1 Supporting Information In situ Tracking of Low-Temperature VO 2 Crystallization via Photocombustion and Characterization of Phase-Transition Reliability on Large-area Flexible Substrates Yong-Ryun Jo, †,‡ Won-June Lee, †,‡ Myung-Han Yoon,* ,† and Bong-Joong Kim* ,† † School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea ‡ These authors contributed equally to this work. *Corresponding authors:, Prof. Myung-Han Yoon, Email: mhyoon@gist.ac.kr Prof. Bong-Joong Kim, Email: kimbj@gist.ac.kr