Research Website of David Keffer at the University of Tennessee

The University of Tennessee
Computational Materials Research Group

Metal and Metal Oxide Nanoparticles The investigation of the atomic structure of metal and metal oxide nanoparticles is a research project advised by David Keffer (Chemical and Biomolecular Engineering, University of Tennessee). The images on these pages were created by Dr. David Keffer, Qianping He, Elisa Calvo-Muñoz, Stephanie Miller, Bailey Primm & J.P. Luna. The JavaScript code JSMol is used to view and interact with these structures. Older browsers are directed to an archival version of the site, using the Chime plug-in. In 2014, Eleanor Leffler at the University of Tennessee updated these pages from Chime to JSMol.
platinum titania silica platinum on graphite platinum on graphite with Nafion oxidized platinum on oxidized graphite oxidized platinum on oxidized graphite with Nafion platinum/oxidized platinum on pristine/oxidized graphite with Nafion of different film thickness pristine/oxidized graphite with Nafion of different film thickness (no platinum/oxidized platinum nanoparticle)
	platinum
	platinum - cube 2 nm 4 nm 6 nm
	platinum - cuboctahedron 2 nm 4 nm 6 nm
	platinum - octahedron 2 nm 4 nm 6 nm
	platinum - tetrahedron 2 nm 4 nm 6 nm
	platinum - truncated cube 2 nm 4 nm 6 nm
	platinum - truncated octahedron 2 nm 4 nm 6 nm
	oxidized platinum - tetrahedron 2 nm 4 nm 6 nm
	titania
	titania (rutile) - square prism - no hydrogen 2 nm 4 nm 6 nm
	titania (rutile) - square prism with flat edges - no hydrogen 4 nm 6 nm
	silica
	silica (a-quartz) - hexagonal prism with flat edges - no hydrogen 2 nm 4 nm 6 nm
	platinum on graphite
	graphite surfaces clean graphite graphite with 10% oxidation (epoxy) graphite with 25% oxidation (epoxy) graphite with 50% oxidation (epoxy) graphite with 10% oxidation (hydroxyl) graphite with 25% oxidation (hydroxyl) graphite with 50% oxidation (hydroxyl)
	platinum - cube 2 nm Pt cube on clean graphite 4 nm Pt cube on clean graphite 6 nm Pt cube on clean graphite 4 nm Pt cube on graphite with 10% oxidation (epoxy) 4 nm Pt cube on graphite with 25% oxidation (epoxy) 4 nm Pt cube on graphite with 50% oxidation (epoxy) 4 nm Pt cube on graphite with 10% oxidation (hydroxyl) 4 nm Pt cube on graphite with 25% oxidation (hydroxyl) 4 nm Pt cube on graphite with 50% oxidation (hydroxyl)
	platinum - cuboctahedron 2 nm Pt cuboctahedron on clean graphite 4 nm Pt cuboctahedron on clean graphite 6 nm Pt cuboctahedron on clean graphite
	platinum - octahedron 2 nm Pt octahedron on clean graphite 4 nm Pt octahedron on clean graphite 6 nm Pt octahedron on clean graphite
	platinum - tetrahedron 2 nm Pt tetrahedron on clean graphite 4 nm Pt tetrahedron on clean graphite 6 nm Pt tetrahedron on clean graphite
	platinum - truncated octahedron 2 nm Pt truncated octahedron on clean graphite 4 nm Pt truncated octahedron on clean graphite 6 nm Pt truncated octahedron on clean graphite
	platinum on graphite with Nafion
	platinum - cube 2 nm Pt cube on clean graphite (λ = 3) at minimum separation distance 2 nm Pt cube on clean graphite (λ = 3) at moderate separation distance 2 nm Pt cube on clean graphite (λ = 3) movie 2 nm Pt cube on clean graphite (λ = 6) at minimum separation distance 2 nm Pt cube on clean graphite (λ = 6) at moderate separation distance 2 nm Pt cube on clean graphite (λ = 6) movie 2 nm Pt cube on clean graphite (λ = 9) at minimum separation distance 2 nm Pt cube on clean graphite (λ = 9) at moderate separation distance 2 nm Pt cube on clean graphite (λ = 9) movie 2 nm Pt cube on clean graphite (λ = 15) at minimum separation distance 2 nm Pt cube on clean graphite (λ = 15) at moderate separation distance 2 nm Pt cube on clean graphite (λ = 15) movie 4 nm Pt cube on clean graphite (λ = 3) at minimum separation distance 4 nm Pt cube on clean graphite (λ = 3) at moderate separation distance 4 nm Pt cube on clean graphite (λ = 3) movie 4 nm Pt cube on clean graphite (λ = 15) at minimum separation distance 4 nm Pt cube on clean graphite (λ = 15) at moderate separation distance 4 nm Pt cube on clean graphite (λ = 15) movie 6 nm Pt cube on clean graphite (λ = 3) at minimum separation distance 6 nm Pt cube on clean graphite (λ = 3) at moderate separation distance 6 nm Pt cube on clean graphite (λ = 3) movie 6 nm Pt cube on clean graphite (λ = 15) at minimum separation distance 6 nm Pt cube on clean graphite (λ = 15) at moderate separation distance 6 nm Pt cube on clean graphite (λ = 15) movie
