By systematically using an array of spectroscopic techniques and other tools, Ertl was able to reveal the complete 7 - step process whereby nitrogen and hydrogen molecules land on an iron surface, break apart, and react to form ammonia. (sciencemag.org)
For development of innovative spectroscopic techniques based on femtosecond optical frequency combs (osa.org)
Using this new spectroscopic technique, scientists were able to confirm its orbit. (science.howstuffworks.com)