Physically Transient Distributed Feedback Laser Using Optically Activated Silk Bio‐Ink

Optically activated silk bio-ink is used to realize a physically transient distributed feedback laser. By water-washing and recoating, a fresh single-use laser can be easily obtained. Along with reliable lasing, a chemosensing application to detect a toxic acid vapor is presented. 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.