期刊
MICROCHEMICAL JOURNAL
卷 181, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2022.107718
关键词
Spectroelectrochemistry; Microfluidics; Microscale
资金
- National Science Foundation [1506817]
- Marie A. Amero Endowed Research Scholarship
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1506817] Funding Source: National Science Foundation
This study describes a simple microfluidic device that allows spectroelectrochemical measurements on submicroliter samples. By utilizing embedded electrode chips and a solution-cast ionomeric film, measurements on smaller sample volumes can be achieved.
The design, fabrication, and performance of a simple microfluidic device permitting spectroelectrochemical measurements on submicroliter samples are described. Planar electrode chips were prepared from cast epoxy and assembled to yield a device with a single flow channel of approximate dimensions 25 mm x 1.3 mm x 0.2 mm. Spectral measurements were made by passing the light beam parallel to the 1.3-mm channel dimension, resulting in a relatively high optical sensitivity. Bare disk electrodes embedded in opposing channel walls permit spectroelectrochemical measurements on sample volumes as low as approximately 3 mu L, corresponding to a solution plug just long enough to contact all three electrodes. Adding a solution-cast ionomeric film to the channel wall containing reference and auxiliary electrodes provided an effective salt bridge to significantly smaller sample volumes in contact with a bare working electrode on the opposite channel wall. As demonstration of submicroliter sample analysis, spectroelectrochemical measurements were carried out on a similar to 0.3 mu L aqueous ferricyanide solution and showed near exhaustive electrolysis of the optically sampled volume is achieved in approximately 3 min.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据