= Percival Spencer Umfreville Pickering
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= Spencer Umfreville Pickering
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<Percival Spencer Umfreville Pickering> investigated emulsions stabilized by finely divided solid particles. Attachment of suitably wetted particles at an oil-<water> interface can hinder droplet merging.
The stabilization depends on particle wetting and interfacial attachment, distinguishing it from complete molecular mixing of the two liquids.<CXCVI.—Emulsions by Spencer Umfreville Pickering>[Emulsions, 1907, Journal of the Chemical Society 91, pages 2001–2021]{ref}
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