Two dimensional organic lateral heterostructures (2D OLHs) have great appeal in the preparation of functional materials. However, it is difficult to control the nucleation, growth, and orientation of two different components.
Recently, Qiang Lv Lv, Xue Dong Wang, Min Zheng, Liang Sheng Liao, and others from Soochow University published a paper in Nature Chemistry, in which they synthesized two-dimensional organic heterostructures 2D OLHs using a combination of liquid-phase growth and gas-phase growth methods, using perylene and a derivative of perylene formaldehyde as raw materials. The lateral size of these structures is approximately 20 μ m, and the thickness can be adjusted within the range of 20-400nm.
The growth behavior of spiral dislocations in 2D crystals shows the helical arrangement of atoms within the lattice, which avoids the volume expansion and contraction of organic lateral heterostructures OLH, thereby minimizing lateral connection defects. Based on the gas-phase growth method, selective control of 2D crystal nucleation and sequential growth has resulted in the structural inversion of 2D organic heterostructure 2D OLH.
The obtained transverse heterostructure OLH exhibits excellent optical transmission capability and tunable spatial exciton conversion, which can be used for photon applications. This synthesis strategy can be extended to other families of organic polycyclic aromatic hydrocarbons, such as other pyrene and naphthalene derivatives
Figure 1: Two step strategy for synthesizing two-dimensional organic lateral heterostructures with structural inversion, 2D OLHs.
Characterization of the transverse heterostructures of ne (Pe) and 3-perylenecarboxaldehyde (PeO). 2: peryle
Figure 3: Characterization of PeO-Pe Lateral Heterostructure.
Figure 4: Optical applications of transverse heterostructures.
Figure 5: General synthesis of organic lateral heterostructure OLHs.
Editor: Sichuan Jinzhongde Science and Technology Research Institute
