Publication: Formation of beta-Bi₂O₃ and delta-Bi₂O₃ during laser irradiation of Bi films studied in-situ by spatially resolved Raman spectroscopy
Loading...
Official URL
Full text at PDC
Publication Date
2017-10-05
Authors
Almodóvar, P.
Camacho López, M.
Camacho López, S.
Piqueras de Noriega, Javier
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science SA
Citations
Exportar
Abstract
The formation of different phases of Bi₂O₃ induced by laser irradiation of Bi films has been assessed in situ by micro-Raman spectroscopy as a function of laser wavelength, power density and irradiation time. Raman mapping of the irradiated samples enabled a spatially-resolved study of the distribution of the formed Bi₂O₃ phases. Red laser (633 nm) irradiation was found to induce the appearance of ß- Bi₂O₃, within a certain range of power densities, by diffusion- controlled processes. In contrast, ultraviolet (UV, 325 nm) laser irradiation, above a certain power density threshold, initially induces the formation of both beta and δ- Bi₂O₃ phases. The amount of the produced δ- Bi₂O₃ phase increases by increasing the irradiation time, while that of the beta phase follows the opposite trend. UV laser irradiation seems to be a suitable method to produce room temperature stable δ- Bi₂O₃ patterns on Bi films.
Description
© 2017 Elsevier B.V. All rights reserved.
The authors are indebted to Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM for XPS measurements. This work was supported by MINECO through projects MAT2012-31959, MAT2015-65274-R, CSD2009-0013 and it was partially supported by AFOSR grant FA9550-15-1-0142.