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新闻动态
2025-5-6
扭转范德华界面热输运机制研究
2025-3-15
同手性碳纳米管范德华晶体
该研究开发了一种全新的滑移自组装生长技术，在原子级平整的六方氮化硼基底上直接生长出密排的碳纳米管阵列，成功构建了碳纳米管范德华晶体这一完美结构
2024-3-27
超长石墨烯纳米条带在六方氮化硼层间生长机制
该研究成功实现了超长、超窄、单手性石墨烯纳米带在六方氮化硼晶体层间的嵌入式生长并揭示了其微观机制，同时演示了所生长的石墨烯纳米条带可用于构建高性能场效应晶体管器件。
2023-10-15
扭转MoS2界面的各向异性热导率
该研究基于最新开发的力场，使用非平衡分子动力学模拟了扭转MoS₂体系的热输运性质，发现层间热导率随着扭转角的增大而逐渐减小并趋于收敛，通过分析声子的振动模式发现层间扭转主要削弱了低频区域（0~15 THz）声子的界面传热能力，从而导致跨界面热输运受阻，然而面内热导率却几乎不受层间扭转的影响，因此计算结果显示出热导率各向异性比高度依赖于层间扭转且最大比值约为400，和实验测量结果基本吻合。我们的工作有望为实验调控过渡金属硫族化合物的热导率提供指导。
2022-6-18
摩擦老化的微观机制
这项研究建立了描述界面化学键影响摩擦老化的统一理论框架，基于此得到的解析模型与实验结果吻合良好。该理论的优势是可以在相同的时间和空间尺度上与实验进行比较，弥补了蒙特卡罗模拟的关键不足，为进一步研究界面力-化学耦合影响摩擦行为的机制奠定了基础。
2021-6-4
交替石墨烯/六方氮化硼异质结构的奇异力学行为
该研究预测了一种由交替堆叠的石墨烯和六方氮化硼组成的新型范德华异质结构，其力学性能高度依赖于交替堆叠层数的奇偶性，原因是界面形成的摩尔超晶格随着层数奇偶性而呈现不同的形貌和变形。这一发现为设计和有效调节具有优异力学性能的新型超材料提供了一种新方法。
研究方向
研究方向1
结构超滑算法开发与体系设计
研究方向2
范德华界面非平衡动力学
研究方向3
原位摩擦磨损精细测量
研究成果
The Origin of Moiré-Level Stick-Slip Behavior on Graphene/h-BN Heterostructures
Ke Huang, Huasong Qin, Shuai Zhang, Qunyang Li, Wengen Ouyang, Yilun Liu First published: 22 June 2022 https://doi.org/10.1002/adfm.202204209Citations: 8
Microscopic mechanisms of frictional aging
Wengen Ouyang*, Michael Urbakh*, “Microscopic mechanisms of frictional aging”, J Mech Phys Solids., 2022, 166: 104944.
Pseudo-break imaging of carbon nanotubes for determining elastic bending energies
Changfei Jing, Yongji Qin, Wengen Ouyang*, Jun Luo*, “Pseudo-break imaging of carbon nanotubes for determining elastic bending energies”, Nano Research, 2022, 32(35): 2204209.
Finite temperature mechanics of multilayer 2D materials
Yan Chen, Wengen Ouyang, Ke Zhou, Huasong Qin, Yilun Liu, “Finite temperature mechanics of multilayer 2D materials”, Extreme Mech. Lett., 2022, 52: 101612.
Catalytic Growth of Ultralong Graphene Nanoribbons on Insulating Substrates
Bosai Lyu, Jiajun Chen, Shuo Lou, Can Li, Lu Qiu, Wengen Ouyang, Jingxu Xie, Izaac Mitchell, Tongyao Wu, Aolin Deng, Cheng Hu, Xianliang Zhou, Peiyue Shen, Saiqun Ma, Zhenghan Wu, Kenji Watanabe, Takashi Taniguchi, Xiaoqun Wang, Qi Liang, Jinfeng Jia, Michael Urbakh, Oded Hod*, Feng Ding*, Shiyong Wang*, Zhiwen Shi*, “Catalytic Growth of Ultralong Graphene Nanoribbons on Insulating Substrates”, Adv. Mater., 2022: 2200596.
Anisotropic interlayer force field for transition metal dichalcogenides the case of molybdenum disulfide
Wengen Ouyang, Reut Sofer, Xiang Gao, Jan Hermann, Alexandre Tkatchenko, Leeor Kronik, Michael Urbakh*, Oded Hod, “Anisotropic Interlayer Force Field for Transition Metal Dichalcogenides: The Case of Molybdenum Disulfide”, J Chem. Theory Comput., 2021, 17 (11): 7237-7245.
Superlubric polycrystalline graphene interfaces
Xiang Gao, Wengen Ouyang, Michael Urbakh*, Oded Hod, “Superlubric polycrystalline graphene interfaces”, Nat. Commun., 2021, 12(1): 1-9.
Registry-dependent peeling of layered material interfaces: The case of graphene nanoribbons on hexagonal boron nitride
Wengen Ouyang *, Oded Hod *, Michael Urbakh, ACS Appl. Mater. Interfaces ., 2021, 13(36): 43533-43539...............
Mechanisms of frictional energy dissipation at graphene grain boundaries
Xiang Gao, Wengen Ouyang, Oded Hod*, Michael Urbakh, “Mechanisms of frictional energy dissipation at graphene grain boundaries”, Phys. Rev. B., 2021, 103: 045418.
Computational Prediction of Superlubric Layered Heterojunctions
Enlai Gao, Bozhao Wu, Yelingyi Wang, Xiangzheng Jia, Wengen Ouyang, Ze Liu*, “Computational Prediction of Superlubric Layered Heterojunctions”, ACS Appl. Mater. Interfaces., 2021, 13(28): 33600–33608.
Registry-Dependent Potential for Interfaces of Gold with Graphitic Systems
Wengen Ouyang, Oded Hod *, Roberto Guerra*, “ Registry-Dependent Potential for Interfaces of Gold with Graphitic Systems ”, J Chem. Theory Comput., 2021, 17 (11): 7215-7223.
Load-velocity-temperature relationship in frictional response of microscopic contacts
Wengen Ouyang, Yao Cheng, Ming Ma, Michael Urbakh, “Load-velocity-temperature relationship in frictional response of microscopic contacts”, J. Mech. Phys. Solids, 2020, 137: 103880.
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