The present invention, non-persistent support material further described herein, and nanoparticles containing metallic silver particles on the surface of the support material production of the nanoparticles and the composite material composite material comprising said nanoparticles and to the use of the nanoparticles and composites.本発明は、本明細書中に更に述べる非持続性支持材料、及び前記支持材料の表面上の金属銀粒子を含むナノ粒子;前記ナノ粒子を含む複合材料;前記ナノ粒子及び複合材料の製造、並びに前記ナノ粒子及び複合材料の使用に関する。