Fig. 1: SMACs growth and screen process.
From: Coherently confined single-metal-atom chains in 2D semiconductors
a The formation of SMACs. Two antisymmetric MoS2 grains with appropriately adsorbed TM atoms at edges are stitching together during kinetic edge growth, resulting in the formation of SMACs at mirror twin boundary. The light blue and silver spheres represent the Mo and S atoms, respectively. The red spheres represent the TM atoms adsorbed on the edges, while the blue spheres denote the newly incorporated Mo atoms during growth. b Flowchart for screening TM elements capable of forming SMACs. 27 TM elements are evaluated through substitution doping (blue), surface clustering (green), kinetic growth barrier (orange), and experimental verification (red). Corresponding criteria and experimental result are listed on the right. The elements excluded by each criterion are marked with corresponding colors. The successful synthesis of Co, Ni, Pt and Pd SMACs was verified through our CVCD growth.
