Electrochemical-total internal reflection ellipsometry (EC-TIRE) has been proposed as a technique to observe the redox reactions on the electrode surface due to its high phase sensitivity to the electrolyte/electrode interface. In this paper, we mainly focus on the influence of the potential modulation on the TIRE response. The analysis suggests that both dielectric constant variation of gold and the electric double layer transformation would modulate the reflection polarization of the surface. For a nonfaradaic process, the signal of TIRE would be proportional to the potential modulation. To testify the analysis, linear sweep voltammetry and open circuit measurement have been performed. The results strongly support the system analysis.
| http://dx.doi.org/10.1021/acs.analchem.5b04587 |
The authors thank the financial support to the International Science & Technology Cooperation Program of China (Grant 2015DFG32390), to the seventh Sino-Portugal Scientific and Technological Cooperation of 2013-2015, to the National Basic Research Program of China (Grant 2015CB352100), to the National Natural Science Foundation of China (Grants 21305147 and 81472941), the Portuguese Foundation for Science and Technology, FCT (Projects IF/00808/2013/CP1159/CT0003 and UID/MULTI/00612/2013), POPH and UE, and FSE, Yantai Science and Technology Development Fund (2012128).
Liu, W; Niu, Y; Viana, AS; Correia, JP; Jin, G.Potential Modulation on Total Internal Reflection Ellipsometry.ANALYTICAL CHEMISTRY, 2016,88:3211-3217.