Direct Visualization of Symmetry Breaking During Janus Nanoparticle Formation (pages 2698–2703)
Gabriel Loget, Tung C. Lee, Richard W. Taylor, Sumeet Mahajan, Olivia Nicoletti, Samuel T. Jones, Richard J. Coulston, Véronique Lapeyre, Patrick Garrigue, Paul A. Midgley, Oren A. Scherman, Jeremy J. Baumberg and Alexander Kuhn
Version of Record online: 3 JUL 2012 | DOI: 10.1002/smll.201200546
The straight-forward synthesis of Janus nanoparticles composed of Ag and AgBr is reported. For their formation, cucurbit[n]uril (CB)-stabilized AgBr nanoparticles are first generated in water by precipitation. Subsequent irradiation with an electron beam transforms a fraction of each AgBr nanoparticle into Ag0, leading to well-defined Janus particles, stabilized by the binding of CB to the surface of both AgBr and Ag0. With the formation being triggered by the electron beam, the process can be monitored directly with a transmission electron microscope.