Loget G., Lee T.-C., Taylor R. W., Mahajan S., Nicoletti O., Jones S. T., Coulston R. J., Lapeyre V., Garrigue P., Midgley P. A., Scherman O. A., Baumberg J. J., Kuhn A.,
Small 2012, 8, 2698-2703.

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 silver ion reduction being triggered by the electron beam, the progress of the transformation can be directly monitored with a transmission electron microscope.

Small2012 TOC