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Assembly And Characterization Of Sams Formed By The Adsorption Of Alkanethiols On Zinc Selenide Substrates, Alison Noble, Ralph G. Nuzzo
Assembly And Characterization Of Sams Formed By The Adsorption Of Alkanethiols On Zinc Selenide Substrates, Alison Noble, Ralph G. Nuzzo
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Alkanethiols HS(CH2)nCH3 (n = 7, 11, 15, 17) and the hydroxy functional thiol HS(CH2)12OH are shown to adsorb from solution onto zinc selenide crystals and form well-organized monolayers. The chemisorption of these organosulfur compounds has been studied using transmission Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and surface wetting properties. FTIR indicates that the longer chain alkanethiols (n = 15, 17) form well-defined SAMs with crystalline-like conformations of the chains within the monolayers. As the chain length decreases, there is less conformational order …