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Epitaxial and Nanoscale Fe-doped TiO2 and Ti-doped alpha-Fe2O3 - Magnetic, Electronic and Photochemical Properties Modification via Selective Doping


EMSL Project ID
35197

Abstract

The wide-ranging properties of transition metal oxides can in principle be expanded even further through selective doping. We propose to investigate the effect of doping TiO2 and alpha-Fe2O3 with cations of the other oxide on the electronic structure, photoactivity, and magnetic properties of the host. Our synthetic methods will include molecular beam epitaxy to generate highly-ordered crystalline films, atmospheric pressure chemical vapor deposition to generate high-surface-area mesostructured photoelectrodes, and wet chemical synthesis to yield crystalline nanoparticles that can be kept in colloidal suspension. By engineering the electronic and magnetic structure, we aim to modify the photochemical, static magnetic, and magnetotransport properties in ways that would be fundamentally illuminating as well as potentially useful for clean energy generation, organics destruction and oxide spintronics.

Project Details

Project type
Large-Scale EMSL Research
Start Date
2009-10-01
End Date
2012-09-30
Status
Closed

Team

Principal Investigator

Scott Chambers
Institution
Pacific Northwest National Laboratory

Team Members

Yong Wang
Institution
Pacific Northwest National Laboratory

Tamas Varga
Institution
Environmental Molecular Sciences Laboratory

David Keavney
Institution
Argonne National Laboratory

Andrew Mangham
Institution
Pacific Northwest National Laboratory

Bo Zhao
Institution
University of Washington

Steve Heald
Institution
Argonne National Laboratory

Claire Johnson
Institution
University of Washington

Michael Henderson
Institution
Pacific Northwest National Laboratory

Yingge Du
Institution
Pacific Northwest National Laboratory

Tiffany Kaspar
Institution
Pacific Northwest National Laboratory

Daniel Gamelin
Institution
University of Washington

Related Publications

Chambers SA. 2010. "Epitaxial Growth and Properties of Doped Transition Metal and Complex Oxide Films." Advanced Materials 22(2):219-248. doi:10.1002/adma.200901867
Kaspar TC, A Ney, AN Mangham, SM Heald, Y Joly, V Ney, F Wilhelm, A Rogalev, F Yakou, and SA Chambers. 2012. "Structure of epitaxial (Fe,N) codoped rutile TiO2 thin films by x-ray absorption." Physical Review. B, Condensed Matter and Materials Physics 86(3):035322. doi:10.1103/PhysRevB.86.035322
Kaspar TC, T Droubay, and SA Chambers. 2010. "Atomic oxygen flux determined by mixed-phase Ag/Ag2O deposition." Thin Solid Films 519(2):635-640. doi:10.1016/j.tsf.2010.08.081
Kaspar TC, T Droubay, SA Chambers, and P Bagus. 2010. "Spectroscopic evidence for Ag(III) in highly oxidized silver films by x-ray photoelectron spectroscopy." Journal of Physical Chemistry C 114(49):21562–21571. doi:10.1021/jp107914e
Mangham AN, N Govind, ME Bowden, V Shutthanandan, AG Joly, MA Henderson, and SA Chambers. 2011. "Photochemical Properties, Composition, and Structure in Molecular Beam Epitaxy Grown Fe “Doped” and (Fe,N) Codoped Rutile TiO2(110)." Journal of Physical Chemistry C 115(31):15416-15424. doi:10.1021/jp203061n