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Bio-Design and Manufacturing  2022 Vol.5 No.3 P.529-539

http://doi.org/10.1007/s42242-022-00186-3


Modulating vectored non-covalent interactions for layered assembly with engineerable properties


Author(s):  Jiahao Zhang, Sarah Guerin, Haoran Wu, Bin Xue, Yi Cao, Syed A. M. Tofail, Yancheng Wang, Damien Thompson, Wei Wang, Kai Tao, Deqing Mei & Ehud Gazit

Affiliation(s):  State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   xuebinnju@nju.edu.cn, Damien.Thompson@ul.ie, kai.tao@zju.edu.cn

Key Words:  Vectored non-covalent interactions, Layered assembly, Supramolecular graphene, Engineerable properties, Physical vapor deposition


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Jiahao Zhang, Sarah Guerin, Haoran Wu, Bin Xue, Yi Cao, Syed A. M. Tofail, Yancheng Wang, Damien Thompson, Wei Wang, Kai Tao, Deqing Mei & Ehud Gazit. Modulating vectored non-covalent interactions for layered assembly with engineerable properties[J]. Journal of Zhejiang University Science D, 2022, 5(3): 529-539.

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Abstract: 
vectored non-covalent interactions—mainly hydrogen bonding and aromatic interactions—extensively contribute to (bio)- organic self-assembling processes and significantly impact the physicochemical properties of the associated superstructures. However, vectored non-covalent interaction-driven assembly occurs mainly along one-dimensional (1D) or three-dimensional (3D) directions, and a two-dimensional (2D) orientation, especially that of multilayered, graphene-like assembly, has been reported less. In this present research, by introducing amino, hydroxyl, and phenyl moieties to the triazine skeleton, supramolecular layered assembly is achieved by vectored non-covalent interactions. The planar hydrogen bonding network results in high stability, with a thermal sustainability of up to about 330 °C and a Young’s modulus of up to about 40 GPa. Upon introducing wrinkles by biased hydrogen bonding or aromatic interactions to disturb the planar organization, the stability attenuates. However, the intertwined aromatic interactions prompt a red edge excitation shift effect inside the assemblies, inducing broad-spectrum fluorescence covering nearly the entire visible light region (400–650 nm). We show that bionic, superhydrophobic, pillar-like arrays with contact angles of up to about 170° can be engineered by aromatic interactions using a physical vapor deposition approach, which cannot be realized through hydrogen bonding. Our findings show the feasibility of 2D assembly with engineerable properties by modulating vectored non-covalent interactions.

浙江大学陶凯等 | 矢量非共价键作用力驱动二维自组装及基于其表面功能结构制造

本研究论文聚焦矢量非共价键作用力驱动二维自组装及基于其表面功能结构制造问题。基于非共价键作用力自组装制备一维线状或三维块状超结构已被广泛报道;而相比之下,类石墨烯结构的二维层状超结构以及基于其制造特定功能的表界面结构件,报道相对较少。为此,浙江大学机械工程学院流体动力与机电系统国家重点实验室陶凯研究员,与南京大学王炜教授、爱尔兰利莫瑞克大学Damien Thompson教授以及以色列特拉维夫大学Ehud Gazit教授课题组组成一支国际合作团队,利用具有矢量特性的非共价键作用力(氢键、芳香作用),实现了二维叠层自组装体的构建,揭示了矢量非共价键作用力网络对自组装体物化性能的影响规律,并进一步制备出仿荷叶结构的功能性表面。具体而言,研究团队利用氢键和芳香作用,自组装制备出类石墨烯结构的二维层状超结构;并利用其不同的矢量特性,实现了对二维叠层组装的精细调控。进一步得益于芳香作用非水平组装的特点,研究团队利用物理气象沉积技术实现了超疏水阵列薄膜超结构的自组装制造。该工作为设计构建各种二维自组装超结构,并以此制造基于(生物)有机小分子的功能性表面提供了一种新思路。

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