State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.
Lab Chip. 2011 Jul 7;11(13):2241-6. doi: 10.1039/c1lc20272c. Epub 2011 May 9.
We demonstrate a photophoretic assembly and migration of dielectric (SiO(2) and TiO(2)) particles and bacteria (Escherichia coli) in liquids by using a subwavelength diameter fiber. With a lightwave at 1.55 μm launched into the fiber, the objects are radiated by the leaking light of the fiber to yield negative photophoretic forces which drive the objects to move toward the fiber, with an average assembling/migrating speed of 5-15 individuals per second (ind/s). The influences of laser-on duration, optical power, and size of particles on the photophoretic velocities are also investigated.
我们展示了一种亚波长直径光纤的光致泳动组装和迁移介电（SiO2 和 TiO2）颗粒和细菌（大肠杆菌）的方法。利用 1.55 μm 的光波进入光纤，物体被光纤的漏光辐射产生负光致泳力，从而驱动物体向光纤移动，平均组装/迁移速度为每秒 5-15 个个体（ind/s）。还研究了激光开启时间、功率和颗粒大小对光致泳动速度的影响。
