The thinnest films of copper look flat, but they aren’t
Newfound nanolandscape of valleys and ridges may impact efficiency of electronics
![microscope image of copper](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/07/072617_EC_copper_main.jpg?fit=860%2C460&ssl=1)
COPPER PEAKS A scanning tunneling microscope helped scientists catch the first-ever glimpse of the tiny peaks and valleys found on a thin sheet of copper. This section of metal is about 50 nanometers wide.
X. Zhang et al/Science 2017