Graphene tongue of the future

Chinese scientists built an artificial tongue that can actually remember taste. The trick is a graphene oxide membrane with nanochannels: ions get trapped and move slower, creating a memory effect. The device “remembers” flavor for up to 140 seconds — just like human taste buds. Tests: sour, sweet, salty, bitter — recognized with 98.5% accuracy. It even distinguished coffee vs. cola and their mixes. The membrane behaves like a synapse, strengthening or weakening response and storing signal sequences. 📌 Bottom line: in ten years we might see digital tasters — from smart coffee machines to robot sommeliers.