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. 2015 Aug 11;5:12908. doi: 10.1038/srep12908

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(a) Water and oil contact angle (CA) in air, (b) underwater oil CA and work of adhesion. Insets are snapshots of oil droplets immediately prior to detachment from the injection needle before (lower inset) and after (upper inset) UV irradiation. (c) X-ray photoelectron spectroscopy analysis before (upper graph) and after (lower graph) UV irradiation.