Influence of gold nanoparticles' size on the trapping performance of optical tweezers

Gold nanoparticles are considered to be better probes than the traditional polystyrene nanobeads in nanomaterials and nanobiotechnology. Meanwhile, optical tweezers are very popular tool for manipulation and force measurement in these fields. Gold nanoparticles with different size will receive radiation forces with different scale in optical tweezers. This paper theoretically studies the trapping performance of the optical tweezers for the gold nanoparticle with different size, and finally gives the relation curves between the radiation forces and the radius of the of the particle.

[1]  A. Mehta,et al.  Single-molecule biomechanics with optical methods. , 1999, Science.

[2]  Feng Wang,et al.  Optical trapping gold nanoparticles by a pulse laser , 2010, SPIE/COS Photonics Asia.

[3]  Steven M. Block,et al.  Optical trapping of metallic Rayleigh particles. , 1994, Optics letters.

[4]  C P Grover,et al.  Automated single-cell sorting system based on optical trapping. , 2001, Journal of biomedical optics.

[5]  S. Chu,et al.  Observation of a single-beam gradient force optical trap for dielectric particles. , 1986, Optics letters.

[6]  S. Smith,et al.  Ionic effects on the elasticity of single DNA molecules. , 1997, Proceedings of the National Academy of Sciences of the United States of America.

[7]  E. Wolf,et al.  Electromagnetic diffraction in optical systems, II. Structure of the image field in an aplanatic system , 1959, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[8]  M. Ozkan,et al.  Electro-optical platform for the manipulation of live cells , 2003 .

[9]  Feng Wang,et al.  Radiation forces analysis for gold nanoparticles in optical tweezers , 2010, International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT).