功能分子高精度印刷图案化用于生物定位组装研究

High-precision patterning and co-assembly of functional molecules serve as the key problem between different materials with good performance and optoelectronic devices with high integration. However, there still exist problems for the current nano-patterning strategies, including complicated process, less structural integration and low precision of interface regulation. Based on constructing micro-structured templates for regulating ink droplet wetting and dewetting behavior, this project focuses on achieving high-precision micro-nano pattern combining the structure with the function. It will inject some new insights on droplet-on-demand strategy for fluorescence and semiconductor molecules patterning. The molecular patterning morphologies can be controlled under the interplay between the macroscopic driving forces and the microscopic interfacial dynamics associated with the droplet manipulation process. Phototactic microorganisms (served as keys) are matched to the specific microscale location by the pentagonal photoluminescence architectures (served as locks), which can be integrated as patterned light sources for biological assembly.

功能分子的高精度图案化组装是功能材料光电器件制备与集成应用的关键问题。本项目针对目前功能分子图案化工艺复杂、精度低等问题，提出墨滴形貌调控自成形诱导功能分子自组装图案化的新思路，构筑调控墨滴浸润与去浸润行为的微模板，实现印刷组装功能分子的高精度微纳图案。利用微精细结构调控墨滴动态行为，功能分子在界面处表面张力与分子间相互作用力共同作用下，实现发光强度均一的微纳图形阵列制备。同时，利用趋光微生物的特性，将荧光分子印刷组装为与微生物形状匹配的发光图案，利用锁匙作用实现微米级生物定位组装，形成图形结构与功能综合应用。

本项目从功能分子的高精度图案化组装出发，通过构筑微模板-含功能材料墨滴-基底的三明治夹层印刷系统，利用微精细结构调控墨滴动态行为，功能分子在界面处表面张力与分子间相互作用力共同作用下，实现发光强度均一的微纳图形阵列制备；基于印刷的光致发光图案化阵列，利用趋光微生物的特性和微生物形状匹配的锁匙作用，实现微米级生物定位组装应用，并基于此，发展了普适的功能分子图案化印刷制造方法，初步探索了在角度依赖发光器件、高折射率光栅结构等领域的应用。发表SCI论文9篇，申请中国发明专利5项，获2020年度北京市科技新星。