论文标题
共鸣驱动的纳米孔可以用作纳米螺旋体
Resonantly-driven nanopores can serve as nanopumps
论文作者
论文摘要
具有直流电场的电解质填充纳米孔中的运输导致了从纳米传感器到DNA测序的影响力。在这里，我们使用Poisson-Nernst-Planck和Navier-Stokes方程，以表明无偏的AC场可以诱导封闭式锥形纳米孔中的可比方向流。该流程仅在两个竞争时间标准的共振上进行中间驾驶频率和铰链上发生，代表孔口和孔内的空间电荷发育。我们在分析模型中总结了谐振纳米泵的物理学，该模型重现了数值模拟的结果。我们的发现提供了通往实时可控流动模式的通用途径，该途径可能会在控制粒子（例如小分子或纳米胶体）的易位时找到应用。
Inducing transport in electrolyte-filled nanopores with dc fields has led to influential applications ranging from nanosensors to DNA sequencing. Here we use the Poisson-Nernst-Planck and Navier-Stokes equations to show that unbiased ac fields can induce comparable directional flows in gated conical nanopores. This flow exclusively occurs at intermediate driving frequencies and hinges on the resonance of two competing timescales, representing space charge development at the ends and in the interior of the pore. We summarize the physics of resonant nanopumping in an analytical model that reproduces the results of numerical simulations. Our findings provide a generic route towards real-time controllable flow patterns, which might find applications in controlling the translocation of particles such as small molecules or nanocolloids.
