Graphene Oxide Paper Manipulation of Micro-Reactor Drops

Digital microfluidics, which relies on the movement of drops, is relatively immune to clogging problems, making it suited for micro-reactor applications. Here, graphene oxide paper 100 μm thickness, fabricated by blade coating sedimented dispersions onto roughened substrates, followed drying and mechanical exfoliation, was found be free cracks curling. It also exhibited high wettability elasto-capillary characteristics. Possessing low enough stiffness, could rapidly totally self-wrap water drops 20 μL volume placed 2 mm from its edge when oriented between 0 60° horizontal. This complete wrapping behavior allowed translated via over long distances without dislodgement notwithstanding accelerations decelerations. An amount that were wrapped with separate papers, collided each other at speeds up 0.64 m/s, eschew coalescence. portends development robust digital microfluidic approaches micro-reactors.