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Articles
Self-Assembly of n-Alkyl Thiols as Disulfides on Au(111)
1 Department of Physics and Princeton Materials Institute, Princeton University, Princeton, NJ 08540, USA
A grazing incidence x-ray diffraction study of CH3(CH2)9SH self-assembled on the (111) surface of gold revealed a disulfide head group structure, which provides a context in which to understand the structure and self-assembly process of this widely studied system. The structure consists of a nearly hexagonal two-dimensional arrangement of the hydrocarbon chains with a dimerization of the sulfur head groups (accommodated through a gauche bond), resulting in a S-S spacing of 2.2 angstroms. These results demonstrate the importance of internal molecular degrees of freedom in the templating of "soft" organic materials on inorganic substrates. Submitted on June 27, 1994Accepted on September 7, 1994
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
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