在原子层中写入电子相

An atomically thin material converts into crystals with different electronic properties Hyun-Young Choi and Gwan-Hyoung Lee Atomically thin two-dimensional (2D) semiconductors can overcome physical limits of conventional silicon electronics, making possible smaller and more energy-efficient devices. However, their structural fragility and smooth surfaces make integrating insulators and electrical contacts difficult. The absence of dangling bonds at the crystal surfaces causes uneven growth of subsequent layers of materials, compromising dielectric integrity and creating resistive barriers to charge injection. In addition, transferring prefabricated crystals on these 2D surfaces may leave polymer residues, creating defects (1, 2). On page 340 of this issue, Min et al. …