在微/纳米尺度下，是什么控制了单个DNA分子附近的水的流体行为
What governs the fluidic behavior of water near single DNA molecules at the micro/nano scale
摘要：
以单DNA分子为模型体系，研究了水在微纳尺度下的流动行为。利用水流产生了跨度约为1微米的稳定的弯曲DNA图案，并用原子力显微镜观察。通过严格比较数值模拟结果与这些模式，它建议的宏观流体动力学方程的形式仍然定量地工作在纳米尺度上的流体流动。然而，分子效应仍然很明显，相邻水的有效粘度远大于其体积值。我们的观察也有助于理解从纳米尺度到微米尺度的生物分子在溶液中的动力学。
英文摘要：
The fluidic behavior of water at the micro/nano scale is studied by using of single DNA molecules as a model system. Stable curved DNA patterns with spans about one micron were generated by using of water flows, and observed by Atomic Force Microscopy. By rigorously comparing the numerical simulation results with these patterns, it is suggested that the form of the macroscopic hydrodynamic equation still works quantitatively well on the fluid flows at the nanoscale. The molecular effects, however, are still apparent that the effective viscosity of the adjacent water is considerably larger than its bulk value. Our observation is also helpful to understand of the dynamics of biomolecules in solutions from nanoscale to microscale.
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