Thermal and electron-stimulated chemistry of Fomblin–Zdol lubricant on a magnetic disk
-
- Jong-Liang Lin
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
-
- C. Singh Bhatia
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
-
- John T. Yates
- Surface Science Center, Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
抄録
<jats:p>The thermal and electron-induced decomposition of Fomblin–Zdol lubricant on a rigid magnetic disk with a hard carbon overcoat are studied by temperature-programmed reaction/desorption spectroscopy and electron stimulated desorption. The thermal spectroscopy shows two desorption features peaked at 640 and 700 K resulting from decomposition of the Fomblin–Zdol molecules. The threshold temperature for dissociation of the Fomblin–Zdol molecule is at 500–550 K in accordance with the known thermal stability of the free molecule. HF originating from thermal reactions with either surface OH or surface CH groups is a prominent desorption product. Electron impact also causes Fomblin–Zdol dissociation. Two efficient mechanisms for electron impact dissociation have been resolved separately above and below the ionization threshold of ∼14 eV. The low-energy process is likely due to the formation of negative ions followed by dissociation (dissociative electron attachment) and has a cross section of ∼2×10−16 cm2. These results show that Fomblin–Zdol as a lubricant on a magnetic disk is inherently unstable thermally and in the presence of triboelectrons.</jats:p>
収録刊行物
-
- Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
-
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 13 (2), 163-168, 1995-03-01
American Vacuum Society
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1363107370800762496
-
- NII論文ID
- 30020303357
-
- DOI
- 10.1116/1.579393
-
- ISSN
- 15208559
- 07342101
-
- データソース種別
-
- Crossref
- CiNii Articles