Structure of the organic shell of mesomorphous dendronized gold nanoparticles
We are engaged in the bottom-up synthesis of metamaterials based on metal nanoparticles. Through grafting with specially designed ligands we drive gold nanoparticles to self-organize into mesophase-like states. The superlattices formed by nanoparticles were characterized by SAXS, but this technique fails to differentiate the segregation of incompatible segments at the periphery, which is at the origin of mesomorphism. On the contrary, neutron scattering renders possible to detect this differentiation and was already performed in the bulk, in solution, at room temperature and on heating, at q between 0.003 and 0.3 Å-1. The definitive proof of the mesomorphism and the assignment of the phase type however require exploring the q range between 0.5 and 2 Å-1, which contains the signature of the lateral organization of mesogens and of chains. We propose here to measure our best or two best materials on the line D16 between 0.15 and 2 Å-1. This experiment should complete the structural investigation of the hybrid materials and hopefully help to elucidate and to control the self-organization of nanoparticles and the connected unconventional magnetism and other properties.
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HEINRICH Benoit; DEME Bruno; DONNIO Bertrand and GALLANI Jean Louis. (2016). Structure of the organic shell of mesomorphous dendronized gold nanoparticles. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-480
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