Used as a key intermediate in the synthesis of self-assembled monolayers (SAMs) on gold surfaces, enabling precise surface modification for biosensors and molecular electronics. Its thiol group binds strongly to gold, while the amide terminus provides a site for further functionalization, allowing attachment of biomolecules or polymers. Commonly applied in nanotechnology research, particularly in creating bio-interfaces for diagnostic devices and studying protein interactions at modified surfaces. Also utilized in electrochemical sensors due to its ability to form stable, ordered monolayers that enhance electron transfer control.