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Pyrolysis of self-assembled organic monolayers on oxide substrates

Published online by Cambridge University Press:  31 January 2011

Hyunjung Shin ,
Yuhu Wang ,
Uma Sampathkumaran ,
Mark R. De Guire ,
Arthur H. Heuer  and
Chaim N. Sukenik
Hyunjung Shin
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Yuhu Wang
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Uma Sampathkumaran
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Mark R. De Guire
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Arthur H. Heuer
Affiliation:
Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
Chaim N. Sukenik
Affiliation:
Department of Chemistry, Bar Ilan University, Ramat Gan, 52100, Israel
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Abstract

The pyrolysis of siloxy-anchored, organic self-assembled monolayers (SAMs) on oxide substrates [titanium dioxide powder; hydrolyzed silicon dioxide on (100) silicon] was studied using x-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and mass spectroscopy (MS). Pyrolysis in air began on heating at 200 °C and was complete by 400 °C for both octadecyltrichlorosilane (OTS) and C16-thioacetate (TA) SAMs, as observed in TGA of SAM-coated TiO2 powders, and in XPS studies of TA-SAM-coated TiO2 powders and Si wafers after various heat treatments. In low-oxygen environments, pyrolysis of SAMs began at higher temperatures: between 250 and 400 °C for heating in ultrahigh vacuum (10−8 Torr) as observed in XPS studies of TA-SAMs on Si, and between 300 and 400 °C in nitrogen, as observed in TEM analysis of sulfonate SAMs under a TiO2 thin film on Si substrates.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 2116 - 2123
Copyright
Copyright © Materials Research Society 1999

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