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

Benjamin K. Wilson | Zendy; Mike Hegg | Zendy; Xiaoyu Miao | Zendy; Guozhong Cao | Zendy; Lih Y. Lin | Zendy

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

Author(s) -

Benjamin K. Wilson,

Mike Hegg,

Xiaoyu Miao,

Guozhong Cao,

Lih Y. Lin

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.017276

Subject(s) - materials science , carbon nanotube , particle (ecology) , nano , electrode , nanowire , nanotechnology , nanoparticle , absorption (acoustics) , optoelectronics , laser , optics , composite material , oceanography , chemistry , physics , geology

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. VO(2) 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.

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