Abstract
The concept of our research with the aim at giving potential-regulated dynamic movements to adsorbed molecular assemblies and nano-substances on the electrode surfaces was described. The importance of extending the target entities to be moved from amphiphiles to dendrimers and surface-modified metal nanoparticles was emphasized. Results of electrochemical measurements were used to demonstrate the potential-dependent changes in adsorption structures for three different types of substances at a Au(111) electrode in aqueous solution. The substances include amphiphiles bearing a terminal 4-pyridyl (Py) group, poly(amideamine) dendrimer the periphery of which was totally modified with Py groups, and a Au nanoparticle containing Py groups in its surface protecting layer. For example, potential-regulated reversible movements of the dendrimer, that is, partial adsorption-desorption as well as orientation change of peripheral Py groups, were achieved for the first time.
