Stanford University scientists have built the first solar cell made entirely of carbon, a promising alternative to the expensive materials used in photovoltaic devices today.Research out this week from the University of Cincinnati brings industry and consumers closer to several improvements in e-Readers and tablets, including a simpler and more colorful way to make rollable and foldable devices.Researchers at HRL Laboratories, LLC, announced they have developed the world's lightest material with a density of 0.9 mg/cc, approximately one hundred times lighter than Styrofoam.Researchers have introduced a new method for monitoring the growth of bacteria: The fluorescence of nanoparticles embedded in an agarose growth medium changes significantly when the pH value changes because of bacterial metabolism. This can be monitored in real time with a simple digital camera.An international team of researchers led by Empa, the Swiss Federal Laboratories for Materials Science and Technology, have now gained in-depth insights into the electronic structure of an iron oxide electrode - while it was in operation. This opens up new possibilities for an affordable hydrogen production from solar energy.Researchers succeeded in the production of a porous layer of titanium dioxide nanotubes on the titanium surface by using titanium as the sub-layer and its anodization in organic solutions.