All chemicals involved in the solid chemistry synthesis, chemical exfoliation and capping of MnPS 3 , are commercially available and were used as received without further purification. Mn (>99.9%), P (>99.99%), S (>99.998%), KCl (>99.0%), PVP (Mw ~55.000) and PEI, branched (Mw ~25.000) were purchased from Sigma Aldrich. LiCl (Anhydrous 99%) was purchased from Alfa Aesar. MnPS 3 powder was obtained by a solid-state reaction. Stoichiometric amounts of Mn, P and S powder were mixed, pressed into a pellet and made react as in previous works. The obtained material was ground into a fine powder for characterization and further use.