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.

该项目涉及锥形玻璃纳米孔的离子通量（主要是K+和Cl-）。这样的纳米孔可以在标准实验室中轻松且可重复地制造。它们显示了离子电流整流（ICR）的有趣特征，这意味着它们的稳态电流电压曲线与直线偏离。 ICR的初步似乎是一种离子物种通过孔口优先易位。但是，尚未完全理解基本机制。我们的目标是为ICR的基本理解做出贡献。我们还提出了一种方法，如何实现金属纳米孔处离子通量的直接静电门控。合成纳米孔被广泛用作生物毛孔的模型系统。离子通量的选择性是生物毛孔功能的关键特征，我们希望我们的结果对生物物理群落很有趣。

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