Formation of β-Bi2O3 and δ-Bi2O3 during laser irradiation of Bi films studied in-situ by spatially resolved Raman spectroscopy

JOURNAL OF ALLOYS AND COMPOUNDS

卷:723

Article

Diaz-Guerra, C.¹  Almodovar, P.¹  Camacho-Lopez, M.²  Camacho-Lopez, S.³  Piqueras, J.¹ 

[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Mat, Ciudad Univ S-N, E-28040 Madrid, Spain

[2] Univ Autonoma Estado Mexico, Fac Quim, Lab Invest & Desarrolo Mat Avanzados, Campus Rosedal,Km 14-5 Carretera, San Cayetano De Morelos 50925, Toluca, Mexico

[3] Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico

关键词: Oxide materials;    Laser processing;    Phase transitions;    Inelastic light scattering;   

DOI  :  10.1016/j.jallcom.2017.06.263

来源: Elsevier

【 摘 要 】

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 beta-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 delta-Bi2O3 phases. The amount of the produced delta-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 delta-Bi2O3 patterns on Bi films. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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