Arindom Chatterjee, working towards his PhD at the ICN2 Nanomaterials Growth Unit, led by Dr Jose Santiso, was one of 10 awardees for Best Poster at the 21st International Conference on Solid State Ionics, held in Padua, Italy, last June. Selected from among over 500 posters, his outlines a study by X-ray diffraction of oxygen surface exchange behaviour in thin films of mixed ionic-electronic conducting oxides.