See if you can find the 8 differences in each set of images.
Fallen stars
Solution cast poly-1,8-octanedithiol crystals.
Mengyuan Li, University of Groningen, The Netherlands
August 2015 answer key
TiO2 landscape
The blue water and brown sand are a film and irregular edge of agglomerated ∼9-nm TiO2 nanoparticles, collected on a 2-nm porous alumina filter (beige cliffs) mounted in a surrounding polymer membrane (green grass). This secondary electron image was collected via field-emission scanning electron microscopy with an accelerating voltage of 15 kV and a working distance of 8.2 mm.
Vincent Palumbo, Materials Science and Engineering Department, University of Connecticut, USA
The answers will be in the February 2016 issue.
