致力于低维材料及其复合结构、异质结构的研究，在其界面性质研究及相关的柔性器件、智能器件的开发方面做了较多深入的工作。至今在Science、Adv. Mater.、Mater. Today、Nano Lett.、Adv. Funct. Mater.等期刊上共发表学术论文60余篇，论文总计被引用3000余次。已获授权的发明专利30余项。基于超顺排碳纳米管的柔性触摸屏面板和超强碳纳米管长线、基于二氧化钒的智能驱动器件、以及二维异质界面的力学和光学表征等研究成果，受到众多学术媒体的关注及国内外学者的广泛引用。主持中组部青年千人项目、基金委面上项目、青年科学基金、教育部霍英东青年教师基金等科研项目，参与科技部“纳米科技”重点专项一项。
近3年代表性学术成果：
1. H. Y. Ding, Z. Q. Xin, Y. Y. Yang, Y. F. Luo, K. L. Xia, B. L. Wang, Y. F. Sun, J. P. Wang, Y. Y. Zhang, H. Wu, S. S. Fan, L. Zhang*, K. Liu*. Ultrasensitive, Low-Voltage Operational, and Asymmetric Ionic Sensing Hydrogel for Multipurpose Applications. Adv. Funct. Mater., 30, 1909616 (2020). (Back Cover)
2. B. L. Wang, H. Luo, X. W. Wang, E. Z. Wang, Y. F. Sun, Y.-C. Tsai, H. Zhu, P. Liu, K. L. Jiang, K. Liu*. Bifunctional NbS2-Based Asymmetric Heterostructure for Lateral and Vertical Electronic Devices. ACS Nano, 14, 175 (2020).
3. H. Luo, B. L. Wang, E. Z. Wang, X. W. Wang, Y. F. Sun, Q. Q. Li, S. S. Fan, C. Cheng*, K. Liu*. Phase-transition modulated, high-performance dual-mode photodetectors based on WSe2/VO2 heterojunctions. Appl. Phys. Rev. 6, 041407 (2019).
4. X. Jin#, H. X. Tan#, Z. P. Wu#, J. C. Liang, W. T. Miao, C.-S. Lian, J. T. Wang, K. Liu*, H. M. Wei, C. Feng, P. Liu, Y. Wei, Q. Q. Li, J. P. Wang, L. Liu, X. D. Li*, S. S. Fan, W. H. Duan*, K. L. Jiang*. Continuous, Ultra-Lightweight, and Multi-Purpose Super-Aligned Carbon Nanotube Tapes Viable over a Wide Range of Temperatures. Nano Lett., 19, 6756 (2019). (Supplementary Cover)
5. H. T. Ren#, Z. X. Xiong#, E. Z. Wang#, Z. Q. Yuan, Y. F. Sun, K. L. Zhu, B. L. Wang, X. W. Wang, H. Y. Ding, P. Liu, L. Zhang*, J. Q. Wu, S. S. Fan, X. Y. Li*, K. Liu*. Watching Dynamic Self-Assembly of Web Buckles in Strained MoS2 Thin Films. ACS Nano, 13, 3106 (2019).
6. Y. F. Sun#, J. B. Pan#, Z. T. Zhang#, K. N. Zhang, J. Liang, W. J. Wang, Z. Q. Yuan, Y. K. Hao, B. L. Wang, J. W. Wang, Y. Wu, J. Y. Zheng, L. Y. Jiao, S. Y. Zhou, K. H. Liu, C. Cheng, W. H. Duan, Y. Xu*, Q. M. Yan*, K. Liu*. Elastic Properties and Fracture Behaviors of Biaxially-Deformed, Polymorphic MoTe2. Nano Lett., 19, 761 (2019).
7. K. Liu, S. Lee, S. Yang, O. Delaire, J. Q. Wu*. Recent progresses on physics and appliations of vanadium dioxide. Mater. Today, 21, 875 (2018). (Invited)
8. Y. H. Sun, R. M. Wang, K. Liu*. Substrate Induced Changes in Atomically Thin 2-Dimensional Semiconductors: Fundamentals, Engineering, and Applications. Appl. Phys. Rev., 4, 011301 (2017). (Invited)
9. S. Lee#, K. Hippalgaonkar#, F. Yang#, J. W. Hong#, C. Ko, J. Suh, K. Liu, K. Wang, J. J. Urban, X. Zhang, C. Dames, S. A. Hartnoll, O. Delaire*, J. Q. Wu*. Anomalously Low Electronic Thermal Conductivity in Metallic Vanadium Dioxide. Science, 355, 371 (2017).
10. H. Ma, J. W. Hou, X. W. Wang, J. Zhang, Z. Q. Yuan, L. Xiao, Y. Wei*, S. S. Fan, K. L. Jiang, K. Liu*. Flexible, All-Inorganic Actuators Based on Vanadium Dioxide and Carbon Nanotube Bimorphs. Nano Lett., 17, 421 (2017).