Ole-ain't: Trialkyl oxonium salts are universal reagents for native-ligand stripping of carboxylate- (e.g., oleate-), phosphonate-, and amine-passivated nanocrystal thin films and dispersions to give bare or BF4−/DMF-passivated surfaces. Meerwein-activated PbSe nanocrystal thin films (see picture) show hole mobilities of about 2–4 cm2 V−1 s−1, which suggest applications of this process in fabricating high-performance devices.
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