Study of water properties in nanospace
Study of water properties in nanospace
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DOI：
10.1007/s00216-006-0469-3
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发表时间：
2006-10-01
影响因子：
4.3
通讯作者：
Baba, Yoshinobu
中科院分区：
文献类型：
--
作者：
Kaji, Noritada;Ogawa, Ryo;Baba, Yoshinobu
在这里，我们报告了水的反常行为，特别是它的粘度和流体动力流动，在纳米受限的空间。作为纳米受限空间的典型模型，采用基于DNA尺寸分离的纳米管芯片，采用单粒子跟踪(SPT)技术对纳米管芯片内的水粘度和流体动力流动进行了研究。纳米球的扩散系数几乎是由斯托克斯-爱因斯坦方程得出的理论值的三分之一。这一结果间接证明了水在纳米受限空间中的粘度高于在整体溶液中的粘度。为了提高用于DNA分离的纳米管芯片的分辨率和吞吐量，需要认真考虑这些影响性能的潜在因素。
Here we report an anomalous behavior of water, especially its viscosity and hydrodynamic flow, in a nanometer-confined space. As a typical model of a nanometer-confined space, the nanopillar chip, which was developed for DNA size-based separation was used, and single-particle tracking (SPT) technique was applied to investigate water viscosity and hydrodynamic flow in the nanopillar chip. The diffusion coefficients of nanospheres were almost one-third of the theoretical value derived from the Stokes-Einstein equation. This result gave indirect proof that water viscosity in a nanometer-confined space is higher than in a bulk solution. In order to improve resolution and throughput of the nanopillar chip for DNA separation, these potential factors affecting performance should be seriously considered.