Electric-field-induced handedness in an achiral surface state via a chiral ionic liquid-gated transistor

Chirality manipulation has recently attracted attention as a promising approach for developing novel functionalities in materials. Among various strategies, the chirality-transfer phenomenon at the interfaces between chiral molecules and inorganic materials is particularly fascinating because it enables the induction of chirality into intrinsically achiral systems without forming strong chemical bonds with the adsorbed molecules on the interface. In this study, we demonstrate that a chiral state can be electrically induced on an achiral MoS₂ surface through ion-gating using an electric double-layer transistor (EDLT) with chiral ionic liquids. In the electrically induced conductive interface formed via EDLT operation, the emergence of chirality was confirmed by detecting two types of chirality-dependent charge-transport phenomena: chirality-induced spin selectivity and electrical magneto-chiral effect. Electrical control of chirality via proximity effect of chiral molecules is expected to open up a new research field, which we term “chiral iontronics”.