Yao, L. and Woll, A. R. and Watkins, J. J.. (2013) Directed Assembly of Block Copolymer Templates for the Fabrication of Mesoporous Silica Films with Controlled Architectures via 3-D Replication. Macromolecules, 46 (15). pp. 6132-6144.
Full text not available from this repository.Abstract
Mesoporous silica films with cylindrical or spherical pores up to 40 nm in diameter were fabricated by replicating the morphologies of polystyrene-b-poly(tert-butyl acrylate), PS-b-PtBA, copolymers using CO2-assisted infusion and phase selective condensation of tetraethylorthosilicate within the polymer template. The template structures, including domain packing, orientation and spacing were controlled by adjusting the molecular weight, volume fraction and polydispersities of the block copolymers and by solvent annealing. Cylinder alignment was achieved in polymer templates through directed self-assembly (DSA). The structural details imparted to the template prior to precursor infusion were retained in the mesoporous films. In one example, aligned PS-b-PtBA templates were replicated to yield massively parallel arrays of cylindrical pores with pore diameters up to similar to 20 nm. The ability to tune pore sizes in this range within aligned nanochannels is attractive for applications involving biomolecules.
| Item Type: | Article |
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| Additional Information: | ISI Document Delivery No.: 202DITimes Cited: 0Cited Reference Count: 110Yao, Li Woll, Arthur R. Watkins, James J.NSF Center for Hierarchical Manufacturing CMMI-1025020; National Institutes of Health/National Institute of General Medical Sciences DMR-0936384This work was supported by the NSF Center for Hierarchical Manufacturing (CMMI-1025020). Facilities were supported by the Cornell High Energy Synchrotron Source (CHESS) G1 station, a national user facility supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under Award No. DMR-0936384. Facilities supported by the Materials Research Science and Engineering Center at University of Massachusetts-Amherst were used in this work. We thank Dr. Dhanasekaran Thirunavukkarasu and Mr. Louis Raboin for assistance with characterization and Dr. John Ell, Dr. Nick Hendricks, and Todd Crosby for helpful discussions.Amer chemical socWashington |
| Uncontrolled Keywords: | order |
| Collections: | Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing |
| Depositing User: | Robert Stevens |
| Date Deposited: | 27 Mar 2014 |
| Last Modified: | 27 Mar 2014 20:21 |
| URI: | http://eprints.internano.org/id/eprint/2185 |
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