26 February 2020
Vol 5, Issue 39

About The Cover

Cover image expansion

ONLINE COVER Ferrobots Get to Work. Automated guided vehicles (AGV) autonomously distribute cargo in settings such as factories and hospitals. Standard AGV systems consists of three elements: cargo, robotic carriers, and a navigation floor. Inspired by AGVs, Yu et al. have developed a microfluidic system where aqueous droplets containing biocompatible magnetic nanoparticles (cargo) are moved using miniature mobile magnets, or "ferrobots" (robotic carriers), along a 2D electromagnetic coiled surface (navigation floor). This month's cover is an illustration depicting collaborative ferrobots shuttling micro/nano-ferrofluids around a microfluidic chamber and dispensing droplets. [CREDIT: WENZHUO YU and HAISONG LIN/UCLA]