Marked ion current rectification in microchannels

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（6）
• 页码范围: 685-686
• 页数: 2页
• 语种: 英文
• DOI: 10.1007/s11426-017-9052-x

摘要

Ion current rectification (ICR) is a physical phenomenon caused by asymmetric transport of anions and cations across an ion nanopore/channel,in which the ion current at a voltage of one polarity is much higher or lower than the one of opposite voltage polarity.Since ICR was first observed in a nanopipette in 1997,extensive research has been performed using various nanopores/nanochannels,revealing the applicability of ICR in various fields including fluidic logic circuits (i.e.,iontronics),energy conversion and storage,desalination,and sensing.However,the practical application of ICR is restricted by the difficulty of fabricating suitable devices,because ICR is usually achieved within nanopores/nanochannels with a diameter smaller than the Debye length (i.e.,1-100nm) and low fluid flow flux.Thus,achieving ICR in microchannels is an interesting research goal [1].