Oriented Graphene Foam with Tunable Wettability by Electrocapillary for Switchable and Ultra‐Fast Imbibition

Electrocapillary endows an oriented graphene foam (OGF) with tunable wettability for efficient imbibition. By applying a small negative potential, OGF can be transformed from hydrophobic to hydrophilic. Thanks to its large pore sizes and much less tortuous channels, OGF shows switchable imbibition with an extremely high dynamic rate. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.