Precise synthesis of multilevel branched organic microwires for optical signal processing in the near infrared region  

具有近红外区域光信号处理功能的多级枝杈结构有机微米线的精确制备

作　　者：Chang-Cun Yan Jun-Jie Wu Wan-Ying Yang Song Chen Qiang Lv Xue-Dong Wang Liang-Sheng Liao 闫长存;吴俊杰;杨婉莹;陈松;吕强;王雪东;廖良生(Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou,215123,China;Macao Institute of Materials Science and Engineering,Macao University of Science and Technology,Taipa,Macao SAR,999078,China)

机构地区：[1]Institute of Functional Nano&Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University,Suzhou,215123,China [2]Macao Institute of Materials Science and Engineering,Macao University of Science and Technology,Taipa,Macao SAR,999078,China

出　　处：《Science China Materials》2022年第4期1020-1027,共8页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21971185,51821002);China Postdoctoral Science Foundation(2020M681707);the Collaborative Innovation Center of Suzhou Nano Science and Technology(CIC-Nano);the"111"Project of the State Administration of Foreign Experts Affairs of China。

摘　　要：Complicated multilevel micro/nanostructures have attracted great attention as essential basic components of integrated optoelectronic devices.However,precise synthesis of these well-designed micro/nanostructures is still a major challenge.In this report,a series of near-infrared emissive multilevel branched organic microwires with different integrated levels are successfully fabricated for the first time by a facile self-assembly approach based on our well designed and synthesized(2E,2′E)-1,1′-(1,5-dihydroxynaphthalene-2,6-diyl)bis(3-(4-(dimethylamino)phenyl)prop-2-en-1-one)(DHNBP).The growth mechanism is attributed to lattice matching between(100)and(010)crystal planes,with an interplanar spacing mismatch rate as low as 5.3%.Benefiting from the uniaxial oriented molecular packing mode of the crystal,the well-prepared microwires have outstanding optical properties.More significantly,the branched structures can work as optical logic gates and optical signal processors.Therefore,this synthesis method for multilevel branched microwires will potentially facilitate the development of organic integrated optoelectronics.复杂的多级微纳米结构是集成光电子器件的基本组成部分,然而其精确制备依然面临着巨大的挑战.本文基于有机近红外发光材料DHNBP,利用简易的溶液自组装方法首次成功制备了多级枝杈型有机微米线晶体.在不同的制备条件下,该类多级枝杈结构的集成度也会随之变化.生长机理研究表明(100)晶面和(010)晶面完美的晶格匹配(晶格失配率低至5.3%)起到了至关重要的作用.得益于晶体中分子的单向排列模式,无论是单一微米线还是多级枝杈型微米线都具有优异的光学性质.另外,本文进一步展示了该多级枝杈型微米线作为光学逻辑门及光信号处理器的应用.本文所展示的多级枝杈型有机微纳晶体有可能会进一步推动集成光电子器件的发展.

关 键 词：organic homostructure solution self-assembly lattice matching asymmetric optical waveguide integrated photonics 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TN256[电子电信—物理电子学]