The applications of exfoliated MoS are limited by its inert surface and poor interface. We have activated the surface of exfoliated 2H-MoS by reacting it with NaBH , forming an n-doped material as demonstrated by a negative zeta-potential value ζ=-25 mV and a 20 nm (0.05 eV) red-shift in its photoluminescence spectrum. The novel material's spectral properties were consistent with pristine 2H-MoS (as determined by HR-TEM, XPS, pXRD, DRIFT, TGA, and Raman spectroscopy). Importantly, it was readily dispersed in H O unlike 2H-MoS . Its dispersibility properties were explored for a variety of solvents and could be directly correlated with the relative permittivity of the respective solvents. The charged 2H-MoS reacted readily with an organo-iodide to deliver functionalized 2H-MoS . Our approach delivers aqueous dispersions of semiconducting 2H-MoS , without additives or chemical functionalities, and allows for controlled and facile functionalization of 2H-MoS opening multiple new avenues of semi-conducting MoS application.
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