Can Water Float on Oil? - Langmuir (ACS Publications)

Glass beads help robots handle small-scale chemistry. For humans and robots alike, handling tiny amounts of solid reagents—say, 1 mg or less—is fi...
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Can Water Float on Oil? Chi M. Phan,* Benjamin Allen, Luke B. Peter, Thu N. Le, and Moses O. Tade 201228104609461310.1021/la204820a Equations 3−5 in the original paper were wrongly written because of changes in notation during manuscript preparation. These mistakes do not affect the modeling results. The equations are corrected as follows: γwa cos θ1 + γow cos θ2 − γoa cos θ3 = 0

(3)

⎡γ 2 + γ 2 − γ 2⎤ ow oa ⎥ θ1 + θ2 = π − arccos⎢ wa ⎥⎦ ⎢⎣ 2γwaγow

(4)

⎡γ 2 + γ 2 − γ 2⎤ wa ow ⎥ θ1 + θ3 = arccos⎢ oa ⎢⎣ ⎥⎦ 2γoaγwa

(5)

Published: April 19, 2012 © 2012 American Chemical Society

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dx.doi.org/10.1021/la3014865 | Langmuir 2012, 28, 7089−7089