Self-assembled monolayers

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Self-assembled monolayers.
Schematic diagram of a self-assembled monolayer. (Image from Wikimedia Commons)

Self-assembled monolayers (SAMs) are a self-organizing layer of amphiphilic molecules in which the hydrophillic "head" group is attracted to a substrate and the hydrophobic "tail" end sticks-out into the solution. The self-attracting head group will nucleate and grow into a tightly packed single molecule layer on the substrate.