Bi to beta-Bi2O3 thin films transformation by thermal oxidation in air at low temperature
Por:
Camacho-Lopez, M., Ballesteros-Balbuena, M., Esparza-Garcia, A., Flores-Castaneda, M., Camacho-Lopez, S., Camacho-Lopez, M. A.
Publicada:
15 nov 2022
Resumen:
Bismuth oxidation by thermal treatment has been studied by several
groups, however, low temperature (well below melting) oxidation is
rarely reported in the literature. In this work, we focused on the
straightforward phase transition from bismuth to the beta-Bi2O3 phase,
by gradually heating the bismuth film. This is proved that by carrying
out the oxidation process at the low temperature 175 degrees C (as
compared to the melting temperature 271 degrees C) it is possible to
turn pristine bismuth into beta-Bi2O3. In order to achieve this
transformation, the thermal treatment was span for up to 10 h, finding
that at 6 h the initially opaque bismuth film becomes optically
translucid, meaning that the bismuth oxide beta phase is reaching
downwards to the substrate. For 8 and 10 h of thermal treatment the
bismuth film is clearly fully oxidized. The bismuth to beta-Bi2O3
transformation was characterized by using Raman micro-spectroscopy,
UV-Vis Spectroscopy, Scanning Electron Microscopy (SEM) and Atomic Force
Microscopy (AFM). Our results demonstrated a feasible, simple and
reliable method for the synthesis of beta-Bi2O3, at well below melting
temperature.
Filiaciones:
Camacho-Lopez, M.:
(Corresponding Author), Univ Autonoma Estado Mexico, Fac Quim, Lab Invest & Desarrollo Mat Avanzados, Campus Rosedal,Km 14-5 Carretera Toluca Atlacomul, Toluca 50295, Mexico
Univ Autonoma Estado Mexico, Fac Quim, Lab Invest & Desarrollo Mat Avanzados, Campus Rosedal,Km 14-5 Carretera Toluca Atlacomul, Toluca 50295, Mexico
A
Ballesteros-Balbuena, M.:
Univ Autonoma Estado Mexico, Fac Quim, Lab Invest & Desarrollo Mat Avanzados, Campus Rosedal,Km 14-5 Carretera Toluca Atlacomul, Toluca 50295, Mexico
Esparza-Garcia, A.:
Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, DF, Mexico
Flores-Castaneda, M.:
Mexico CONACYT Ctr Invest Cient & Educ Super Ense, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico
Camacho-Lopez, S.:
(Corresponding Author), Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico
Ctr Invest Cient & Educ Super Ensenada, Dept Opt, Carretera Ensenada Tijuana 3918, Ensenada 22860, Baja California, Mexico
Camacho-Lopez, M. A.:
A
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