基于飞秒激光直写的三维高定向碳纳米管组装

3D Assembly of Aligned Carbon Nanotubes via Femtosecond Laser Direct Writing

介绍了碳纳米管(CNTs)/聚合物复合材料分散性、定向排布和组装方面的研究进展,并利用双光子聚合(TPP)激光直写技术,实现了多壁碳纳米管(MWNTs)在三维空间的定向排布和分子组装。通过加入硫醇分子,提升了MWNTs/聚合物复合材料中CNTs的分散性和掺杂浓度,增强了CNTs/聚合物复合材料在电学、光学、力学方面的性能,并成功实现了三维CNTs功能器件的制造。研究结果表明,通过将TPP激光直写技术与热退火工艺相结合,可以实现对CNTs簇排列方向和位置的精确控制。

The research status of dispersion, alignment and assembly of carbon nanotubes （CNTs）/polymer composite material is reviewed. In addition, the assembly and alignment in the arbitrary 3D space of multbwall CNTs （MWNTs） are realized via the laser direct writing technique based on two-photon polymerization （TPP）. The addition of thiol molecules makes the dispersion and doping concentration of CNTs in MWCNTs/polymer composites improved, and the optical and mechanical performances enhanced, and the fabrication of 3D CNTs functional devices realized. The research results indicate that, under the combination of TPP laser direct writing technique and thermal annealing process, the precise control of the orientation and placement of CNTs clusters can be achieved.