Hydrodynamic Voltammetry with Nanogap Electrodes

被引：27

作者：

Rassaei, Liza ^{[1
]}

Mathwig, Klaus ^{[1
]}

Goluch, Edgar D. ^{[2
]}

Lemay, Serge G. ^{[1
,2
]}

机构：

[1] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[2] Delft Univ Technol, Dept Bionanosci, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 20期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

CHANNEL MICROBAND ELECTRODES; POTENTIAL STEP CHRONOAMPEROMETRY; WALL-JET ELECTRODE; STEADY-STATE; ELECTROCHEMICAL DETECTION; TRANSPORT; MICROELECTRODES; KINETICS; REGIMES; SYSTEMS;

D O I：

10.1021/jp2118696

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We study the influence of convective mass transport on faradaic currents detected under redox cycling conditions at nanogap electrodes embedded in a microchannel. We show that, unlike the case of microelectrodes, the limiting current in the nanofluidic device is not influenced by the sample flow rate in the microfluidic channel. This is due to both the hydraulic resistance of the nanochannel suppressing flow within the device and the inherently diffusion-based mass transport between microelectrodes separated by a 70 nm gap. These devices thus allow electrochemical measurements without the need for any flow velocity correction.

引用

页码：10913 / 10916

页数：4

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