Fabrication of nanocapsules with Au particles trapped inside carbon and silica nanoporous shellsElectronic supplementary information (ESI) available: experimental section and TEM image of Au-entrapping silica capsules-1. See http://www.rsc.org/suppdata/cc/b2/b211714b/

Carbon capsules with hollow cores and mesoporous shells (HCMS) containing entrapped Au particles were prepared by template replication from solid core/mesoporous shell silica spheres with encapsulated Au particles. The resulting HCMS carbon capsules were then nanocast one step further to generate Au-trapping hollow core silica capsules with nanostructured shells.