High pressures pathway toward boron-based nanostructured solids

Remi Grosjean; Yann Le Godec; Simon Delacroix; Guillaume Gouget; Patricia Beaunier; Ovidiu Ersen; Dris Ihiawakrim; Oleksandr Kurakevych; Corinne Chanéac; David Portehault

doi:10.1039/x0xx00000x

High pressures pathway toward boron-based nanostructured solids

Remi Grosjean ^{1, 2} Yann Le Godec ² Simon Delacroix ^{1, 2} Guillaume Gouget ¹ Patricia Beaunier ³ Ovidiu Ersen ⁴ Dris Ihiawakrim ⁴ Oleksandr Kurakevych ² Corinne Chanéac ¹ David Portehault ¹

1 LCMCP - Laboratoire de Chimie de la Matière Condensée de Paris

2 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie

3 LRS - Laboratoire de Réactivité de Surface

4 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg

Abstract : Inorganic nanocomposites made of an inorganic matrix containing nanoparticle inclusions provide materials of advanced mechanical, magnetic, electrical properties and multifunctionality. The range of compounds that can be implemented in nanocomposites is still narrow and new preparation methods are required to design such advanced materials. Herein we describe how the combination of nanocrystal synthesis in molten salts, with subsequent heat treatment at pressures in the GPa range, gives access to a new family of boron-based nanocomposites. With the case studies of HfB2/-HfB2O5 and CaB6/CaB2O4 (IV), we demonstrate by X-Ray Diffraction and thorough (Scanning) Transmission Electron Microscopy the crystallization of borate matrices into rare compounds and unique nanostructured solids, while metal boride nanocrystals remain dispersed in the matrix and maintain small sizes below 30 nm, thus demonstrating a new multidisciplinary approach toward nanoscaled heterostructures.

Document type :

Journal articles

Domain :

Chemical Sciences / Material chemistry

Chemical Sciences / Inorganic chemistry

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https://hal.sorbonne-universite.fr/hal-01883827
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Document(s) archivé(s) le : Saturday, December 29, 2018 - 3:11:45 PM

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