Postdoc Yuval Vidavsky’s paper entitled Modulating Metallopolymer Mechanical Properties by Controlling Metal Ligand Crosslinking is featured as the cover article in the June issue of the Journal of Polymer Science: Polymer Chemistry. Yuval conceived, synthesized, and tested a series of polymers that can be reversibly crosslinked by addition and removal of copper cations, thereby tailoring the stiffness and strength.  Further, he showed that the crosslink strength and therefore the dynamic behavior of the material could be modulated in the solid state by exposure to different gasses. PhD candidate Suwon Bae made a key contribution to this work by conducting and analyzing the mechanical experiments. Credit to first year graduate student Steven Yang for making the cover art from Yuval’s specimens.