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. Author manuscript; available in PMC: 2009 Apr 5.
Published in final edited form as: Lab Chip. 2005 Apr 27;5(6):611–618. doi: 10.1039/b417245k

Fig. 2.

Fig. 2

(a) The concentration gradient was modeled in MATLAB assuming a flow rate of 1 μl min−1. Cross sectional profiles were validated experimentally at (b) 1 mm, (c) 4 mm, and (d) 8 mm down the microchannel. Circles represent experimental observations, solid lines represent the model, and dashed lines represent the linear fit. A flow rate of 1 μl min−1 was used in the experiment.