Two Band Systems of Tungsten Oxide

Amorphous copper tungsten oxide with tunable band gaps

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Tungsten in biological systems.

Tungsten (atomic number 74) and the chemically analogous and very similar metal molybdenum (atomic number 42) are minor yet equally abundant elements on this planet. The essential role of molybdenum in biology has been known for decades and molybdoenzymes are ubiquitous. Yet, it is only recently that a biological role for tungsten has been established in prokaryotes, although not as yet in euka...

Conditions for Shear Band Formation in Tungsten Alloys

Local loading conditions associated with shear banding formation in laboratory -@ten alloy specimens are examined. The specimens consist of compression specimens of large length to diameter ratio made of 91W-6Ni-3Co swaged tungsten alloys tested with the Hopkinson pressure bar and symmetric Taylor techniques. Experimental and numerical results provide insights on the effect of the hydrostatic p...

In-situ Observation of the Growth of Tungsten Oxide Nansotructures

This paper describes a method for producing tungsten oxide nanostructues in an environmental scanning electron microscope. The growth is observed in real time and offers direct observation of the morphology of the tungsten oxide condensed onto the cooler part of a typical W Scanning Electron Microscope filament. We also find that the growth of nanostructures occurs on timescales much shorter th...

Heterogeneous photoreduction of nitrogen to ammonia on tungsten oxide