Toberer, Eric S. and Grossman, Madeleine and Schladt, Thomas and Lange, Frederick F. and Seshadri, Ram (2007) Epitaxial Manganese Oxide Thin Films with Connected Porosity: Topotactic Induction of Crystallographic Pore Alignment. Chemistry of Materials, 19 (20). pp. 4833-4838. ISSN 0897-4756. doi:10.1021/cm0714133. https://resolver.caltech.edu/CaltechAUTHORS:20170203-100737307
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Abstract
Epitaxial thin films of ZnMn_2O_4, grown from an aqueous solution on (100) and (111) spinel MgAl_2O_4 substrates, have been topotactically reduced and leached to produce epitaxial rock salt MnO on the same substrates. The volume change accompanying the conversion of ZnMn_2O_4 to 2MnO associated with a loss of Zn and O_2 manifests as a network of interconnected, 50−100 nm pores. The topotactic nature of the transformation ensures that the pores are crystallographically aligned with the substrate: on the (100) MgAl_2O_4 substrate, pores with rectangular cross-sections are aligned parallel to the surface normal. On the (111) MgAl_2O_4 substrate, the pores are aligned at constant, fixed angles with respect to the substrate normal.
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Additional Information: | © 2007 American Chemical Society. Received 24 May 2007. Published online 28 August 2007. Published in print 1 October 2007. We thank Adele Tamboli for helpful suggestions. E.S.T. is supported by an NSF IGERT Fellowship (DGE 9987618) and M.G. is supported by a RISE undergraduate fellowship. We gratefully acknowledge support from the donors of the American Chemical Society Petroleum Research Fund and the National Science Foundation for a Chemical Bonding Center (CHE 0434567) and for use of MRSEC facilities (DMR 0520415). | ||||||||||||
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Issue or Number: | 20 | ||||||||||||
DOI: | 10.1021/cm0714133 | ||||||||||||
Record Number: | CaltechAUTHORS:20170203-100737307 | ||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170203-100737307 | ||||||||||||
Official Citation: | Epitaxial Manganese Oxide Thin Films with Connected Porosity: Topotactic Induction of Crystallographic Pore Alignment Eric S. Toberer, Madeleine Grossman, Thomas Schladt, Frederick F. Lange, and Ram Seshadri Chemistry of Materials 2007 19 (20), 4833-4838 DOI: 10.1021/cm0714133 | ||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||
ID Code: | 74016 | ||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||
Deposited By: | Ruth Sustaita | ||||||||||||
Deposited On: | 03 Feb 2017 20:18 | ||||||||||||
Last Modified: | 11 Nov 2021 05:24 |
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