TEM showing phase separation of a spin-cast block copolymer – F. Allen 
Gas field ionization source (GFIS) of the helium ion microscope (HIM) 
HIM of Parides sesostris butterfly wing scale, featured by Discover Magazine – F. Allen, R. Thayer, N. Patel 
HIM of scales and hairs on a fly, featured in The Cynical Educator by A. Allen – F. Allen