Abstract
The kinetics of thermal desorption and displacement of self-assembled monolayers (SAMs) on gold derived from the adsorption of 2,2-dipentadecylpropane-1,3-dithiol (d-C17, [CH3(CH2)14]2C[CH2SH]2), 2-pentadecylpropane-1,3-dithiol (m-C17, CH3(CH2)14CH[CH2SH]2), and heptadecanethiol (n-C17, CH3(CH2)16SH) were explored. The kinetics were monitored by optical ellipsometry, contact angle goniometry, and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS). Thermal desorption studies of the SAMs in decalin at elevated temperatures demonstrated an enhanced stability for films generated from d-C17 and m-C17 relative to that for the film generated from n-C17. These studies further demonstrated that SAMs adsorbed at elevated temperatures (e.g., 50 °C) are more stable than those adsorbed at room temperature. Upon exposure to ambient laboratory conditions for one month, densely packed SAMs generated from n-C17 and d-C17 underwent no detectable structural changes. In contrast, similar treatment...
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