RT Journal Article
T1 Formation of beta-Bi₂O₃ and delta-Bi₂O₃ during laser irradiation of Bi films studied in-situ by spatially resolved Raman spectroscopy
A1 Díaz-Guerra Viejo, Carlos
A1 Almodóvar, Paloma
A1 Camacho López, M.
A1 Camacho López, S.
A1 Piqueras De Noriega, Francisco Javier
AB 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.
PB Elsevier Science SA
SN 0925-8388
YR 2017
FD 2017-10-05
LK https://hdl.handle.net/20.500.14352/18212
UL https://hdl.handle.net/20.500.14352/18212
LA eng
NO © 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.
NO Ministerio de Economía y Competitividad (MINECO)
NO AFOSR
DS Docta Complutense
RD 8 abr 2025