High-pressure, high temperature synthesis of a mesoporous α-quartz/bismuth nanowire composite Auteur(s): Zhao Yixuan, Talbi Gaël, Clement S., Toulemonde Pierre, Hansen Thomas, Cambon Martine, Cambon Olivier, Beaudhuin Mickael, Viennois Romain, Haines Julien (Article) Publié: Solid State Sciences, vol. 101 p.106125 (2020) Texte intégral en Openaccess : Ref HAL: hal-02498343_v1 DOI: 10.1016/j.solidstatesciences.2020.106125 WoS: 000530687900001 Exporter : BibTex | endNote Résumé: High temperature, high pressure conditions were used to insert liquid bismuth in 4-6 nm diameter amorphous silica nanotubes. A combination of transmission electron microscopy and neutron powder diffrac-tion indicate that the final composite consists in 5-6 nm semi-conducting Bi nanowires confined in insulating mesoporous -quartz. Such a nanostructured material could be of considerable interest for thermo-electric applications. HIGHLIGHTS: Bismuth was inserted into 4-6 nm silica nanotubes under high-pressure, high-temperature conditions The host amorphous nanotubes crystallize in the form of -quartz The obtained nanocomposite consists of 5-6 nm Bi nanowires imbedded in mesoporous -quartz The formation of Bi nanowires modifies their physical properties compared to bulk Bi |