A chemical modification of alkanethiol self-assembled monolayers with alkyltrichlorosilanes for the protection of copper against corrosion

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2055053· OSTI ID:7018905

Itoh, Miki; Nishihara, Hiroshi; Aramaki, Kunitsugu ^[1]

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1. Keio Univ., Yokohama (Japan). Dept. of Chemistry

A self-assembled monolayer of 11-mercapto-1-undecanol chemisorbed on the copper surface was chemically modified by reactions of the monolayer with alkyltrichlorosilane and water to form alkylsiloxane polymer in the film. The alkylsiloxane modified monolayers were characterized by x-ray photoelectron (XPS) and Fourier transform infrared reflection spectroscopies (FTIRAS) and impedance, polarization, and contact angle measurements. A structure of the cross-linked alkylsiloxane modified layer adsorbed on the copper surface was confirmed by XPS and FTIRAS. The protection abilities of alkylsiloxane modified 11-mercapto-1-undecanol layers against copper corrosion obtained in aerated 0.5M Na[sub 2]SO[sub 4] by impedance and polarization measurements were higher than those of alkanethiol monolayers. The highest values of the protection abilities were obtained in the region of the carbon number n between 4 and 8 in alkyltrichlorosilanes (n = 1 [approximately] 18). The lower protection ability at n = 18 may be attributed to disordered arrangement of the self-assembled layer on the surface. The contact angle of the copper surface covered with the 11-mercapto-1-undecanol monolayer increased by chemical modification with alkyltrichlorosilane and water but a clear relation between the contact angle and n could not be obtained in this study.

• OSTI ID: 7018905
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:8; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
COATINGS
COPPER
CORROSION INHIBITORS
CORROSION PROTECTION
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
METALS
MODIFICATIONS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PROTECTIVE COATINGS
SEMICONDUCTOR DEVICES
SILANES
SILICON COMPOUNDS
SILOXANES
TRANSITION ELEMENTS