See if you can find the 8 differences in each set of images.
The crystal road
Gold droplets on a gallium arsenide substrate struggle beneath a thin coating of silicon dioxide that inhibits crystal growth. An oxide-free corridor leads to a scarlet eruption of gold-tipped gallium arsenide crystals during metal–organic chemical vapor deposition.
David J. Dvorak, Simon Fraser University, Canada.
August 2017 answer key
Dessin
Core–shell germanium nanowires.
Kevin Guilloy, Aarhus University, Denmark.
Answers will be published in the December 2017 issue.