Low‐Temperature Transferred Nanostructured 2D Transition Metal Dichalcogenides by a Direct Laser Contact Sublimation Transfer Method

Abstract Here, a direct laser contact sublimation transfer (DLCST) method is proposed wherein an indirect laser heating process evaporates 2D films prepared by a conventional evaporator as target materials from donor substrates and regrows them on receiver substrates. Through this method, different 2D materials, including crystalline SnSe _x , NiSe _x , and SbSe _x, transferred onto receiver substrates have been successfully demonstrated. To fully understand the transfer mechanism and applications, the SnSe _x is selected as the target material. By precisely controlling the laser intensity and exposure time during the DLCST process, controllable morphologies from nanosheets and nanorods to nanoislands with compositions of SnSe/SnSe ₂ are verified. Finally, through this method, SnSe/SnSe ₂ nanosheets are selected to transfer to various flexible substrates, and the grown SnSe/SnSe ₂ nanosheets on copper foil (SnSe/SnSe ₂ nanosheet@copper) are applied to Na‐ion battery anodes and photodetectors. The SnSe/SnSe ₂ nanosheet@copper electrodes exhibit a stable cycling capacity, as evidenced by a capacity retention of 82 % (215 mAh g ⁻¹ ) over 100 cycles at 1 Ag ⁻¹ . Additionally, the photodetector demonstrates a rapid and robust photoresponse to 515 nm laser radiation, yielding a photocurrent peak of ≈5.6 µA within 0.115 s.