Group 1 - The research team from the University of Science and Technology of China has made significant progress in the field of new semiconductor materials, achieving controllable construction of "mosaic" heterojunctions with atomic-level flatness in two-dimensional ionic soft crystal materials [1] - This advancement opens new pathways for the development of high-performance light-emitting and integrated devices [1] - The results of this research have been published in the international academic journal "Nature" [1] Group 2 - The ability to construct heterostructures precisely in the plane of materials is crucial for exploring novel properties, developing new devices, and promoting device miniaturization [1] - Traditional techniques like photolithography often damage the structure of soft crystal semiconductors, making high-quality lateral heterointegration challenging [1] - The research team has innovatively developed a method to guide internal stress for "self-etching," allowing for precise filling of different semiconductor materials and constructing high-quality "mosaic" heterojunctions with continuous lattices and atomically flat interfaces on a single chip [1]