Domain structure of binary self-assembled monolayers composed of 3-MERCAPTO-1-PROPANOL (cas 19721-22-3) and 1-tetradecanethiol on Au(1 1 1) prepared by coadsorption
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Add time:09/02/2019 Source:sciencedirect.com
The structure of the domains of phase-separated binary self-assembled monolayers (SAMs) composed of 3-MERCAPTO-1-PROPANOL (cas 19721-22-3) and 1-tetradecanethiol (TDT) on Au(1 1 1) strongly depends on the thiol concentration of the solution from which the SAM is formed. Cyclic voltammograms and scanning tunneling microscopic images show that a binary SAM formed from 1×10−6 mol dm−3 concentration of a thiol solution exhibits the phase separation with characteristic finger-shaped domains, long and narrow TDT-rich domains elongate to 〈101〉 directions of the Au substrate. The size of the domains becomes longer and the degree of phase-separation becomes higher as the concentration of the thiol solution used in preparing the SAM is lower.
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