Insight in layer-by-layer assembly of cysteamine and l-cysteine on the copper surface by electrochemistry and Raman spectroscopy

In this work, we examined the relationship between the anticorrosion behavior and the structure of the cysteamine/l-cysteine layer-by-layer coating on the copper surface via the self-assembled monolayers (SAMs) technique with electrochemistry and surface-enhanced Raman scattering (SERS) spectroscopy. SERS results elucidated the layer-by-layer adsorption mechanism of cysteamine/l-cysteine at the copper surface. Electrochemical investigations explored the inhibition behavior of cysteamine/l-cysteine for copper from corrosion with a high protection efficiency of 91.4%.