Structure-Dependent CO₂ Gas Sensitivity of La₂O₂CO₃ Thin Films

Figure 4

X-ray diffraction patterns of ex situ and in situ annealed films showing hexagonal or monoclinic polymorph of ex situ annealed film and monoclinic structure of in situ annealed film. A pattern denoted as MONO is calculated for monoclinic phase (ICSD collection code 51468), HEX is calculated for hexagonal phase (ICSD collection code 202988), TETRA denotes the peak positions together with their Miller indices of tetragonal phase (ICDD PDF-2 file number 23-0320), and MONOC denotes the peak positions together with Miller indices of monoclinic phase (ICDD PDF-2 file number 48-1113).