| Abstract
| - (3-Aminopropyl)trimethoxysilane (APTMS)-supported gold colloid electrode was constructedby virtue of a recently developed solution-based self-assembly strategy. The preparingprocedure of 3-mercaptopropionic acid (MPA)-bridged copper hexacyanoferrate (CuHCF)multilayers on a planar macroelectrode (Bharathi et al. Langmuir2001, 17, 7468) was copiedto the as-prepared colloid electrode. The optical spectra, atomic force microscopy, andelectrochemistry demonstrate successful copy of the multilayer system on a macroelectrodeto the as-prepared colloid electrode. Remarkably, it was found that multilayer growth ishighly selective to the nanoscale sites where gold nanoparticles are immobilized, andmultilayer growth does not take place on the sites without nanoparticles. Interestingly, apreliminary electrochemical investigation indicates that electrochemical properties ofmultilayers systems on the colloid electrode are different from their counterparts on a planarmacroelectrode, which might be due to high curvature effects of the gold nanoparticles. Thisindicates a different motif of multilayers on the colloid electrode from that on a planarmacroelectrode.
- A kind of ion reactive multilayers on a planar macroelectrode was copied safely to the as-prepared gold colloid electrode. The graphic illustrates the possible structure of self-assembled multilayer systems on the gold colloid electrode.
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