We present a gram-scale synthesis of metallodielectric Janus matchsticks, which feature a gold-coated silica sphere and a silica rod. SiO Janus matchsticks are synthesized in one batch by growing amine-functionalized SiO spheres at the end of SiO rods. Gold deposition on the spheres produces Au-SiO 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.
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