刺激响应性二维Janus超薄膜材料构筑与传感性能研究

Janus materials open a new research direction for the preparation, functionization and the structure-property studies of nano-materials. However, the studies of two dimensional (2D) Janus superthin film material in micro and nano scale is highly lagging. It is urgent need to explore new method to fabricate 2D superthin film with strictly distinguish of corresponding chemical composition and morphology, as well as finely control of the micro- and nanostructure. After the preparation of carbon nanotubes (CNTs) superthin films via the self-assembly on water/air interface, this project propose to transfer the films from the surface of water to the surface of liquid monomer. Through self-initiated photografting and photopolymerization (SIPGP) from photo active sites on the surface of CNTs, polymer brushes was then grafted unidirectionally from to finally achieve the stimulus responsive 2D superthin film. We propose to reveal the self-assembly mechanism of CNTs on the water/air interface and finely controlled law of 2D Janus superthin film, and to explore the collaborative application of stimulus responsive polymer and functional CNTs, and to construct conductivity type and transistor type device for the application in chemical sensing fields. It is significantly scientific important of our project which will contribute to explore new strategies for preparing 2D Janus thin film with strict recognition of chemical composition, and to collaborative use the functionzation of each part of Janus materials.

Janus材料的出现为纳米材料的制备、功能化及其构效性研究开辟了新方向，但具有微纳米尺度的二维Janus超薄膜材料的研究十分滞后，急需相应的化学组成与形貌严格区分的新方法。本项目拟通过把水/空气界面经自组装获得的碳纳米管(CNTs)超薄膜转移至液相单体的表面，利用CNTs表面上的光活性单元，通过自引发的光接枝光聚合（SIPGP），在CNTs薄膜接触液面的一侧单向接枝高分子刷，获得刺激响应性的二维Janus超薄膜材料；揭示CNTs在水/空气界面的自组装机理及二维Janus薄膜的精细调控规律，探索Janus薄膜中高分子刷刺激响应性和CNTs功能性的协同效应，通过组建电导型和晶体管型器件实现其在化学传感领域的应用。该项研究将丰富化学组成严格区分的二维Janus薄膜材料制备的新思路，并进一步开拓协同利用Janus材料各组分功能的新渠道。

Janus材料的出现为纳米材料的制备、功能化及其构效性研究开辟了新方向，但具有微纳米尺度的二维Janus薄膜材料的研究十分滞后，急需相应的化学组成与形貌严格区分的新方法。本项目通过把水/空气界面经自组装获得的碳纳米管(CNTs)薄膜转移至含有反应性单体液相的表面，通过表面引发聚合进行刺激响应性高分子刷在液相一侧的表面修饰、改性，获得非对称的碳纳米管/高分子刷薄膜；揭示CNTs在水/空气界面的自组装机理及二维Janus复合薄膜的精细调控规律，通过组建电导型和晶体管型器件实现复合薄膜在传感领域的应用。我们的研究丰富了化学组成严格区分的二维Janus薄膜材料制备与多功能应用的新思路。