Complementary SEM-AFM of Swelling Bi-Fe-O Film on HOPG Substrate

Abstract

The objective of this work is to study the delamination of bismuth ferrite prepared by atomic layer deposition on highly oriented pyrolytic graphite (HOPG) substrate. The samples’ structures and compositions are provided by XPS, secondary ion mass spectrometry (SIMS) and Raman spectroscopy. The resulting films demonstrate buckling and delamination from the substrates. The composition inside the resulting bubbles is in a gaseous state. It contains the reaction products captured on the surface during the deposition of the film. The topography of Bi-Fe-O thin films was studied in vacuum and under atmospheric conditions using simultaneous SEM and atomic force microscopy (AFM). Besides complementary advanced imaging, a correlative SEM-AFM analysis provides the possibility of testing the mechanical properties by using a variation of pressure. In this work, the possibility of studying the surface tension of the thin films using a joint SEM-AFM analysis is shown.

Surface Modification and Enhancement of Ferromagnetism in BiFeO3 Nanofilms Deposited on HOPG

“…At the initial stage, matrix carbon, as a result of interaction with oxygen and BiO x , partially forms a bismuth oxycarbonate compound (BiO) 2 CO 3 in the film. Considering the SIMS results and the fact that bubbles [ 48 ] begin to form on the film surface, the decomposition of bismuth oxycarbonate is probably the next step: (BiO) 2 CO 3 → Bi 2 O 3 + CO 2 …”

Piezoelectric Current Generator Based on Bismuth Ferrite Nanoparticles

“…The peak of bismuth Bi 4f was characterized with asymmetric duplets of spin-orbit components. The splitting of 5.3 eV and the positions of Bi 4f 7/2 and Bi 4f 5/2 at 158.7 eV and 164.0 eV (correspondingly) confirmed the presence of oxidized bismuth in the powder ( Figure 3 b) and the presence of defect states ( Figure 3 c) [ 31 , 32 ].…”

Surface morphology and X-ray photoelectron spectroscopy of BiFeO3 thin films deposited on top of Ta2O5/Si layers

“…The source for bismuth component was Bi(mmp)3 and ferrocene was the source of iron Fe(C5H5)2. The experiment was repeated in accordance with the preparation of thin BFO films in our previous experiments on the substrate surface of highly oriented pyrolytic graphite [12,13] and TiO2 nanotubes [9,10]. In this work, Ta2O5/Si heterostructures were used as substrates [14] with thickness of Ta2O5 from 20 up to 100 nm.…”