取得的创新性研究成果包括：（1）非共轭型二维聚合物的界面合成——单层表面活性剂辅助界面合成多种结晶型二维聚合物和LB膜技术合成单层二维聚酰亚胺；（2）共轭型二维聚合物的合成——以二维聚吡咯为例，在界面组装质子化醌式结构的一维聚吡咯形成二维组装体；（3）二维聚合物高效电荷传输行为的表征——基于结构规整的二维聚合物，通过超快光谱探索二维聚合物中的高效电荷传输行为。总之，利用原创性的方法，实现了高质量的样品的合成和制备；系统研究了二维聚合物的结构和性能；为水界面化学的深入理解提供了全新的视角和实验方法，推动了二维聚合物构效关系探索的边界，将有助于开发新型高性能电子和光电器件。迄今为止，已发表研究论文19篇，其中第一作者在包括Nat. Chem；Angew. Chem. Int. Ed. 和Adv. Mater等杂志发表论文7篇，申请并授权欧洲专利1项。
代表性论文：
1. Liu, Kejun; Qi, Haoyuan; Dong, Renhao; Shivhare, Rishi; Addicoat, Matthew; Zhang, Tao; Sahabudeen, Hafeesudeen; Heine, Thomas; Mannsfeld, Stefan; Kaiser, Ute; Zheng, Zhikun; Feng, Xinliang. On-water surface synthesis of crystalline, few-layer two-dimensional polymers assisted by surfactant monolayers, Nat. Chem., 2019, 11(11): 994-1000.
2. Liu, Kejun; Li, Jiang; Qi, Haoyuan; Hambsch, Mike; Rawle, Jonathan; Vázquez, Adrián Romani; Nia, Ali Shaygan; Pashkin, Alexej; Schneider, Harald; Polozij, Miroslav. A two-dimensional polyimide-graphene heterostructure with ultra-fast interlayer charge transfer, Angew. Chem. Int. Ed., 2021, 60(25): 13859-13864.
3. Liu, Kejun; Rehault, Julien; Liang, Baokun; Hambsch, Mike; Zhang, Yingying; Seçkin, Sezer; Zhou, Yunxia; Shivhare, Rishi; Zhang, Peng; Polozij, Miroslav; König, Tobias A. F.; Qi, Haoyuan; Zhou, Shengqiang; Fery, Andreas; Mannsfeld, Stefan C. B.; Kaiser, Ute; Heine, Thomas; Banerji, Natalie; Dong, Renhao; Feng, Xinliang. A quasi-2D polypyrrole film with band-like transport behavior and high charge carrier mobility, Adv. Mater., 2023, 35(40): 2303288.
4. Liu, Kejun; Wang, Lihuan; Dong, Renhao. Two-dimensional conjugated polymer films via liquid-interface-assisted synthesis toward organic electronic devices, J. Mater. Chem. C, 2020, 8(31): 10696-10718.
5. Liu, Kejun; Pastukhova, Nadiia; Pavlica, Egon; Bratina, Gvido; Feng, Xinliang. Air-Water Interface-Assisted Synthesis and Charge Transport Characterization of Quasi-2D Polyacetylene Films with Enhanced Electron Mobility via Ring-Opening Polymerization of Pyrrole, 2024. arXiv:2404.05402.
6. Prasoon, Anupam; Yu, Xiaoqing; Hambsch, Mike; Bodesheim, David; Liu, Kejun; Zacarias, Angelica; Nguyen, Nguyen Ngan; Seki, Takakazu; Dianat, Aerzoo; Croy, Alexander; Cuniberti, Gianaurelio; Fontaine, Philippe; Nagata, Yuki; Mannsfeld, Stefan C. B.; Dong, Renhao; Bonn, Mischa; Feng, Xinliang. Site-selective chemical reactions by on-water surface sequential assembly, Nat. Commun., 2023, 14(1): 8313.
7. Seki, Takakazu; Yu, Xiaoqing; Zhang, Peng; Yu, Chun-Chieh; Liu, Kejun; Gunkel, Lucas; Dong, Renhao; Nagata, Yuki; Feng, Xinliang; Bonn, Mischa. Real-time study of on-water chemistry: Surfactant monolayer-assisted growth of a crystalline quasi-2D polymer, Chem, 2021, 7(10): 2758-2770.
8. Sahabudeen, Hafeesudeen; Qi, Haoyuan; Ballabio, Marco; Položij, Miroslav; Olthof, Selina; Shivhare, Rishi; Jing, Yu; Park, SangWook; Liu, Kejun; Zhang, Tao; Ma, Ji; Rellinghaus, Bernd; Mannsfeld, Stefan; Heine, Thomas; Bonn, Mischa; Novas, Enrique C; Zheng, Zhikun; Kaiser, Ute; Dong, Renhao; Feng, Xinliang. Highly crystalline and semiconducting imine-based two-dimensional polymers enabled by interfacial synthesis, Angew. Chem. Int. Ed., 2020, 132(15): 6084-6092.