Omega-Terminated Alkanethiolate Monolayers on Surfaces of Copper, Silver and Gold Have Similar Wettabilities
HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY
Pagination or Media Count:
Long chain alkanethiols HSCH2nX adsorb from solution onto the surfaces of freshly evaporated copper, silver and gold films and form oriented monolayers. Both polar and non-polar tail groups X can be accommodated in these adsorptions. Adsorption on all three metals generates self-assembled monolayers SAMs exhibiting similar wetting properties, and thus, by inference, having related oriented structures. XPS data suggest that the omega-terminated eta-alkanethiolate monolayers, like those derived from simple alkanethiols, are composed of trans-extended chains having orientations on copper and silver that are closer to the perpendicular to the surface than are those on gold. We have prepared and characterized monolayers mixed monolayers by exposure of all three metals to mixtures of HS CH211OH and HS9CH211CH3.
- Organic Chemistry