Prof. Pan Xu's team at the Institute of Solid State Physics, Hefei Institutes of Physical Science (HFIPS), Chinese Academy of Science (CAS), in collaboration with Zheng Xiaojia at the Chinese Academy of Engineering Physics (CAEP), and other researchers, discovered the remarkable potential of one-dimensional (1D) δ-phase formamidinium lead iodide (δ-FAPbI3) as an advanced material for X-ray detection.