​Hong Cheng, Yilei Zhao, Xiaoying Wei, Qianlei Zhang, Erjie Yang, Yuqi Xiong, Jianhe Zhu, Zishuo Wu, Jungen Chen, and Wei Chen, Supercooling and Solvent Depletion-Driven Poly(vinyl Alcohol) Film Formation Mechanism as Elucidated by In Situ Synchrotro