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Proceedings Paper

Mitigating molecular and particulate contamination via surface energy
Author(s): Mark S. Crowder; Christina Haley
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Paper Abstract

Amorphous fluorocarbon (a-C:F) thin films have been developed that protect surfaces from molecular and particulate contamination. The surface energies of the thin films are low and primarily dispersive in origin with values of energies measured to be as low as 18 mJ/m2 (17.5 dispersive, 0.5 polar). The films are transparent to visible light and have a refractive index of ~1.4. The a-C:F surface energy was found to be thermally stable when exposed to temperatures that range from 77°K to 400°C. Molecular absorption rates are significantly reduced on gold surfaces when over-coated with an a-C:F thin film. The adhesion force of particles to the a-C:F surface is low and can dramatically decrease the susceptibility of particles to adhere to surfaces over-coated with the thin film. The robust nature of the diamond-like thin films make them candidates for protecting aerospace surfaces, such as optical surfaces, from contamination.

Paper Details

Date Published: 2 September 2008
PDF: 9 pages
Proc. SPIE 7069, Optical System Contamination: Effects, Measurements, and Control 2008, 706909 (2 September 2008); doi: 10.1117/12.793442
Show Author Affiliations
Mark S. Crowder, Ball Aerospace & Technologies Corp. (United States)
Christina Haley, Ball Aerospace & Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 7069:
Optical System Contamination: Effects, Measurements, and Control 2008
Sharon A. Straka, Editor(s)

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