Discovery of an Unexpected Boost for Solar Water-Splitting Cells (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption Scanning electron microscope image of typical titania nanotubes for a photocatalytic cell to produce hydrogen gas from water. Nanotubes average roughly 90-100 nanometers in diameter. Credit Credit: Menon, Northeastern University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.