%0 Journal Article
%A Piqueras de Noriega, Javier
%A Vila Santos, María
%A Díaz-Guerra Viejo, Carlos
%T Laser irradiation-induced α to δ phase transformation in Bi_2O_3 ceramics and nanowires.
%D 2012
%@ 0003-6951
%U https://hdl.handle.net/20.500.14352/44023
%X The α-Bi_2O_3 to δ-Bi_2O_3phase transformation has been locally induced by laser irradiation in ceramic samples and single-crystal nanowires of this oxide. The threshold power densities necessary to induce this transformation, as well as the corresponding transformation kinetics and its temporal stability, have been investigated in both kinds of samples by micro-Raman spectroscopy. The appearance of the δ phase was also monitored by spatially resolved photoluminescence spectroscopy. An emission band peaked near 1.67 eV, not observed in α-Bi_2O_3, is tentatively attributed to δ-Bi_2O_3 near band gap transitions.
%~