Optical trapping and controllable targeted delivery of nanoparticles by a nanofiber ring

Ying Li, Yanjun Hu

The stable manipulation and position-designated delivery of nanoparticles has shown potential application in targeted drug delivery and enhanced detection of viruses. In this paper, we demonstrate optical trapping and controllable targeted delivery of 700 nm diameter particles using a nanofiber ring. Based on 3D FDTD simulations, the bending loss for bent nanofibers was calculated at different fiber diameters, bending radio, and laser wavelengths. Therefore, according to the theoretical analysis, the 500 nm diameter nanofiber and 808 nm wavelength laser light were chosen. The experimental results indicate that, by directing a laser beam with a wavelength of 808 nm into a nanofiber ring, nanoparticles were trapped and transported along the ring, and released into the water at a designated position because of bending loss. The release position of particles was controllable by the input optical power.

DOI