Gd-doped BNNTs as T 2 -weighted MRI contrast agents

This work describes, for the first time, doping of boron nitride nanotubes (BNNTs) with gadolinium (Gd@BNNTs), a stable functionalization that permits non-invasive BNNT tracking via magnetic resonance imaging (MRI). We report the structure, Gd loading, and relaxometric properties in water suspension at 7 T of Gd@BNNTs, and show the behaviour of these nanostructures as promising T 2 -weighted contrast agents. Finally, we demonstrate their complete biocompatibility in vitro on human neuroblastoma cells, together with their ability to effectively label and affect contrast in MRI images at 7 T.

Gianni Ciofani, Adriano Boni, Lucia Calucci, Claudia Forte, Alessandro Gozzi, Barbara Mazzolai and Virgilio Mattoli

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