Surface Reactions On Demand: Electrochemical Control of SAM-Based Reactions

摘要

Self-assembled monolayers (SAMs) are well-ordered, single-molecule-thick structures in two dimensions, which form spontaneously at interfaces (usually at solid surfaces).[1] SAMs have been used for controlling physical properties of interfaces, such as wetting, adhesion, lubrication, and corrosion, as well as understanding fundamental aspects of interfacial phenomena. In addition, SAMs comprise an excellent platform for generating two-dimensional micro- and nanostructures. For example, SAMs are widely utilized for the spatially resolved immobilization of biomolecules (i.e., DNAs, peptides, and polysaccharides) and cells onto surfaces. Although useful in these various domains, these applications are based on the “static” property of SAMs. In other words, SAMs (especially the head groups of SAMs) are designed to meetthe criteria of the applications because the head groups intimately, but “statically”, interact with the outside environment. SAMs execute their predetermined roles once they are formed on surfaces, these roles are exemplified by corrosion barriers, etching masks, and recognition of biological entities.