Atomistic and Molecular Effects on the Surface Morphology and Film Conformation of Perfluoropolyether Lubricant Layer
- Atomistic and Molecular Effects on the Surface Morphology and Film Conformation of Perfluoropolyether Lubricant Layer
- 정필승; 박세준; Sesha Hari Vemuri; Myung S. Jhon
- Head-disk interface; Lubricant film; molecular dynamics; perfluoropolyether; Film conformation
- Issue Date
- IEEE transactions on magnetics
- , 1-5
- In this paper, we analyzed atomistic and molecular architectural effects on the film microstructure and morphological properties for the monolayer ultra thin perfluoropolyether (PFPE) lubricant film by investigating PFPEs with different molecular structure and functionality (Zdol, Ztetraol, ZTMD, TA-30) via large scale coarse-grained bead-spring molecular dynamics originating from the atomistic theory. Film surface morphology was examined by average height and root mean square roughness, and the internal clusters of functional groups on the surface was characterized by the radial distribution function of functional groups follow by the quantitative estimation of adhesion ratio and coordination number, which represents how the functional groups clusters on the surface. We also illustrate the effects of molecular structural effects on the film conformation, which is useful to molecular design criteria for head disk interface.
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