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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 6 — Feb. 20, 2005
  • pp: 912–915

Optically monitored dip coating as a contactless viscometry method for liquid films

Alexandre F. Michels, Thiago Menegotto, and Flavio Horowitz  »View Author Affiliations


Applied Optics, Vol. 44, Issue 6, pp. 912-915 (2005)
http://dx.doi.org/10.1364/AO.44.000912


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Abstract

Real-time interferometric monitoring of the dip coating process is applied to the study of properties of flowing liquids. Nonvolatile Newtonian oils are considered, allowing validity of a simple model after the steady state is reached where film physical thickness depends on time as t^-½. Measurement of two distinct mineral oil standards, under several withdrawing speeds, resulted in kinematic viscosities of 1.17 ± 0.03 and 9.9 ± 0.2 S (1S = 1 cm^2/s). Agreement of these results with nominal values from the manufacturer suggests that interferometric monitoring of dip coating may become a valuable method for accurate, contactless viscometry of liquid films. Advantages and present limitations are discussed.

© 2005 Optical Society of America

OCIS Codes
(260.3160) Physical optics : Interference
(310.3840) Thin films : Materials and process characterization
(310.6860) Thin films : Thin films, optical properties

Citation
Alexandre F. Michels, Thiago Menegotto, and Flavio Horowitz, "Optically monitored dip coating as a contactless viscometry method for liquid films," Appl. Opt. 44, 912-915 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-6-912


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References

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