Air/Water Interfacial Formation of Freestanding, Stimuli‐Responsive, Self‐Healing Catecholamine Janus‐Faced Microfilms

A catecholamine freestanding film is discovered to be spontaneously formed at the air–water interface, and the film has unique properties of robust surface adhesiveness, self-healing, and stimuli-responsive properties. The interfacial film-producing procedure is a simple single step containing polyamines and catechol(amine)s. It is found that oxygen-rich regions existing at an air–water interface greatly accelerate the catecholamine crosslinking reaction. 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.