| Summary: | 碩士 === 國立台灣工業技術學院 === 化學工程技術研究所 === 85 === The nucleation and growth behavior of the
electropolymerization of aniline on highly oriented pyrolytic
graphite (HOPG) substrate was investigated via cyclic
voltammetry (CV) , chronoampermetry (CA) , and atomic force
microscope (AFM). The current-time (i-t) curves for the
electropolymerization of aniline in aqueous solution are
categorized into two kinds . One kind of the i-t curves is
believed to be the behavior of the 3-dimension (3D) nucleation
and growth by comparing the theoretical and experimental data
but the other one is unclear. From the observation of AFM, the
behavior was found to be typical 3D-progressive nucleation and
growth when the higher potential(1.1V≦E≦2.0V) was applied.
However , the 3D-progressive and 2D-instantaneous nucleation and
growth occurred simultaneously when the lower potential (0.8V
≦E≦1.0V) was applied. The coexistence of 3D-progressive and
2D-instantaneous nucleation and growth during the
electropolymerization of aniline in aqueous solution was
concluded from the combination of i-t curves and AFM
observation. The behavior of the electropolymerization of
aniline in organic solution was suggested to be the
coexistence of 3D-progressive and 3D-instantaneous
nucleation and growth via the observation of AFM, and layer by
layer growth from the analysis of i-t curves . The behavior of
nucleation andgrowth can be distinguished more clearly with
the combination of i-t responses and the observation of AFM
which can compensate for the disadvantages resulting from the
observation only by one of the methods.
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