摘要
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 SnSex, NiSex, and SbSex, transferred onto receiver substrates have been successfully demonstrated. To fully understand the transfer mechanism and applications, the SnSex 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/SnSe2 are verified. Finally, through this method, SnSe/SnSe2 nanosheets are selected to transfer to various flexible substrates, and the grown SnSe/SnSe2 nanosheets on copper foil (SnSe/SnSe2 nanosheet@copper) are applied to Na-ion battery anodes and photodetectors. The SnSe/SnSe2 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 approximate to 5.6 mu A within 0.115 s.