Space-Confined Strategy toward Large-Area Two-Dimensional Single Crystals of Molecular Materials

作者：Wang, Qingqing; Yang, Fangxu; Zhang, Yu; Chen, Mingxi; Zhang, Xiaotao; Lei, Shengbin; Li, Rongjin^*; Hu, Wenping^*

来源：Journal of the American Chemical Society, 2018, 140(16): 5339-5342.

DOI：10.1021/jacs.8b01997

• DER-WAALS HETEROSTRUCTURES
• CETYLTRIMETHYLAMMONIUM BROMIDE
• AIR/WATER INTERFACE
• SURFACE-TENSION
• AIR INTERFACE
• DESIGN
• FILMS
• SEMICONDUCTORS
• GRAPHENE
• EPITAXY

Two-dimensional molecular crystals (2DMCs) are a promising candidate for flexible and large-area electronics. Their large-area production requires both low nuclei density and 2D crystal growth mode. As an emerging type of material, their large-area production remains a case-by-case practice. Here we present a general, efficient strategy for large-area 2DMCs. The method grows crystals on water surface to minimize the density of nuclei. By controlling the interfacial tension of the water/solution system with a phase transfer surfactant, the spreading area of the solvent increases tens of times, leading to the space confined 2D growth of molecular crystals. As-grown sub centimeter-sized 2DMCs floating on the water surface can be easily transferred to arbitrary substrates for device applications.

• 出版日期2018-4-25
• 单位天津大学