SURFACE PROPERTIES OF CARBONIC THIN FILMS PREPARED BY ELECTROCHEMICAL DEPOSITION

Aurel V. Andrei 2Fulger Manuela 2Diaconu Constantin 2Andrei V. Elisabeta 1

1. National Institute for Research and development in Microtechnologies (IMT-Buchares), P.O.Box 38-160, Bucharest 023573, Romania
2. INSTITUTE FOR NUCLEAR RESEARCH (ICN), CAMPULUI, NO.1, PITESTI 115400, Romania

Abstract

Thin films of diamond-like (DLC) and graphitic materials are characterized by low thermal expansion coefficients, high thermal and electrical conductivities and chemical inertness. DLC, in addition, exhibits extreme hardness.
A technique of carbon film synthesis based on electrochemical process was used. A solution of acetylene in liquid ammonia was employed as the electrolyte; films were deposited on the various substrates.
We report the characterization by XPS and XAES of the diamond vs graphite nature of amorphous carbon films deposited; the outstanding problem is the determination of the ratio of carbon atoms with diamond-like sp3 tetrahedral bonding to carbon atoms with carbon graphitic sp2 trigonal boding.
The electochemical behaviour of the thin films is studied by Electrochemical Impedance Spectroscopy.
The electrochemical processes of electrodeposition are analysed, to understand the relationship between properties of the deposited carbonic thin films (actual film microstructure) and the deposition experiment parameters.

Presentation: poster at E-MRS Fall Meeting 2005, Symposium F, by Aurel V. Andrei
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-20 09:38
Revised:   2009-06-07 00:44
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