Sequential Self-Assembly of Organic Heterostructured Architectures Composed of Low-Dimensional Microcrystals

Organic heterostructured micro-/nanomaterials (OHTMs) integrating heterostructured advantages and organic material character have drawn strong attention in nanoscience and nanotechnology to meet the ever-increasing technological requirements. However, the fine synthesis of OHTMs with high spatial/angular characteristics remains challenging because of the complex epitaxial relationships of material combinations. Herein, we develop a rational sequential self-assembly strategy to synthesize the OHTMs composed of m-BCB or o-BCB one-dimensional (1D) microrods or microbelts as trunks and TPBe 2D microplates as branches via regulating the pi-pi interaction intensity (vertical bar Eo-BCB = -25.56 kcal mol(-1)vertical bar > vertical bar Em-BCB = -15.49 kcal mol(-1)vertical bar > vertical bar E-TPBe = -5.06 kcal mol(-1)vertical bar). Notably, both the lattice matching and the surface-interface energy balance prefer heterogeneous nucleation and epitaxial growth of the branch part on the surfaces of the preformed seed trunk part. Our sequential self-assembly approach demonstrates a universal avenue to precisely synthesize the OHTMs in a desired mode, which provides promising candidate for the integrated optoelectronics.