- Issue 1 |
- August 2009
“Where do all the elements that make up our bodies and our world come from?”
For most of recorded history, the answer to this question has been the stuff of speculation, if not myth. Today DOE scientists, in concert with their colleagues around the world, synergistically combine cutting edge measurements in nuclear accelerator labs with computer simulations and satellite observations to probe the mysteries of our Galaxy and the Universe.
Simultaneous axial and radial epitaxies have many applications. However, until recently they eluded researchers. Scientists, including three from Oak Ridge National Laboratory, have now demonstrated the realization of simultaneous axial and radial epitaxies by growing ZnO microtowers through a regrowth technique of repeating the same growth cycle (loading the source material, heating, growing, cooling, exposing to air, and repeating) 2-10 times inside a well-controlled tube-furnace system.
Exploring the Role of Charge in Formation of Metal Clusters on Nanostructured Carbons
In the search for an energy carrier for renewable energy, hydrogen has great appeal. It is both abundant and environmentally friendly. There is a problem, however: currently, there is no way to store the hydrogen with high gravimetric and volumetric densities. Without this density, the hydrogen will take up too much room to be practical.
Lignin is the second most abundant naturally occurring biopolymer found in vascular plants, and is a byproduct of making paper. Currently, this byproduct gets burned, but with the proper understanding and development, it could possibly be used as a renewable source of fuel and chemicals. While there is already a significant understanding of the thermal breakdown processes in materials made of carbon and hydrogen, less is known about the thermochemical conversion of materials containing oxygen like lignin.