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

作　　者：邢晓波[1,2] 陈伊琳[1,2] 刘绍静[1,2] 杨剑鑫 史可樟 程煜鹏 朱德斌[1,4] 

机构地区：[1]华南师范大学生物光子学研究院,激光生命科学教育部重点实验室,广州510631 [2]华南师范大学物理与电信工程学院,广州510006 [3]华南师范大学华南先进光电子研究院,光及电磁波研究中心,广州510006 [4]华南师范大学化学与环境学院,广州市生物医药分析化学重点实验室,广州510006

出　　处：《华南师范大学学报（自然科学版）》2016年第5期15-18,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(61177077,81371877);广东省自然科学基金项目(2013B090500123,2014A030313432,2016A020221030,2013B090500034);广东省创新团队项目(201001D0104799318)

摘　　要：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 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 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.

关 键 词：微纳光纤 温度梯度场 光热捕获 银纳米线 聚苯乙烯小球 

分 类 号：O43[机械工程—光学工程]