Issue 1, 2009

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

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

Article information

Article type
Paper
Submitted
28 Aug 2008
Accepted
02 Oct 2008
First published
12 Nov 2008

J. Mater. Chem., 2009,19, 70-74

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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