量均匀且精确定义的高度的纳米通道中的毛细管填充动力学，已揭示了封闭中不同的（表观）粘度效应。一种效应（在低于100 nm的绝缘通道中可见）可能与双电层的影响（电粘性效应）有关，而另一种效应（在低于50 nm的导电通道中可见）似乎与电气双层有关。由于靠近极性或带电通道壁的薄的固定层导致有效通道的减少。

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  • 会议地点 Ein Bokek(IL)
  • 作者

    Niels Tas; Nataliya Brunets; Joost W. van Honschoten; Jeroen Haneveld; Henri V. Jansen;

  • 作者单位

    Department of Transducers Science and Technology, MESA+ Institute tor Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

    Department of Transducers Science and Technology, MESA+ Institute tor Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

    Department of Transducers Science and Technology, MESA+ Institute tor Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

    Department of Transducers Science and Technology, MESA+ Institute tor Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

    Department of Transducers Science and Technology, MESA+ Institute tor Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

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