Adsorption kinetics of p-nitrobenzenethiol self-assembled monolayers on a gold surface |
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| Authors: | Jakubowicz A Jia H Wallace R M Gnade B E |
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| Affiliation: | Department of Electrical Engineering, Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, TX 75083, USA. |
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| Abstract: | The adsorption kinetics of octadecanethiol (ODT) and p-nitrobenzenethiol (NBT) from ethanol solutions has been studied by means of contact angle, optical ellipsometry, angle-resolved X-ray photoelectron spectroscopy (ARXPS), and grazing angle attenuated total reflection Fourier transform infrared (FTIR) measurements. ODT data were used as a reference for the kinetics studies of film growth. The growth of self-assembled monolayers from dilute solutions follows Langmuir isotherm adsorption kinetics. A saturated film is formed within 5 h after immersion in solutions of concentrations ranging from 0.0005 to 0.01 mM. The density of the monolayer depends on the concentration of the solution. |
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