Concentration dependence of ionic conductance measured with ion-selective sub-micro pipette probes in aqueous sodium and potassium chloride solutions

被引：12

作者：

Son, J. W. ^{[1
]}

Takami, T. ^{[1
]}

Lee, J-K. ^{[1
]}

Kawai, T. ^{[1
]}

Park, B. H. ^{[1
]}

机构：

[1] Konkuk Univ, Div Quantum Phases & Devices, Dept Phys, Seoul 143701, South Korea

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 03期

关键词：

SCANNING ELECTROCHEMICAL MICROSCOPY; ELECTRODES; CELLS;

D O I：

10.1063/1.3615281

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Selective ionic currents in aqueous sodium and potassium chloride solutions with concentrations from 0.01 M to 1.0 M were measured using sub-micro pipette probes in which a poly(vinyl chloride) film containing crown ethers selectively filtered sodium or potassium ions. The selective ionic currents were monitored with a sub-picoampere current measurement system developed from the techniques of T Omega-gap impedance scanning tunneling microscopy. The ionic currents increased with the concentration of the corresponding solution, and thus these sub-micro pipette probes can be applied to detect local ionic concentration of a specific ion in living cells with ionic concentration higher than 0.1 M. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615281]

引用

页数：3

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