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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9616–9623

Assembling of three-dimensional crystals by optical depletion force induced by a single focused laser beam

Hai-Dong Deng, Guang-Can Li, Hai-Ying Liu, Qiao-Feng Dai, Li-Jun Wu, Sheng Lan, Achanta Venu Gopal, Vyacheslav A. Trofimov, and Tatiana M. Lysak  »View Author Affiliations

Optics Express, Vol. 20, Issue 9, pp. 9616-9623 (2012)

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We proposed a method to assemble microspheres into a three-dimensional crystal by utilizing the giant nonequilibrium depletion force produced by nanoparticles. Such assembling was demonstrated in a colloid formed by suitably mixing silica microspheres and magnetic nanoparticles. The giant nonequilibrium depletion force was generated by quickly driving magnetic nanoparticles out of the focusing region of a laser light through both optical force and thermophoresis. The thermophoretic binding of silica beads is so tight that a colloidal photonic crystal can be achieved after complete evaporation of solvent. This technique could be employed for fabrication of colloidal photonic crystals and molecular sieves.

© 2012 OSA

OCIS Codes
(350.5340) Other areas of optics : Photothermal effects
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: February 6, 2012
Revised Manuscript: March 31, 2012
Manuscript Accepted: April 4, 2012
Published: April 12, 2012

Virtual Issues
Vol. 7, Iss. 6 Virtual Journal for Biomedical Optics

Hai-Dong Deng, Guang-Can Li, Hai-Ying Liu, Qiao-Feng Dai, Li-Jun Wu, Sheng Lan, Achanta Venu Gopal, Vyacheslav A. Trofimov, and Tatiana M. Lysak, "Assembling of three-dimensional crystals by optical depletion force induced by a single focused laser beam," Opt. Express 20, 9616-9623 (2012)

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