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碳纳米颗粒作为一种新颖的纳米材料,在生物医学、材料以及能源等领域都具有重要应用价值.提出一种基于光诱导交流电渗流的碳纳米颗粒自动化装配新方法.在分析了光诱导非均匀电场环境下碳纳米颗粒纳受力的基础上,建立了光诱导交流电渗流的滑移速度模型以及驱动交流电压频率模型,获得了其最优交流电压驱动频率为1kHz,并利用有限元仿真软件Comsol Multiphysics仿真分析了光诱导交流电渗流在整个装配空间的速度场分布.结合计算机视觉监控和数字投影系统,构建了基于光诱导交流电渗流的碳纳米颗粒自动化装配实验系统,进行了50nm碳颗粒的装配实验.实验结果证明,当交流电压峰值为3V,频率为1kHz时,在光诱导交流电渗流作用下,碳纳米颗粒自动地快速地富集于入射光斑的中心区域.同时,由该方法装配的碳纳米颗粒结构在高度方向上可达到1μm.结果证明,光诱导交流电渗流方法在纳米颗粒的操作与装配,以及三维纳米结构以及纳米传感器构建方面具有重要的应用前景.
As a novel nanomaterial, carbon nanoparticles have important applications in the fields of biomedicine, materials and energy etc. A new automated assembly method of carbon nanoparticles based on light-induced AC flow is proposed.After analyzing the light-induced non-uniform On the basis of the nano-particles under electric field, the slip velocity model of light induced AC flow and the frequency model of AC voltage were established. The optimum driving frequency of AC voltage was obtained as 1 kHz. The finite element simulation software Comsol Multiphysics simulation analyzes the velocity field distribution of light induced AC flow in the whole assembly space.According to computer vision monitoring and digital projection system, an experimental system of carbon nano-particle assembly based on light-induced AC flow is constructed and the assembly experiment of 50nm carbon particles The experimental results show that when the peak value of AC voltage is 3V and the frequency is 1kHz, the carbon nano-particles are rapidly and automatically concentrated in the central area of the incident light spot under the action of light-induced alternating current seepage.At the same time, The particle structure can reach 1μm in the height direction The guided flow seepage flow method has important application prospects in the operation and assembly of nano-particles, as well as in the construction of three-dimensional nano-structures and nano-sensors.