论文标题
有效带电的外表面，可在盐梯度下通过纳米孔增强离子扩散
Effective Charged Exterior Surfaces for Enhanced Ionic Diffusion through Nanopores under Salt Gradients
论文作者
论文摘要
高性能渗透能量转化需要大的离子吞吐量和高离子选择性，这可以同时通过外表面电荷来显着促进，尤其是对于短纳米孔。在这里，我们研究了在各种条件下带电的外表面通过带电的外表面增强的，并探索相应的有效带电区域。从模拟中，通过通过纳米孔（较短，直径较大且直径较大，表面电荷密度）或更高盐梯度下的纳米孔中的外表面电荷来更明显地促进离子扩散。纳米孔附近的带电环区域的有效宽度与孔长度相反，并线性依赖于孔径，盐梯度和表面电荷密度。由于有效带电区域在离子扩散通过单个纳米孔传播到具有多孔膜的病例中的重要作用，我们的结果可能为多孔膜的设计和制造提供了有用的指导，用于实用的高性能渗透渗透收获。
High-performance osmotic energy conversion requires both large ionic throughput and high ionic selectivity, which can be significantly promoted by exterior surface charges simultaneously, especially for short nanopores. Here, we investigate the enhancement of ionic diffusion by charged exterior surfaces under various conditions and explore corresponding effective charged areas. From simulations, ionic diffusion is promoted more significantly by exterior surface charges through nanopores with a shorter length, wider diameter, and larger surface charge density, or under higher salt gradients. Effective widths of the charged ring regions near nanopores are reversely proportional to the pore length and linearly dependent on the pore diameter, salt gradient, and surface charge density. Due to the important role of effective charged areas in the propagation of ionic diffusion through single nanopores to cases with porous membranes, our results may provide useful guidance to the design and fabrication of porous membranes for practical high-performance osmotic energy harvesting.
