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Issue 1, 2009
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Accessibility of cylindrical channels within patterned mesoporous silica films using nanoparticle diffusion

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Abstract

Mesoporous silica films with well ordered nanochannels (approximately 7 nm in diameter) oriented parallel to the substrate were synthesized using supercritical carbon dioxide mediated silica deposition within templates comprised of triblock copolymers blended with strongly associating homopolymers. The films were patterned at the device level by conventional lithography and etched to yield periodic circular features approximately 20 µm in diameter. The nanoscale channels remained accessible to penetrant diffusion as shown by dye uptake experiments. The nanochannel arrays were used as miniature size exclusion columns to mediate nanoparticle diffusion.

Graphical abstract: Accessibility of cylindrical channels within patterned mesoporous silica films using nanoparticle diffusion

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Publication details

The article was received on 28 Aug 2008, accepted on 02 Oct 2008 and first published on 12 Nov 2008


Article type: Paper
DOI: 10.1039/B815055A
Citation: J. Mater. Chem., 2009,19, 70-74
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    Accessibility of cylindrical channels within patterned mesoporous silica films using nanoparticle diffusion

    H. Chen, T. A. Crosby, M. Park, S. Nagarajan, V. M. Rotello and J. J. Watkins, J. Mater. Chem., 2009, 19, 70
    DOI: 10.1039/B815055A

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