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. 2022 Mar 5;20:116. doi: 10.1186/s12951-022-01260-9

Scheme 1.

Scheme 1

A hypothetical mechanism of self-assembly formation of the spherical BA-Al NPs. (i) The carbonyl and hydroxy groups on the two BA self-assembled to form dimer by binding Al3+. (ii) The dimers are connected by intermolecular hydrogen bonds. (iii) The dimers cross-linked to form three-dimensional spherical nanoparticles