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. 2014 Jan 15;10(1):66-72.
doi: 10.1002/smll.201300713. Epub 2013 Jul 29.

Substrate control of anisotropic resistivity in heteroepitaxial nanostructured arrays of cryptomelane manganese oxide on strontium titanate

Anais E Espinal  1 , Yonggao Yan, Lichun Zhang, Laura Espinal, Aimee Morey, Barrett O Wells, Mark Aindow, Steven L Suib
Affiliations

Substrate control of anisotropic resistivity in heteroepitaxial nanostructured arrays of cryptomelane manganese oxide on strontium titanate

Anais E Espinal et al. Small. .

Abstract

Resistivity and resistance measurements have been carried out for thin films of cryptomelane-type manganese oxide (OMS-2) grown onto (001), (110), and (111)STO single crystals substrates via pulsed laser deposition. While the symmetries of the (001) and (111)STO substrate surfaces give deposits consisting of multiple nanofiber arrays with isotropic in-plane resistivities, only a single nanofiber array is formed on (110)STO giving highly anisotropic electrical properties with very low resistivity values measured parallel to the fibers and similar to the lowest value ever reported.

Keywords: cryptomelane; heteroepitaxial growth; resistance; resistivity.

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