基于微纳光纤的光热捕获研究及应用
Studies and Applications of Photothermal Trapping Based on Micro/nanofiber

光热捕获利用微纳光纤上的温度梯度场，实现了对周围液体中的大量微纳米颗粒捕获、收集、迁移和分离等操作. 通过在微纳光纤表面涂覆一层氧化石墨烯（GO）胶体薄膜，制备出具有良好光热转换性能的微加热器. 通入小功率的近红外光，GO薄膜产生一个温度梯度场. 结果表明，该温度梯度场对微粒具有良好的捕获作用，可长时间、大范围地捕获分布于周围液体中的聚苯乙烯小球、银纳米线等不同形状、密度的微粒. 该光热捕获装置具有操作简单、易于制备、耗能功率小的特点，在微粒捕获、微纳米器件加工等领域有良好的应用前景.
： Photothermal trapping can capture, collect, migrate, and separate micro/nanoparticles based on the temperature gradient field of micro/nanofiber. A micro-heater with good photothermal conversion properties is prepared by coating a layer of graphene oxide (GO) colloidal film on the surface of micro/nanofiber. After the fiber is launched into near infrared light with low power, GO produces a 〖JP2〗temperature gradient field. The results show that the temperature gradient field has a good effect on the trapping of particles in the surrounding liquid, which can capture polystyrene beads, silver nanowires, and other particles with different shapes and density 〖JP2〗on a large scale for long time. The photothermal trapping device has advantages of simple operation, easy preparation, and low power consumption, which has prospect applications in the fields of particle capture, processing of the micro/nano devices, etc.〖JP