Size-, Position-, and Separation-Controlled One-Dimensional Alignment of Nanoparticles Using an Optical Near Field

Takashi YATSUI  Wataru NOMURA  Motoichi OHTSU  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.9   pp.1798-1802
Publication Date: 2005/09/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.9.1798
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Nanophotonics and Related Techniques)
optical near-field,  self-assembly,  nanoparticles,  

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Particles several tens of nanometers in size were aligned in the desired positions in a controlled manner by using capillary force interaction and suspension flow. Latex beads 40-nm in diameter were aligned linearly around a 10-µm-hole template fabricated by lithography. Further control of their position and separation was realized using colloidal gold nanoparticles by controlling the particle-substrate and particle-particle interactions using an optical near field generated on the edge of a Si wedge, in which the separation of the colloidal gold nanoparticles was controlled by the direction of polarization.