2 research outputs found
Potential Modulation on Total Internal Reflection Ellipsometry
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
Studies on the Electrochemical Growth of (Per)<sub>2</sub>[Au(mnt)<sub>2</sub>]
The first stages of the electrocrystallization of (Per)<sub>2</sub>[AuĀ(mnt)<sub>2</sub>] salt from dichloromethane on gold, platinum,
and highly orientated pyrolytic graphite (HOPG) were investigated
by cyclic voltammetry, atomic force microscopy, and X-ray photoelectron
spectroscopy in order to understand the determinant factors for nucleation
and crystal growth. The crystal growth occurs from adsorbed films
of dithiolate on gold or platinum and of perylene on HOPG, after homogeneous
nucleation, and it is controlled by the low diffusion of the species
toward the growing surface