Journal Article 2D materials Review 2D ferromagnet Fe3GeTe2 2D inorganic molecular crystals Cu9S5 Research Support, Non-U.S. Gov't SbI3·3S8 active matrix bipolar junction transistors core-shell structures crack template current amplification domain wall motion double heterojunctions electromagnetic wave absorption electronics homojunctions in-plane anisotropy in‐situ experiment low-dimensional materials multifunctional devices optical images optical memory transistors optoelectronics organic semiconductors organic transistors patterning resistance second harmonic generation (SHG)