Development of a Spontaneous Immersion Process for Deposition of Cerium Oxide Coatings on Copper Substrates

Abstract

A spontaneous immersion process has been developed to deposit cerium oxide/hydroxide coatings on copper foil substrates. The immersion process selectively deposits adherent cerium oxide/hydroxide coatings on exposed copper areas using an aqueous, room temperature process. The development and optimization of process parameters that result in film deposition and the characterization of the coatings are described. The effect of process parameters and bath additives with respect to coating morphology and formation are discussed. Cerium oxide/hydroxide coatings on copper foils were found to consist primarily of tetravalent cerium compounds by X-ray photoelectron spectroscopy, exhibiting a previously unreported crystal structure by X-ray and selected area electron diffraction. The coatings were composed solely of cerium and oxygen with no copper incorporated within the coating by Auger electron spectroscopy. Deposition was very sensitive to process parameters, in particular pH and hydrogen peroxide concentration. Millimolar additions of chloride ion were found to increase the deposition rate. Uniform, adherent coatings ranging from 40 to 250 nm were produced under optimum conditions.

Department(s)

Materials Science and Engineering

Sponsor(s)

Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio)
United States. Defense Advanced Research Projects Agency
National Science Foundation (U.S.)

Keywords and Phrases

Spontaneous Immersion Process; Cerium oxides; Copper

International Standard Serial Number (ISSN)

0257-8972

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2006 Elsevier, All rights reserved.

Publication Date

01 May 2006

Link to Full Text

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