A simple modular aptasensor platform utilizing cucurbit[7]uril and a ferrocene derivative as an ultrastable supramolecular linkerElectronic supplementary information (ESI) available: Experimental details of chemical synthesis, SPR measurements and filter binding assays. See DOI: 10.1039/c4cc08027k

A simple modular aptamer-based sensor (aptasensor) platform was prepared by combining the merits of the rapid and efficient preparation of a self-assembled monolayer of cucurbit[7]uril (CB[7] SAM) and the strong and specific binding affinity of CB[7] to ferrocenemethylammonium (FA), as an ultrastable supramolecular linker, to immobilize aptamers on CB[7] SAM. A simple aptasensor platform was prepared by combining the merits of the efficient preparation of self-assembled monolayer of cucurbit[7]uril and its high binding affinity to ferrocene derivatives.