Optical trapping and alignment of single gold nanorods using plasmon resonances

We demonstrate three-dimensional optical trapping and orientation of individual Au nanorods in solution, taking advantage of the longitudinal surface-plasmon resonance to enhance optical forces. Stable trapping is achieved using laser light that is detuned slightly to the long-wavelength side of the resonance; by contrast, light detuned to the short-wavelength side repels rods from the laser focus. Under stable-trapping conditions, the trapping time depends exponentially on laser power, in agreement with a Kramers escape process. Trapped rods have their long axes aligned with the trapping-laser polarization, as evidenced by a suppression of rotational diffusion about the short axis. The ability to trap and orient individual metal nanoparticles may find important application in assembly of functional structures, sorting of nanoparticles according to their shape, and development of novel microscopy techniques.

[1]  D. Grier,et al.  Sorting mesoscopic objects with periodic potential landscapes: optical fractionation. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[2]  Hongxing Xu,et al.  Surface-plasmon-enhanced optical forces in silver nanoaggregates. , 2002, Physical review letters.

[3]  Shida Tan,et al.  Optical Trapping of Single-Walled Carbon Nanotubes , 2004 .

[4]  Romain Quidant,et al.  Tunable optical sorting and manipulation of nanoparticles via plasmon excitation. , 2006, Optics letters.

[5]  L. Oddershede,et al.  Expanding the optical trapping range of gold nanoparticles. , 2005, Nano letters.

[6]  Ultrafast resonant optical scattering from single gold nanorods: Large nonlinearities and plasmon saturation , 2006 .

[7]  Takuya Iida,et al.  Theoretical study of the optical manipulation of semiconductor nanoparticles under an excitonic resonance condition. , 2003, Physical review letters.

[8]  Richard N. Zare,et al.  Biased Diffusion, Optical Trapping, and Manipulation of Single Molecules in Solution , 1996 .

[9]  R. A. Kennedy,et al.  Forward-backward non-linear filtering technique for extracting small biological signals from noise , 1991, Journal of Neuroscience Methods.

[10]  Chu,et al.  Experimental observation of optically trapped atoms. , 1986, Physical review letters.

[11]  D. Grier.  A revolution in optical manipulation , 2003, Nature.

[12]  Philippe Guyot-Sionnest,et al.  Optical trapping and alignment of single gold nanorods by using plasmon resonances. , 2006 .

[13]  Yael Roichman,et al.  Manipulation and assembly of nanowires with holographic optical traps. , 2005, Optics express.

[14]  H. Tiziani,et al.  Multi-functional optical tweezers using computer-generated holograms , 2000 .

[15]  Mostafa A. El-Sayed,et al.  Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method , 2003 .

[16]  Philip S Low,et al.  In vitro and in vivo two-photon luminescence imaging of single gold nanorods. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[17]  John T Fourkas,et al.  Highly efficient multiphoton-absorption-induced luminescence from gold nanoparticles. , 2005, Nano letters.

[18]  Matthew Pelton.  Comment on "Theoretical study of the optical manipulation of semiconductor nanoparticles under an excitonic resonance condition". , 2004, Physical review letters.

[19]  David Grier,et al.  Processing carbon nanotubes with holographic optical tweezers. , 2004, Optics express.

[20]  Elliot L. Elson,et al.  Fluorescence correlation spectroscopy : theory and applications , 2001 .

[21]  W. Steen.  Absorption and Scattering of Light by Small Particles , 1999 .

[22]  Anpei Ye,et al.  Dynamic holographic optical tweezers using a twisted-nematic liquid crystal display , 2006 .

[23]  M. Nieto-Vesperinas,et al.  Optical forces on small particles: attractive and repulsive nature and plasmon-resonance conditions. , 2003, Journal of the Optical Society of America. A, Optics, image science, and vision.

[24]  Johannes Hohlbein,et al.  Recurrence and photon statistics in fluorescence fluctuation spectroscopy. , 2004, Physical review letters.

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

[26]  John E. Wessel,et al.  Surface-enhanced optical microscopy , 1985 .

[27]  Biman Bagchi,et al.  Needlelike motion of prolate ellipsoids in the sea of spheres , 2001 .

[28]  Mattias Goksör,et al.  Optical Spectroscopy of Single Trapped Metal Nanoparticles in Solution , 2004 .