Electrostatic gating of ionic fluxes at conical glass nanopores

锥形玻璃纳米孔离子通量的静电门控

• 批准号: 65636066
• 负责人: Professor Dr. Andreas Bund
• 金额: --
• 依托单位: Fachgebiet Elektrochemie und Galvanotechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/65636066?language=en
• 关键词: Electrostatic; gating; ionic; fluxes; conical

This project deals with ionic fluxes (mainly K+ and Cl-) at conical glass nanopores. Such nanopores can be easily and reproducibly manufactured in a standard lab. They show the interesting feature of ion current rectification (ICR) which means that their steady state current voltage curve deviates from a straight line. A preliminary for ICR seems to be that one ionic species translocates preferentially through the orifice. However, the underlying mechanism is not fully understood. Our aim is to contribute to the fundamental understanding of ICR. We also propose an approach how to realize a direct electrostatic gating of the ionic fluxes at metallized nanopores. Synthetic nanopores are widely used as model systems for biological pores. Selectivity of ionic fluxes is a key feature for the functioning of biological pores, and we expect our results to be interesting for the biophysical community.

该项目研究锥形玻璃纳米孔中的离子通量（主要是 K+ 和 Cl-）。这种纳米孔可以在标准实验室中轻松且可重复地制造。它们展示了离子电流整流（ICR）的有趣特征，这意味着它们的稳态电流电压曲线偏离直线。 ICR 的初步结果似乎是一种离子物质优先通过孔口移位。然而，其根本机制尚不完全清楚。我们的目标是促进对 ICR 的基本理解。我们还提出了一种如何在金属化纳米孔处实现离子通量的直接静电门控的方法。合成纳米孔被广泛用作生物孔的模型系统。离子通量的选择性是生物孔隙功能的关键特征，我们希望我们的结果能够引起生物物理学界的兴趣。

项目成果

Double layer effects at nanosized electrodes.

• DOI: 10.1039/c3fd00050h
• 发表时间: 2013-12
• 期刊: Faraday discussions
• 影响因子: 3.4
• 作者: A. Bund;Clemens Kubeil