Small angle neutron and X-ray studies of carbon structures with metal atoms

3rd International Conference on Small Angle Neutron Scattering dedicated to the 80 anniversary of Yu.M. Ostanevich

Lebedev, V.T.^1 ; Szhogina, A.A.^1 ; Yu Bairamukov, V.^1

Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina, Leningrad distr

188300, Russia^1

关键词: Aggregation numbers;    Carbon structures;    Globular clusters;    High temperature process;    Metal structures;    Molecular precursor;    Porous matrixs;    Small angle neutron;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/848/1/012005/pdf
DOI  :  10.1088/1742-6596/848/1/012005

来源: IOP

【 摘 要 】

Encapsulation of metal atoms inside carbon single-wall cages or within multi-layer cells has been realized using molecular precursors and high temperature processes transforming them into desirable structures. Endohedral fullerenols Fe@C60(OH)Xwith 3d-metal (iron) have been studied by SANS in aqueous solutions where they form stable globular clusters with radii RC∼ 10-12 nm and aggregation numbers NC∼ 104. This self-assembly is a crucial feature of paramagnetic fullerenols as perspective contrast agents for Magneto-Resonance Imaging in medicine. Cellular carbon-metal structures have been created by the pyrolysis of diphthalocyanines of lanthanides and actinides. It was established that these ultra porous matrices consist of globular cells of molecular precursor size (∼ 1 nm) which are aggregated into superstructures. This provides retain of metal atoms inside matrices which may serve for safety storage of spent fuel of nuclear power plants.