High-Energy Al/CuO Nanocomposites Obtained by DNA-Directed Assembly

Fabrice Severac (1) , Pierre Alphonse (2) , Alain Estève (3) , Aurélien Bancaud (4) , Carole Rossi (1)

1 LAAS - Laboratoire d'analyse et d'architecture des systèmes
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 LAAS-NEO - Équipe Nano-ingénierie et intégration des oxydes métalliques et de leurs interfaces
4 LAAS-MILE - Équipe Micro-Nanofluidique pour les sciences de la vie et de l’environnement

Over the next few years, it is expected that new, energetic, multifunctional materials will be engineered. There is a need for new methods to assemble such materials from manufactured nanopowders. In this article, we demonstrate a DNA-directed assembly procedure to produce highly energetic nanocomposites by assembling Al and CuO nanoparticles into micrometer-sized particles of an Al/CuO nanocomposite, which has exquisite energetic performance in comparison with its physically mixed Al/CuO counterparts. Using 80 nm Al nanoparticles, the heat of reaction and the onset temperature are 1.8 kJ g−1 and 410 °C, respectively. This experimental achievement relies on the development of simple and reliable protocols to disperse and sort metallic and metal oxide nanopowders in aqueous solution and the establishment of specific DNA surface-modification processes for Al and CuO nanoparticles. Overall, our work, which shows that DNA can be used as a structural material to assemble Al/Al, CuO/CuO and Al/CuO composite materials, opens a route for molecular engineering of the material on the nanoscale.

Domaines: Matériaux

Fabrice Severac, Pierre Alphonse, Alain Estève, Aurélien Bancaud, Carole Rossi. High-Energy Al/CuO Nanocomposites Obtained by DNA-Directed Assembly. Advanced Functional Materials, 2012, 22 (2), pp.323-329. ⟨10.1002/adfm.201100763⟩. ⟨hal-01682512⟩