Hierarchically aluminum oxides

The second hierarchical level of the nanostructure (1—4nm) can be a rather complicated stmcture. It stabilizes the nanosized carrier by modifying the surface with biocompatible coverage (polyacrylamide, silica, hydroxyapatite, titanium, or aluminum oxide, etc.). The presence of a modifying layer retains a high specific surface of the nanoparticles and allows the necessary chemical functionalization, for example, with hydroxyl, carboxyl, thiol, and amino groups. 

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