Experimental evidence of self-assembly CeO2 particles in solution: formation of singlecrystalline porous CeO2 nanocrystals Ming Lin1*, Hui Ru Tan1, Pei Ying Joyce Tan1, Chris Boothroyd2, Thomas W Hansen2, Yong Lim Foo1 1
Institute of Materials Research and Engineering, A*STAR (Agency for Science,
Technology and Research), 3 Research Link, S117602, Singapore 2
Center for Electron Nanoscopy, Technical University of Denmark, DK-2800 Lyngby,
Denmark
Corresponding author. Email:
[email protected] Figure S1. Comparison of (a) bright-Field TEM and (b) HAADF-STEM images of porous CeO2 nanoparticles at the same area.
Figure S2. (a) Bright-Field TEM image, (b) HAADF-STEM image and (c) 3D isosurface rendering of the particles, the particle indicated by arrow is analyzed in the paper.
Figure S3. HAADF-STEM image of CeO2 nanocrystals with an irregular truncated octahedral shape. No HNO3 was added for the second hydrothermal treatment of the nanoparticles. Some pores and channels still can be found in the crystals with careful examination, which are highlighted by circles and arrows. This indicates that the porous CeO2 nanocrystals are not formed by etching of the acid, but through the oriented aggregation of small crystals.
