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Micro-Fluidic Diffusion Coefficient Measurement

Conference ·
OSTI ID:759

A new method for diffusion coefficient measurement applicable to micro-fluidics is pre- sented. The method Iltilizes an analytical model describing laminar dispersion in rect- anglllar ~llicro_channe]s. The Illethod ~vas verified throllgh measllremen~ of fllloresceill diffusivity in water and aqueolls polymer solutions of differing concentration. The diffll- sivity of flllorescein was measlmed as 0.64 x 10-gm2/s in water, 0.49 x 10-gm2/s in the 4 gm/dl dextran solution and 0.38 x 10-9n12/s in the 8 gnl/dl dextran solution.

Research Organization:
Sandia National Laboratories, Albuquerque, NM, and Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
OSTI ID:
759
Report Number(s):
SAND98-2239C; ON: DE00000759
Country of Publication:
United States
Language:
English

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