In-situ high-pressure X-ray diffraction study on the influence of the dopant element in the elastic properties of SnO2 nanoparticles

SERGIO FERRARI; V. BILOVOL; L. G. PAMPILLO; F. GRINBLAT; D. ERRANDONEA; C. POPESCU

Río de Janeiro

Conferencia; The 27th AIRAPT international conference on High Pressure Science and Technology; 2019

AIRAPT

In this work we present a comparison of the elastic properties of tin dioxide (undoped and doped with different transition metals) nanoparticles obtained by co-precipitation technique. The samples with stoichiometry SnO2 [1], Sn0.95V0.05O2 [2], Sn0.95Co0.05 and Sn0.9Fe0.1O2 [1] were subjected to High Pressure in a Diamond Anvil Cell (DAC) and studied by in-situ X-ray diffraction, being LNLS (Brazil) or ALBA (Spain) the synchrotrons used as the source of the X-ray radiation. The analysis of the X-ray patterns adcquired at different pressures allowed the evaluation of axial and volume compressibility of the mentioned samples. We find that Co-doped tin dioxide is the less compressible one, with the lowest linear compressibilities (Ka = 1.723 x 10^ -3 GPa-1 and Kc = 0.783 x 10-3 GPa-1 ) values and a bulk modulus (B0 = 2082 GPa) which is bigger than the one obtained for the undoped sample.