Hexagonal boron nitride (h-BN) is isostructural and isoelectronic to graphene and clenches remarkable physical properties and chemical stability. Manipulating the surface of h-BN via functionalization of metal carbonyls without corrupting its lattice structure holds promise for sensors and quantum optoplasmonics.  While current efforts are centered on covalent functionalization of localized π electron system of boron nitride nanotubes, we here propose a non-covalent functionalization of h-BN’ basal surface in solution-phase without corrupting its properties. Further, it is shown that the functionalized h-BN hosts metal nanoparticles offering sites for interaction and interfacing with other chemical or biochemical systems. Chromium hexacarbonyl Cr(CO)6 was used for non-destructive functionalization of h-BN. From scanning Raman analysis of h-BN, it is observed that the E2g phonon mode upshifts by about ~5 cm-1 (blue shift), indicating the grafting of the Cr(CO)3 moiety on functionalized h-BN, while the X-ray photoelectron spectroscopic analysis clearly shows the B-Cr and N-Cr bonding energies in B1s and N1s spectrum, respectively.

Eta-6 surface functionalization of hexagonal boron nitride films

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ACS Fall 2022

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