Fabrication of SWNTs/α-Fe2O3 as room-temperature LPG sensor

Chaitongrat, Buaworn; Chaisitsak, Sutichai

doi:10.1109/icsens.2015.7370467

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2020

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“…The Fe 2p3/2 peak shows the Fe 3+ state at 710.8-710.6 eV at the surface and near-surface area (Figure 4a). The difference between the Fe 2p3/2 and Fe 2p1/2 peak of about 14 eV is evidence of the presence of the Fe 3+ oxidation state [30]. The chemical state of Fe 2+ appears after 39.5 h of etching at 709.4 eV [31].…”

Section: Samples Comositionmentioning

confidence: 98%

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

et al. 2020

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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.

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Section: Samples Comositionmentioning

confidence: 98%