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Insulation by Solution 3-Mercaptopropyltrimethoxysilane (MPS) Coating: Effect of pH, Water, and MPS Content
Journal article   Peer reviewed

Insulation by Solution 3-Mercaptopropyltrimethoxysilane (MPS) Coating: Effect of pH, Water, and MPS Content

Mehmet C. Soylu, Wei-Heng Shih and Wan Y. Shih
Industrial & engineering chemistry research, v 52(7), pp 2590-2597
20 Feb 2013
DOI: https://doi.org/10.1021/ie302231g
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

Engineering Engineering, Chemical Science & Technology Technology
We have investigated the effect of 3-mercaptopropyltrimethoxysilane (MPS) concentration, water content, and pH on the thickness and insulation quality of a MPS coating layer on a gold electrode obtained in an MPS solution in ethanol. We showed that controlling the MPS concentration, water content, and pH were all important for the insulation coating. With 1% MPS and 0% water, the coating rate remained well below 1 nm/h at all pH and at 2 and 8 nm/h in 0.1% MPS with 0.5% water at pH 9 and in 1% MPS with 1% water at pH 9, respectively. Furthermore, the surface of the MPS coating obtained with 0.1% MPS and 0.5% water at pH 9 was smooth for optimal binding surface stress induced detection resonance shift in a piezoelectric plate sensor. The width-mode resonance frequency of a piezoelectric plate sensor insulated with a MPS coating obtained in 0.1% MPS with 0.5% water at pH 9 for 36 h was shown to be stable for more than 24 h in a phosphate buffered saline solution.

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16 citations in Web of Science
16 citations in Scopus

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Web of Science research areas
Engineering, Chemical
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