Publications by authors named "Andre Luis de Jesus Pereira"
We report a joint high-pressure experimental and theoretical study of the structural, vibrational, and photoluminescent properties of pure and Eu-doped cubic YO nanoparticles with two very different average particle sizes. We compare the results of synchrotron X-ray diffraction, Raman scattering, and photoluminescence measurements in nanoparticles with ab initio density-functional simulations in bulk material with the aim to understand the influence of the average particle size on the properties of pure and doped YO nanoparticles under compression. We observe that the high-pressure phase behavior of YO nanoparticles depends on the average particle size, but in a different way to that previously reported.
View Article and Find Full Text PDFThe structural, vibrational and electronic properties of the compressed β-Sb2O3 polymorph, a.k.a.
View Article and Find Full Text PDFArticle Synopsis
- SbPO is a unique monoclinic layered material known for its active lone electron pair from antimony (Sb), which leads to a distinct layered structure bound by weak electrostatic interactions with oxygen (O).
- A recent study reveals that SbPO exhibits extreme compressibility and anisotropic behavior under high pressure, particularly compressing along a specific direction due to the characteristics of the electron pair and interlayer bonds.
- Notably, at pressures above 3 GPa, SbPO transitions from a 2D to a 3D structure, with a pressure-induced phase transition occurring beyond 9 GPa, suggesting a structural change to a triclinic form, which could enhance its applications in ion intercalation and catalysis.