Buffer effect on the ionic conductance in a pH-regulated nanochannel

被引：18

作者：

Mei, Lanju ^{[1
]}

Yeh, Li-Hsien ^{[2
]}

Qian, Shizhi ^{[1
]}

机构：

[1] Old Dominion Univ, Inst Micro Nanotechnol, Norfolk, VA 23529 USA

[2] Natl Yunlin Univ Sci & Technol, Dept Chem & Mat Engn, Yunlin 64002, Taiwan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2015年 / 51卷

关键词：

Nanofluidics; Analytical model; Charge regulation; Tris buffer; Electrical four layer model; SURFACE-CHARGE PROPERTY; SOLID-STATE NANOPORES; NANOFLUIDIC CHANNELS; ELECTROKINETIC TRANSPORT; ELECTROOSMOTIC FLOW; ENERGY-CONVERSION; POLYELECTROLYTE BRUSHES; CONCENTRATION GRADIENT; SILICA NANOCHANNELS; GATED NANOCHANNEL;

D O I：

10.1016/j.elecom.2014.12.020

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An electrical four layer model taking into account surface chemical reactions and adsorption of the metal and Tris buffer cations is developed for the first time to investigate the buffer effect on the ionic conductance in a pH-regulated nanochannel. Predictions from the analytical model agree well with experimental data of the conductance in silica nanochannels. The buffer effect is significant at low salt concentration, and the behaviors of zeta potential, surface charge density, and conductance in a nanochannel with buffer are distinctly different from those without buffer. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：129 / 132

页数：4

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