Food Safety: A Self‐Healing Nanofiber‐Based Self‐Responsive Time‐Temperature Indicator for Securing a Cold‐Supply Chain (Adv. Mater. 11/2020)

Can you easily recognize spoiled fish? In article number 1907064, Sung Yeon Hwang, Jeyoung Park, Dongyeop X. Oh, and co-workers present innovative time–temperature indicators that show whether fresh foods are diverged from a cold-supply chain. A self-healing nanofiber mat enables highly sensitive, tamper-proof, damage-tolerant, and self-responsive changes in transparency by the flow of thermodynamic free energy.