Memory devices composed of electrochemically-active molecules and ionic-liquid thin films

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Alkanethiol molecules with a ferrocenyl group, which are called to be ferrocenylthiols, are formed into self-assembled monolayers (SAMs) on gold surfaces. Because of their electrochemical activity, the SAMs are expected to be as a component of single-molecular memory device. Their stability would be improved by covering the SAMs using ionic liquid films. In this study, we studied SAM/ionic-liquid interfaces for this purpose by using atomic force microscopy and electrochemical quartz crystal microbalance.