Progress in ultrahigh energy resolution EELS

Krivanek, Ondrej L.; Dellby, Niklas; Hachtel, Jordan A.; Idrobo, Juan Carlos; Hotz, M.; Plotkin-Swing, Benjamin; Bacon, Neil J.; Bleloch, Andrew; Corbin, G.J.; Hoffman, M.V.; Meyer, Chris; Lovejoy, Tracy C.

doi:10.1016/j.ultramic.2018.12.006

Cited by 130 publications

(98 citation statements)

References 55 publications

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“…In CL, there are energy dissipation processes that occur in the beam-sample interaction volume, where excess carriers are regenerated, and it is the recombination of these carriers that generates each CL photon [49], while in EELS, the energy loss from the inelastic scattering events in the beam-sample volume is directly retrieved from changes in the same beam. This favors EELS not just in terms of spatial resolution accuracy but also in energy resolution [50].…”

Section: Exciting With Electrons and Probing With Photons (Cathodolummentioning

confidence: 99%

Multipolar and bulk modes: fundamentals of single-particle plasmonics through the advances in electron and photon techniques

2020

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Recent developments in the application of plasmonic nanoparticles have showcased the importance of understanding in detail their plasmonic resonances at the single-particle level. These resonances can be excited and probed through various methods, which can be grouped in four categories, depending on whether excitation and detection involve electrons (electron energy loss spectroscopy), photons (e.g., dark-field microscopy), or both (cathodoluminescence and photon-induced near-field electron microscopy). While both photon-based and electron-based methods have made great strides toward deepening our understanding of known plasmonic properties and discovering new ones, they have in general progressed in parallel, without much cross-pollination. This evolution can be primarily attributed to the different theoretical approaches driving these techniques, mainly dictated by the inherent different nature of electrons and photons. The discrepancies that still exist among them have hampered the development of a holistic approach to the characterization of plasmonic materials. In this review therefore, we aim to briefly present those electron-based and photon-based methods fundamental to the study of plasmonic properties at the single-particle level, with an eye to new behaviors involving multipolar, propagating, and bulk modes coexisting in colloidal nanostructures. By exploring the key fundamental discoveries in nanoparticle plasmonics achieved with these techniques, herein we assess how integrating this information could encourage the creation of a unified understanding of the various phenomena occurring in individual nanoparticles, which would benefit the plasmonics and electron microscopy communities alike.

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Section: Exciting With Electrons and Probing With Photons (Cathodolummentioning

confidence: 99%

Multipolar and bulk modes: fundamentals of single-particle plasmonics through the advances in electron and photon techniques

2020

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“…The short wavelength of electron beam enables TEM to achieve an atomic resolution. Recently, the developments of aberration correctors and monochromators provide an exceptionally high spatial resolution (0.0405 nm) and a high energy resolution (4.2 meV) . A combination of aberration‐corrected optics, pixel‐array detector, and full‐field ptychography pushes the spatial resolution further to 0.039 nm on 2D materials .…”

Section: Introductionmentioning

confidence: 99%

In Situ Transmission Electron Microscopy on Energy‐Related Catalysis

Hwang

Chen

Zhou

et al. 2019

Advanced Energy Materials

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Energy‐related catalytic reactions have been extensively investigated in past years in order to efficiently utilize clean and environmentally benign energy sources. In these systems, the catalysts and the catalyst/active medium interfaces play a crucial role in determining their performance. Thus, understanding the physical and chemical properties of catalysts during reactions is of importance to provide fundamental insights for designing the devices. Transmission electron microscopy can provide tremendous information regarding materials' morphology, microstructure, and chemical properties at nanoscales. With in situ electron microscopy, dynamic processes of catalytic reactions in both gas and liquid environments have been investigated in real time. In this paper, the recent research progress of in situ and operando electron microscopy techniques are introduced with the representative works in energy‐related reactions, including electrochemical catalysis in liquid media and heterogeneous catalysis in gas media. The uniqueness of the specific electron microscopy methods and scientific merits of each work are highlighted. Finally, outlooks on emerging research opportunities are discussed.

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“…experimentation, theory calculation and literature survey, with prior knowledge of materials themselves. The most common way to interpret EELS spectrum is to compare it with already verified experimental data (Riedl et al 2006;Lajaunie et al 2015;Krivanek et al 2019). However, it should be very careful because the reference data also could be obtained under different experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Introduction to the standard reference data of electron energy loss spectra and their database: eel.geri.re.kr

et al. 2019

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Electron energy loss spectroscopy (EELS) is an analytical technique that can provide the structural, physical and chemical information of materials. The EELS spectra can be obtained by combining with TEM at sub-nanometer spatial resolution. However, EELS spectral information can't be obtained easily because in order to interpret EELS spectra, we need to refer to and/or compare many reference data with each other. And in addition to that, we should consider the different experimental variables used to produce each data. Therefore, reliable and easily interpretable EELS standard reference data are needed. Our Electron Energy Loss Data Center (EELDC) has been designated as National Standard Electron Energy Loss Data Center No. 34 to develop EELS standard reference (SR) data and to play a role in dissemination and diffusion of the SR data to users. EELDC has developed and collected EEL SR data for the materials required by major industries and has a total of 82 EEL SR data. Also, we have created an online platform that provides a one-stop-place to help users interpret quickly EELS spectra and get various spectral information. In this paper, we introduce EEL SR data, the homepage of EELDC and how to use them.

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Progress in ultrahigh energy resolution EELS

Cited by 130 publications

References 55 publications

Multipolar and bulk modes: fundamentals of single-particle plasmonics through the advances in electron and photon techniques

Multipolar and bulk modes: fundamentals of single-particle plasmonics through the advances in electron and photon techniques

In Situ Transmission Electron Microscopy on Energy‐Related Catalysis

Introduction to the standard reference data of electron energy loss spectra and their database: eel.geri.re.kr

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