Discerning interface atomistic structure by phase contrast in STEM: The equilibrated Ni-YSZ interface

Nahor, Hadar; Kauffmann, Yaron; Lazar, S.; Shilo, Doron; Kaplan, Wayne D.

doi:10.1016/j.actamat.2018.05.011

Cited by 15 publications

(8 citation statements)

References 28 publications

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“…iDPC‐STEM has also been shown to decrease the dose rate for atomic‐resolution imaging of a zeolite by a factor of five 270. Additionally, iDPC‐STEM technique is quite sensitive and can be used to map the strain fields,271 electric fields,265 and electromagnetic fields 257…”

Section: Technological and Methodological Innovationsmentioning

confidence: 99%

Imaging Beam‐Sensitive Materials by Electron Microscopy

et al. 2020

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Electron microscopy allows the extraction of multidimensional spatiotemporally correlated structural information of diverse materials down to atomic resolution, which is essential for figuring out their structureproperty relationships. Unfortunately, the high-energy electrons that carry this important information can cause damage by modulating the structures of the materials. This has become a significant problem concerning the recent boost in materials science applications of a wide range of beam-sensitive materials, including metal-organic frameworks, covalent-organic frameworks, organicinorganic hybrid materials, 2D materials, and zeolites. To this end, developing electron microscopy techniques that minimize the electron beam damage for the extraction of intrinsic structural information turns out to be a compelling but challenging need. This article provides a comprehensive review on the revolutionary strategies toward the electron microscopic imaging of beamsensitive materials and associated materials science discoveries, based on the principles of electron-matter interaction and mechanisms of electron beam damage. Finally, perspectives and future trends in this field are put forward. he worked as a postdoctoral fellow and research scientist at King Abdullah University of Science and Technology. His research interests now focus on low-dose electron microscopy and structural elucidation of beam-sensitive materials for applications such as catalysis, gas separation, and energy conversion/storage.

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Section: Technological and Methodological Innovationsmentioning

confidence: 99%

Imaging Beam‐Sensitive Materials by Electron Microscopy

et al. 2020

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“…The interface energy values measured for the Ni‐YSZ(001) interfaces are higher than the 1.8 ± 0.1 J/m 2 and 2.0 ± 0.1 J/m 2 measured for the solid‐solid Ni(111)‐YSZ(111) cube‐on‐cube and twinned ORs, respectively . The difference in energies between the Ni(111)‐YSZ(001) and the Ni(111)‐YSZ(111) interfaces may originate in the possible change in the details of the atomic bonding at the interface (i.e., density and directions), and from the different stabilities of the YSZ surface planes. This issue is reflected in the different surface energies calculated for (111) and (001)YSZ by Lallet et al .…”

Section: Discussionmentioning

confidence: 78%

Ni‐YSZ(001) solid‐solid interfacial energy and orientation relationships

Nahor

Kaplan

2018

J Am Ceram Soc

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Equilibrated Ni particles were produced via solid-state dewetting of continuous Ni films deposited on the (001) surface of yttrium stabilized zirconia (YSZ). The solid-solid interface energy of the equilibrated Ni(111)-YSZ(001) interface was determined using Winterbottom analysis. Two low-index orientation relationships (ORs) were found using the selected area electron diffraction patterns in transmission electron microscopy: Ni½1 10ð111Þ jj YSZ ½100ð002Þ (OR 1 ) and Ni½1 10ð111Þ jj YSZ ½110ð002Þ (OR 2 ). However, many particles were found to deviate from these low-index ORs while maintaining the out-of-plane orientation, Nið111Þ jj YSZð002Þ. The interface energy was measured to be 2.5 ± 0.1 J/m 2 regardless of the in-plane orientation. The orientation distribution was determined using electron backscattered diffraction for Ni particles on both (111) and (001) YSZ substrates and was found to correlate well with the interface energies measured in a previous study for the interface and in the present study for the Ni-YSZ(001) interface.

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“…The reduction and difference of atomic density of Mo atoms in the dislocation cores in all LAGBs might be due to the interaction between surface effect and uneven spatial stress in the atomically thin sample. Integrated differential phase contrast (iDPC), − a newly emerging technology, which shows a contrast that is roughly proportional to Z but can realize a high signal-to-noise ratio for light elements, was further used to image the carbon atoms in Mo 2 C lattice and GBs. It is clearly seen that the carbon atoms are located in the center of the 6 rings of Mo sublattice along the projective direction in Mo 2 C lattice (Figure f), consistent with our previous observations by bright-field STEM .…”

Section: Lagbs Of 2d Mo2c Crystalsmentioning

confidence: 99%

Grain Boundaries and Tilt-Angle-Dependent Transport Properties of a 2D Mo₂C Superconductor

Liu

Wang

et al. 2019

Nano Lett.

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The grain boundaries (GBs) of graphene and molybdenum disulfide have been extensively demonstrated to have a strong influence on electronic, thermal, optical, and mechanical properties. 2D transition-metal carbides (TMCs), known as MXenes, are a rapidly growing new family of 2D materials with many fascinating properties and promising applications. However, the GB structure of 2D TMCs and the influence of GB on their properties remain unknown. Here, we used aberration-corrected scanning transmission electron microscopy combined with electrical measurements to study the GB characteristic of highly crystalline 2D Mo2C superconductor, a newly emerging member of the 2D TMC family. The 2D Mo2C superconductor shows a unique tilt-angle-dependent GB structure and electronic transport properties. Different from the reported 2D materials, the GB of 2D Mo2C shows a peculiar dislocation configuration or sawtooth pattern depending on the tilt angle. More importantly, we found two new periodic GBs with different periodic structures and crystallographic orientations. Electrical measurements on individual GBs show that GB structure strongly affects the transport properties. In the normal state, an increasingly stronger electron localization behavior is observed at the GB region with increasing tilt angle. In the superconducting state, the magnitude of the critical current across the GBs is dramatically reduced, associated with local suppression of superconductivity at GBs. These findings provide new understandings on the GB structure of 2D TMCs and the influence of GB on 2D superconductivity, which would be helpful for tailoring the properties of 2D TMCs through GB engineering.

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Discerning interface atomistic structure by phase contrast in STEM: The equilibrated Ni-YSZ interface

Cited by 15 publications

References 28 publications

Imaging Beam‐Sensitive Materials by Electron Microscopy

Imaging Beam‐Sensitive Materials by Electron Microscopy

Ni‐YSZ(001) solid‐solid interfacial energy and orientation relationships

Grain Boundaries and Tilt-Angle-Dependent Transport Properties of a 2D Mo₂C Superconductor

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Discerning interface atomistic structure by phase contrast in STEM: The equilibrated Ni-YSZ interface

Cited by 15 publications

References 28 publications

Imaging Beam‐Sensitive Materials by Electron Microscopy

Imaging Beam‐Sensitive Materials by Electron Microscopy

Ni‐YSZ(001) solid‐solid interfacial energy and orientation relationships

Grain Boundaries and Tilt-Angle-Dependent Transport Properties of a 2D Mo2C Superconductor

Contact Info

Product

Resources

About

Grain Boundaries and Tilt-Angle-Dependent Transport Properties of a 2D Mo₂C Superconductor