Ein neuer Weg zu kolloidalen,UV‐lumineszenten Silicium‐Nanopartikeln

For the last decade, there has been a growing interest in silicon nanoparticles smaller than 5 nm in diameter because of their luminescence properties. Here, we present a new approach for the fabrication of such particles. Starting with larger nanoparticles from industrial production, a combined treatment with anhydrous hydrogen fluoride and 1‐alkenes leads to alkylated Silicon nanoparticles in the size range necessary for luminescence. In nonpolar solvents, these particles are colloids, which do not precipitate for a long time. During one‐pot reactions, the size decrease of the crystalline silicon core is mediated by the intermediary presence of H₂O₂. In this paper, we describe the reaction conditions of this new path to colloidal silicon nanoparticles and discuss their structure as seen in TEM images, their surface chemistry and luminescence properties.