Two-dimensional (2D) materials often have magnetic and electronic properties that differ from their bulk analogs. Chemically modifying 2D materials has the potential to further tune their properties for applications in electronics and spintronics. One such material is CrSBr, which is a ferromagnetic 2D material with a notably high Curie temperature of 146 K. In this material, the Br atoms project from the surface, making it promising for substitution reactions. In this project we seek to selectively substitute the Br on one face of CrSBr, forming a Janus material, in order to tune the magnetic and electronic properties, such as increasing the Curie temperature. Raman spectra of the surface-functionalized product contain a new peak that is characteristic of the substitution product.

Surface modification of CrSBr to form two-dimensional Janus materials

ACS Spring 2022

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