Nano Archive

Large-scale assembly of colloidal nanoparticles and fabrication of periodic subwavelength structures

Min, Wei-Lun and Jiang, Peng and Jiang, Bin (2008) Large-scale assembly of colloidal nanoparticles and fabrication of periodic subwavelength structures. NANOTECHNOLOGY, 19 (47).

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Official URL: http://dx.doi.org/10.1088/0957-4484/19/47/475604

Abstract

This paper reports a simple and scalable spin-coating technique for assembling 70 nm silica nanoparticles into non-close-packed colloidal crystals over a large area. The thickness of the shear-aligned colloidal crystals can be controlled from hundreds of layers to a single monolayer by adjusting the spin-coating conditions. We further demonstrate that the spin-coated colloidal monolayers can be used as structural templates to pattern sub-100 nm pillar arrays directly on silicon substrates. The resulting subwavelength-structured pillar arrays exhibit excellent broadband antireflective and superhydrophobic properties, which are promising for developing self-cleaning antireflection coatings for crystalline silicon solar cells. This bottom-up approach enables large-scale production of periodic nanostructures with resolution beyond the optical diffraction limit that have important technological applications ranging from high-density data storage and optoelectronics to biological sensing and subwavelength optics.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
Material Science > Soft materials
ID Code:1904
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 16:09
Last Modified:16 Dec 2008 16:10

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