期刊
ANALYTICAL CHEMISTRY
卷 85, 期 15, 页码 7447-7453出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac401399s
关键词
-
资金
- European Research Council (Advanced Grant)
- Knut and Alice Wallenberg Foundation
- Swedish Research Council (VR)
- Royal Society of Arts and Sciences in Gothenburg
- National Institutes of Health
- VR
- Angpanneforeningen's Foundation for Research and Development
We have compared the properties and resistance to DA fouling of a carbon nanotube fiber (CNTF) microelectrode to a traditional carbon fiber (CF) microelectrode. These two materials show comparable electrochemical activities for outer-sphere and inner-sphere redox reactions. Although the CNTF might have a higher intrinsic RC constant, thus limiting its high-frequency behavior, the CNTF shows a significantly higher durability than the CF in terms of electrode stability. During constant oxidation of 100 mu M DA, the signal measured by the CNTF rnicroelectrode shows a 2-h window over which no decrease in current is observed. Under the same conditions, the current obtained at the CF microelectrode decreases by almost 50%. A model of the fouling process, assuming the formation of growing patches of insulator on the surface, has been compared to the data. This model is found to be in good agreement with our results and indicates a growth rate of the patches in the 0.1-2 nm s(-1) range.
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