Colloidal synthesis of metallodielectric Janus matchsticks.

We present a gram-scale synthesis of metallodielectric Janus matchsticks, which feature a gold-coated silica sphere and a silica rod. SiO 2 Janus matchsticks are synthesized in one batch by growing amine-functionalized SiO 2 spheres at the end of SiO 2 rods. Gold deposition on the spheres produces Au-SiO 2 Janus matchsticks with an aspect ratio controlled by the rod length. The metallodielectric Janus matchsticks, produced by scalable colloidal synthesis, hold great potential as functional colloidal materials.