Publication Date
2009
Journal or Book Title
Journal of Materials Chemistry
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.
DOI
https://doi.org/10.1039/B815055A
Pages
70-74
Volume
19
Issue
1
Recommended Citation
Chen, Hung-Ting; Crosby, Todd A.; Park, Myoung-Hwan; Nagarajan, Sivakumar; Rotello, Vincent M.; and Watkins, James J., "Accessibility of cylindrical channels within patterned mesoporous silica films using nanoparticle diffusion" (2009). Journal of Materials Chemistry. 147.
https://doi.org/10.1039/B815055A