Journal ArticleCeO ₂ Nanostructures Prepared by Selective Water‐Soluble Sr ₃ Al ₂ O ₆ (SAO)‐CeO ₂ Vertically Aligned NanocompositeKunhung_Tsai, Benson; Huang, Jialong; Shen, Jianan; Zhang, Yizhi; Barnard, James P; Mihalko, Claire A; Choudhury, Abhijeet; Zhou, Shiyu; Wang, Haiyan<p>The unique redox properties and high oxygen capacity of nanostructured CeO₂demonstrate a wide range of applications, such as electrolytes for solid oxide fuel cells, gas sensors, and catalysis for automotive exhaust gas. Most CeO₂nanomaterials are prepared by chemical synthesis or hard templating methods. An effective way to obtain highly textured, small‐radius dimensions with high specific surface area remains challenging. Here, highly textured CeO₂nanostructures with various shapes ranging from nanowires to nanoporous thin films are successfully synthesized. Vertically aligned nanocomposites (VANs) of Sr₃Al₂O₆(SAO) and CeO₂are synthesized first while varying concentration ratio between them. Once the SAO is dissolved in water, the remaining CeO₂forms distinct nanostructures. The thermal stability of the nanostructured CeO₂is evaluated by<italic>in situ</italic>heating XRD and thermal annealing tests. This method provides an alternative approach to preparing nanostructured CeO₂without toxic chemical solutions or complex micro/nanofabrication techniques. These results present a novel approach to prepare nanostructured CeO₂for future sensing and energy device applications.</p>Wiley2025-07-2610635086Advanced Engineering Materials1438-1656https://doi.org/10.1002/adem.2025005302323752; 2016453National Science Foundation