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).
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://dx.doi.org/10.1088/0957-4484/19/47/475604
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.
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
Material Science > Soft materials
|Deposited By:||Farnush Anwar|
|Deposited On:||16 Dec 2008 16:09|
|Last Modified:||16 Dec 2008 16:10|
Repository Staff Only: item control page