Novel three-dimensional TiO2-Fe3O4@polypyrrole composites with tunable microwave absorption in the 2–40 GHz frequency range. - Liu, Fubin; Li, Cuiping; Jiang, Xiaohui; Waterhouse, Geoffrey I. N.; Xing, Cuijuan; Zhang, Zhiming; Yu, Liangmin (Journal of Materials Science, 2020)