	platinum - octahedron 2 nm Pt octahedron on clean graphite (λ = 3) at minimum separation distance 2 nm Pt octahedron on clean graphite (λ = 3) at moderate separation distance 2 nm Pt octahedron on clean graphite (λ = 3) movie 2 nm Pt octahedron on clean graphite (λ = 15) at minimum separation distance 2 nm Pt octahedron on clean graphite (λ = 15) at moderate separation distance 2 nm Pt octahedron on clean graphite (λ = 15) movie
	platinum - tetrahedron 2 nm Pt tetrahedron on clean graphite (λ = 3) at minimum separation distance 2 nm Pt tetrahedron on clean graphite (λ = 3) at moderate separation distance 2 nm Pt tetrahedron on clean graphite (λ = 3) movie 2 nm Pt tetrahedron on clean graphite (λ = 15) at minimum separation distance 2 nm Pt tetrahedron on clean graphite (λ = 15) at moderate separation distance 2 nm Pt tetrahedron on clean graphite (λ = 15) movie 4 nm Pt tetrahedron on clean graphite (λ = 3) at minimum separation distance 4 nm Pt tetrahedron on clean graphite (λ = 3) at moderate separation distance 4 nm Pt tetrahedron on clean graphite (λ = 3) movie 6 nm Pt tetrahedron on clean graphite (λ = 3) at minimum separation distance 6 nm Pt tetrahedron on clean graphite (λ = 3) at moderate separation distance 6 nm Pt tetrahedron on clean graphite (λ = 3) movie
	platinum - truncated octahedron 2 nm Pt truncated octahedron on clean graphite (λ = 3) at minimum separation distance 2 nm Pt truncated octahedron on clean graphite (λ = 3) at moderate separation distance 2 nm Pt truncated octahedron on clean graphite (λ = 3) movie 2 nm Pt truncated octahedron on clean graphite (λ = 15) at minimum separation distance 2 nm Pt truncated octahedron on clean graphite (λ = 15) at moderate separation distance 2 nm Pt truncated octahedron on clean graphite (λ = 15) movie
	oxidized platinum on oxidized graphite
	oxidized platinum - epoxy oxidized tetrahedron 2 nm PtO tetrahedron on 0% epoxy oxidized graphite 4 nm PtO tetrahedron on 0% epoxy oxidized graphite 6 nm PtO tetrahedron on 0% epoxy oxidized graphite 2 nm PtO tetrahedron on 10% epoxy oxidized graphite 4 nm PtO tetrahedron on 10% epoxy oxidized graphite 6 nm PtO tetrahedron on 10% epoxy oxidized graphite 2 nm PtO tetrahedron on 25% epoxy oxidized graphite 4 nm PtO tetrahedron on 25% epoxy oxidized graphite 6 nm PtO tetrahedron on 25% epoxy oxidized graphite 2 nm PtO tetrahedron on 50% epoxy oxidized graphite 4 nm PtO tetrahedron on 50% epoxy oxidized graphite 6 nm PtO tetrahedron on 50% epoxy oxidized graphite
	oxidized platinum - hydroxyl oxidized tetrahedron 2 nm PtO tetrahedron on 0% hydroxyl oxidized graphite 4 nm PtO tetrahedron on 0% hydroxyl oxidized graphite 6 nm PtO tetrahedron on 0% hydroxyl oxidized graphite 2 nm PtO tetrahedron on 10% hydroxyl oxidized graphite 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite 6 nm PtO tetrahedron on 10% hydroxyl oxidized graphite 2 nm PtO tetrahedron on 25% hydroxyl oxidized graphite 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite 6 nm PtO tetrahedron on 25% hydroxyl oxidized graphite 2 nm PtO tetrahedron on 50% hydroxyl oxidized graphite 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite 6 nm PtO tetrahedron on 50% hydroxyl oxidized graphite
	oxidized platinum on oxidized graphite with Nafion
