Characterisation and nano‐friction behaviour of molecular deposition films

Abstract

PR Chli ~r iThe structure and the nano-friction behaviour of a new kind of ultrathin film, a molecular deposition (MD) film, on a n Au substrate were studied. The MD film is formed by the electrostatic attraction between opposite charges of cationic and anionic compounds, and a multilayer film can be built thi{as.:ji dternating deposition of bipolar cationic and anionic compounds. Monolayer, bilayer, trilayer, and tetralayer MD films on Au substrates were examined. MD films with a n alkyl terminal group were also investigated. It was found that while the MD film on a n Au substrate reduced the friction, its nano-friction behaviour was unstable because of the active terminal group.However, if the MD film was formed with a n alkyl terminal group, its nano-friction behaviour became stable and its friction decreased markedly. Therefore, this film termination method could contribute to the nano-tribological application of MD films. Abstract

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