论文标题
跨活动可切换膜的谐振渗透
Resonant osmosis across active switchable membranes
论文作者
论文摘要
为了克服传统的过滤范式，在隔离原理上基本上进行分离，我们探索了通过活性膜进行动态渗透的概念。部分渗透的膜呈现出可计算的特征，该特征会改变与溶质的有效孔相互作用，从而随着时间的推移而积极地改变渗透率。通常，我们发现缓慢闪烁的频率有效地降低了渗透压，并且大型闪烁的频率不会改变它。在存在不对称膜的情况下，我们发现了进行溶质泵送的谐振频率，可以通过棘轮传输来分析。我们讨论并强调了这种共振渗透传输的特性。此外，我们表明动态渗透允许使用较少的能量在纳米级泵送溶质，而不是反渗透。这为构建高级过滤设备和设计人工离子机械开辟了新的可能性。
To overcome the traditional paradigm of filtration, where separation is essentially performed upon steric sieving principles, we explore the concept of dynamic osmosis through active membranes. A partially permeable membrane presents a time-tuneable feature that changes the effective pore interaction with the solute and thus actively changes permeability with time. In general we find that slow flickering frequencies effectively decrease the osmotic pressure, and large flickering frequencies do not change it. In the presence of an asymmetric membrane, we find a resonant frequency where pumping of solute is performed and can be analyzed in terms of ratchet transport. We discuss and highlight the properties of this resonant osmotic transport. Furthermore, we show that dynamic osmosis allows to pump solute at the nanoscale using less energy than reverse osmosis. This opens new possibilities to build advanced filtration devices and design artificial ionic machinery.
