Abstract
Two-dimensional complete stacking bilayer molybdenum disulfide (MoS 2 ) crystals with several unconventional morphologies, including four-point star, hexagon, rhomboid, trapezoid, and pentagon, have been attained by employing the space-confined chemical vapor deposition approach. The morphology, structure, and fundamental features of as-produced domains are systematically characterized via utilizing optical microscopy, atomic force microscopy , and Raman/PL system, elucidating bilayer feature of various MoS 2 flakes. The variation of such various bilayer MoS 2 crystals is discussed based on the difference of growth rate between different sides. • Complete stacking bilayer MoS 2 flakes with various shapes have been attained via space-confined chemical vapor deposition. • Evolution of varied shapes, layer-number, and optical properties of bilayer MoS 2 flakes has been evaluated. • Possible growth mechanism of these bilayer MoS 2 flakes with various shapes has been discussed.
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