Here it is:
Nanoemulsions obtained via bubble-bursting at a compound interface
Jie Feng, Matthieu Roché, Daniele Vigolo, Luben N. Arnaudov, Simeon D. Stoyanov, Theodor D. Gurkov, Gichka G. Tsutsumanova & Howard A. Stone
Nature Physics (2014) doi:10.1038/nphys3003
Received 21 November 2013 – Accepted 22 May 2014 – Published online 13 July 2014