Electron irradiation damage in oxides

Buckett, M. I.; Strane, J.; Luzzi, David E.; Zhang, J.P.; Wessels, B. W.; Marks, Laurence D.

doi:10.1016/0304-3991(89)90249-0

Cited by 66 publications

(30 citation statements)

References 23 publications

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“…S6; Supporting Information). The bubble migration observed here is also different from other reported irradiation-induced bubbles (or voids) by high-energy particles under high temperatures, such as neutrons, α-particles, and electrons (Tables S2 and S3), where bubbles (or voids) mostly stay inside the solid (25)(26)(27). It has been reported that the temperature rise in a liquid cell induced from the electron beam irradiation is small (only a few degrees or less) (28)(29)(30), therefore, we consider a critical factor, i.e., the elastic strain contribution to the observed bubble migration rather than the electron beam heating.…”

Section: Resultscontrasting

confidence: 53%

Bubble nucleation and migration in a lead–iron hydr(oxide) core–shell nanoparticle

Niu

Frolov

Xin

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Iron hydroxide is found in a wide range of contexts ranging from biominerals to steel corrosion, and it can transform to anhydrous oxide via releasing O 2 gas and H 2 O. However, it is not well understood how gases transport through a crystal lattice. Here, we present in situ observation of the nucleation and migration of gas bubbles in iron (hydr)oxide using transmission electron microscopy. We create Pb-FeOOH model core-shell nanoparticles in a liquid cell. Under electron irradiation, iron hydroxide transforms to iron oxide, during which bubbles are generated, and they migrate through the shell to the nanoparticle surface. Geometric phase analysis of the shell lattice shows an inhomogeneous stain field at the bubbles. Our modeling suggests that the elastic interaction between the core and the bubble provides a driving force for bubble migration.bubbles | nucleation | liquid cell | TEM | core-shell nanoparticle

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Section: Resultscontrasting

confidence: 53%

Bubble nucleation and migration in a lead–iron hydr(oxide) core–shell nanoparticle

Niu

Frolov

Xin

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…In this short paper, we report our first observation of electron beam induced changes in typical transition metal oxides It was reported that under the electron beam MoO 3 could be reduced to metallic molybdenum [3]. Our observation, however, cannot confirm this finding since after 60 min of irradiation we can still detect oxygen signal, although the diffraction pattern changes to the one as from f.c.c.…”

Section: Introductioncontrasting

confidence: 62%

Electron beam induced changes in transition metal oxides

2002

Analytical and Bioanalytical Chemistry

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Electron beam induced changes in maximum valence transition metal oxides V2O5, MoO2 and TiO2 (anatase) were studied by means of electron energy-loss spectroscopy and electron diffraction in a transmission electron microscope. For V2O5, the observed chemical shifts of the L-edge reveal the reduction of V 5+ to V 2+ , while its structure changes from orthorhombic V2O5 to cubic VO. The orthorhombic MoO3 can be reduced to a phase with an oxidation state lower than that in MoO2. This phase has a cubic or tetragonal structure with a = c = 0.408 nm. For TiO2 (anatase), no noticeable changes in the intensity of the O K-edge can be observed. The main structure symmetry prevails during the electron irradiation.

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“…It was deduced that such structural changes of Au particles depended on the changes in the oxidation state or the density of oxygen vacancies in CeO 2 support induced by electron beam irradiation. It is well-known as electron stimulated desorption that the metal oxides are reduced by electron beam irradiation with low energy [8] and high energy [9][10][11][12][13]. Although the reduction and oxidation conditions used in the catalytic reaction are quite different from the electron beam reduction in the vacuum, it is valuable to investigate the detailed structure of Au and CeO 2 depending on the oxidation state of cerium oxide.…”

Section: Introductionmentioning

confidence: 99%