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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 22 — Oct. 27, 2008
  • pp: 17276–17281

Scalable nano-particle assembly by efficient light-induced concentration and fusion

Benjamin K. Wilson, Mike Hegg, Xiaoyu Miao, Guozhong Cao, and Lih Y. Lin  »View Author Affiliations

Optics Express, Vol. 16, Issue 22, pp. 17276-17281 (2008)

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Avalanche concentration, a rapid, long-range accumulation of particles around a laser spot in a liquid sample, is demonstrated and characterized for various nanoparticles (NPs). The effect is driven by a convective flow in the sample, caused by efficient heating of NPs with high absorption efficiencies. Several types of concentration behavior were observed and characterized. Control of optical power and initial particle density was found to be effective in determining the assembly process. VO2 nanowires, carbon nanotube (CNT), and quantum dot (QD) electrode gap bridges were assembled with a variety of sizes and geometries to show the utility of the method for nano-assembly. Bridges were assembled from as many as thousands to as few as one NP and were found to form solid electrical contact between the electrodes, as verified by measuring the current - voltage (I-V) characteristic.

© 2008 Optical Society of America

OCIS Codes
(350.4855) Other areas of optics : Optical tweezers or optical manipulation

ToC Category:
Optical Trapping and Manipulation

Original Manuscript: August 18, 2008
Revised Manuscript: October 1, 2008
Manuscript Accepted: October 4, 2008
Published: October 13, 2008

Benjamin K. Wilson, Mike Hegg, Xiaoyu Miao, Guozhong Cao, and Lih Y. Lin, "Scalable nano-particle assembly by efficient light-induced concentration and fusion," Opt. Express 16, 17276-17281 (2008)

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