Sequential Self-Assembly of 1D Branched Organic Homostructures with Optical Logic Gate Function
Yi-Chen Tao1, Sheng Peng2, Xue-Dong Wang,1,* Zhi-Zhou Li1, Xue-Jin Zhang,2,* and Liang-Sheng Liao1,3,*
1Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China
2National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures and Key Laboratory of Modern Acoustics and School of Physics, Nanjing University, Nanjing 210093, P. R. China
3Institute of Organic Optoelectronics, Jiangsu Industrial Technology Research Institute (JITRI), Wujiang, Suzhou, Jiangsu 215211, P. R. China
Integrated microstructures composed of organic micro/nanocrystals have gained impressive interest recently as probable candidate for constructing optoelectronic circuits. However, the fabrication of these designed composite structures remains a huge challenge. Herein, the sequentially self-assembled branched homostructures based on 1D single-crystalline organic microrods of 1,4-bis((E)-4-iodostyryl)-2,5-dimethoxybenzene through the facile solution-processing approach are demonstrated. The growth mechanism of these dendritic microcrystals with an angle of 75° between trunk and branch is attributed to the facet-selective growth principle between the (020) and (110) crystal planes, for which the interplanar spacing mismatch rate is as low as 6.1%. More significantly, this branched microstructure exhibits an asymmetric optical waveguide and can function as an optical logic gate with an ON/OFF ratio of 10.5. Therefore, the approach to build this organized multilevel structure could provide further applications as building blocks in integrated optoelectronic circuits.