论文标题
纳米颗粒在双极纳米孔中的当前整流
Current rectification by nanoparticles in bipolar nanopores
论文作者
论文摘要
众所周知，沿着孔轴的两个域和负电荷壁组成的两个域的双极纳米通道在暴露于电势偏置时会纠正电流。我们发现，加入带电的纳米颗粒可以大大增加整流的数量级。这里考虑了两个双极通道的几何形状。他们的行为在静止状态，并在负面偏见和积极偏见的影响下进行检查。我们通过依靠通道中电解质溶液的分子级模型来做到这一点。当前整流的大幅增加可以通过在通道内产生的固有电场来解释。发现这种效果在很大程度上取决于孔的几何形状，其电荷分布以及纳米粒子电荷的迹象，从而为设计工程的纳米膜膜纳米粒子系统提供了新的机会，以存储能量。
Bipolar nanochannels comprising two domains of positively and negatively charged walls along the pore axis are known to rectify current when exposed to an electric potential bias. We find that addition of charged nanoparticles can increase rectification considerably, by approximately one order of magnitude. Two bipolar channel geometries are considered here; their behavior is examined at rest and under the influence of a negative bias and a positive bias, respectively. We do so by relying on a molecular-level model of the electrolyte solution in the channels. The large increase in current rectification can be explained by the inherent electric field that charged nanoparticles generate within the channel. This effect is found to be largely dependent on the pore's geometry, its charge distribution, and the sign of the nanoparticles' charge, thereby offering new opportunities for design of engineered nanopore membrane-nanoparticle systems for energy storage.
