Crafting Hollow Spheres via Bulk Ice Melting with ppb-Level Gas Sensing Performance - Zhuo Chen; Jinrong Wang; Xing Liu; Yao Wang; Jie Shen; Jiaqiang Li; Xianda Liu; Xueyan Li; Wenle Pei; Ying Guo; Guosheng Shi; Hao Li; et al. (Journal of the American Chemical Society, 2025)