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Effects of Organic Film Morphology on the Formation of Rb Clusters on Surface Coatings used in Alkali Metal Atom Magnetometer Cells

Published

Author(s)

D. M. Rampulla, N Oncel, E Abelev, Y Yi, Svenja A. Knappe, S Bernasek

Abstract

Coated atomic resonance cells are used in atomic magnetometers, atomic clocks, and magneto-optical traps. Recent work has shown that there is a significant difference in surface relaxation rates of spin-polarized alkali atoms on an OTS monolayer coating as compared to an OTS bilayer coating. The morphology and composition of Rb vapor-exposed monolayer and bilayer films of octadecyltrichlorosilane (OTS) has been studied with atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). On OTS monolayers, numerous small (less than or equal to} 500 nm wide) Rb islands were found to nucleate at the boundaries of the approximately} 1 – 2 υm wide organic domains. However, on OTS bilayers, singular large (approximately} 3 υm wide) Rb islands were found. These results suggest that alkali island formation as mediated by surface structure could be an important parameter affecting the anti-relaxation behavior of organic coating films used in atomic magnetometer and clock resonance cells.
Citation
Journal of Applied Physics
Volume
94

Keywords

surface coatings, alkali atoms, magnetometers, OTS, silanes

Citation

Rampulla, D. , Oncel, N. , Abelev, E. , Yi, Y. , Knappe, S. and Bernasek, S. (2009), Effects of Organic Film Morphology on the Formation of Rb Clusters on Surface Coatings used in Alkali Metal Atom Magnetometer Cells, Journal of Applied Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842542 (Accessed April 19, 2024)
Created December 31, 2008, Updated October 12, 2021