	oxidized platinum - epoxy oxidized tetrahedron 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 3) with moderate separation 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 3) movie 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 9) with moderate separation 4 nm PtO tetrahedron on 10% epoxy oxidized graphite (λ = 9) movie 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 3) with moderate separation 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 3) movie 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 9) with moderate separation 4 nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 9) movie 4 nm PtO tetrahedron on 50% epoxy oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 50% epoxy oxidized graphite (λ = 6) with minimal separation 4 nm PtO tetrahedron on 50% epoxy oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 50% epoxy oxidized graphite (λ = 15) with minimal separation
	oxidized platinum - hydroxyl oxidized tetrahedron 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 3) with moderate separation 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 3) movie 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 9) with moderate separation 4 nm PtO tetrahedron on 10% hydroxyl oxidized graphite (λ = 9) movie 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 3) with moderate separation 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 3) movie 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 9) with moderate separation 4 nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 9) movie 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 3) with minimal separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 3) with moderate separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 3) movie 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 6) with minimal separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 6) with moderate separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 6) movie 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 9) with minimal separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 9) with moderate separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 9) movie 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 15) with minimal separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 15) with moderate separation 4 nm PtO tetrahedron on 50% hydroxyl oxidized graphite (λ = 15) movie
	platinum/oxidized platinum on pristine/oxidized graphite with Nafion of different film thickness
	platinum/oxidized platinum system 4nm Pt tetrahedron on pristine graphite (λ = 3, film thickness = 1 nm) 4nm Pt tetrahedron on pristine graphite (λ = 9, film thickness = 1 nm) 4nm Pt tetrahedron on pristine graphite (λ = 3, film thickness = 2 nm) 4nm Pt tetrahedron on pristine graphite (λ = 9, film thickness = 2 nm) 4nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 3, film thickness = 1 nm) 4nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 9, film thickness = 1 nm) 4nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 3, film thickness = 2 nm) 4nm PtO tetrahedron on 25% epoxy oxidized graphite (λ = 9, film thickness = 2 nm) 4nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 3, film thickness = 1 nm) 4nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 9, film thickness = 1 nm) 4nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 3, film thickness = 2 nm) 4nm PtO tetrahedron on 25% hydroxyl oxidized graphite (λ = 9, film thickness = 9 nm)
	pristine/oxidized graphite with Nafion of different film thickness (no platinum/oxidized platinum nanoparticle)
	No platinum system 1 nm Nafion film on pristine graphite (λ = 3) 1 nm Nafion film on pristine graphite (λ = 9) 1 nm Nafion film on 25% epoxy oxidized graphite (λ = 3) 1 nm Nafion film on 25% epoxy oxidized graphite (λ = 9) 1 nm Nafion film on 25% hydroxyl oxidized graphite (λ = 3) 1 nm Nafion film on 25% hydroxyloxidized graphite (λ = 9) 2 nm Nafion film on pristine graphite (λ = 3) 2 nm Nafion film on pristine graphite (λ = 9) 2 nm Nafion film on 25% epoxy oxidized graphite (λ = 3) 2 nm Nafion film on 25% epoxy oxidized graphite (λ = 9) 2 nm Nafion film on 25% epoxy oxidized graphite (λ = 3) 2 nm Nafion film on 25% epoxy oxidized graphite (λ = 9)

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