scholarly journals Studies of x-ray localization and thickness dependence in atomic-scale elemental mapping by STEM energy-dispersive x-ray spectroscopy using single-frame scanning method

2018 ◽  
Vol 186 ◽  
pp. 23-29 ◽  
Author(s):  
Ping Lu ◽  
Jaime M. Moya ◽  
Renliang Yuan ◽  
Jian Min Zuo
Keyword(s):  
Thickness Dependence ◽  
Atomic Scale ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
Scanning Method ◽  
X Ray ◽  
Single Frame

scholarly journals Fast Atomic-Scale Elemental Mapping of Crystalline Materials by STEM Energy-Dispersive X-Ray Spectroscopy Achieved with Thin Specimens

2017 ◽  
Vol 23 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Ping Lu ◽  
Renliang Yuan ◽  
Jian Min Zuo
Keyword(s):  
Real Space ◽  
Atomic Scale ◽  
Energy Dispersive ◽  
Acquisition Time ◽  
Specimen Thickness ◽  
Elemental Mapping ◽  
Experimental Conditions ◽  
Lattice Vector ◽  
Thin Specimen ◽  
X Ray

AbstractElemental mapping at the atomic-scale by scanning transmission electron microscopy (STEM) using energy-dispersive X-ray spectroscopy (EDS) provides a powerful real-space approach to chemical characterization of crystal structures. However, applications of this powerful technique have been limited by inefficient X-ray emission and collection, which require long acquisition times. Recently, using a lattice-vector translation method, we have shown that rapid atomic-scale elemental mapping using STEM-EDS can be achieved. This method provides atomic-scale elemental maps averaged over crystal areas of ~few 10 nm2with the acquisition time of ~2 s or less. Here we report the details of this method, and, in particular, investigate the experimental conditions necessary for achieving it. It shows, that in addition to usual conditions required for atomic-scale imaging, a thin specimen is essential for the technique to be successful. Phenomenological modeling shows that the localization of X-ray signals to atomic columns is a key reason. The effect of specimen thickness on the signal delocalization is studied by multislice image simulations. The results show that the X-ray localization can be achieved by choosing a thin specimen, and the thickness of less than about 22 nm is preferred for SrTiO3in [001] projection for 200 keV electrons.

scholarly journals Reaching for atomic-scale quantitative energy dispersive X-ray spectroscopy

2021 ◽  
Vol 27 (S1) ◽  
pp. 2602-2603
Author(s):  
Katherine MacArthur ◽  
Andrew Yankovich ◽  
Armand Béché ◽  
Martina Luysberg ◽  
Hamish Brown ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Energy Dispersive ◽  
X Ray

Atomic-scale chemical quantification of oxide interfaces using energy-dispersive X-ray spectroscopy

2013 ◽  
Vol 102 (17) ◽  
pp. 173111 ◽  
Author(s):  
Ping Lu ◽  
Jie Xiong ◽  
Mark Van Benthem ◽  
Quanxi Jia
Keyword(s):  
Atomic Scale ◽  
Energy Dispersive ◽  
Oxide Interfaces ◽  
X Ray ◽  
Chemical Quantification

scholarly journals Multi-scale characterization of glaucophane from Chiavolino (Biella, Italy): implications for international regulations on elongate mineral particles

2021 ◽  
Vol 33 (1) ◽  
pp. 77-112
Author(s):  
Ruggero Vigliaturo ◽  
Sabrina M. Elkassas ◽  
Giancarlo Della Ventura ◽  
Günther J. Redhammer ◽  
Francisco Ruiz-Zepeda ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Environmental Scanning Electron Microscopy ◽  
Atomic Scale ◽  
Energy Dispersive ◽  
Mineral Particle ◽  
X Ray ◽  
Mineral Particles ◽  
Particle Population ◽  
Investigation Methods

Abstract. In this paper, we present the results of a multi-analytical characterization of a glaucophane sample collected in the Piedmont region of northwestern Italy. Investigation methods included optical microscopy, powder X-ray diffraction, Fourier-transform infrared spectroscopy, µ-Raman spectroscopy, Mössbauer spectroscopy, electron probe microanalysis, environmental scanning electron microscopy and energy-dispersive X-ray spectroscopy, and scanning/transmission electron microscopy combined with energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy. In addition to the crystal–chemical characterization of the sample from the mesoscale to the near-atomic scale, we have also conducted an extended study on the morphology and dimensions of the mineral particles. The main finding is that studying the same particle population at different magnifications yields different results for mineral habit, dimensions, and dimensional distributions. As glaucophane may occur as an elongate mineral particle (e.g., asbestiform glaucophane occurrences in California and Nevada), the observed discrepancies therefore need to be considered when assessing potential breathability of such particles, with implications for future regulations on elongate mineral particles. While the sample preparation and particle counting methods are not directly investigated in this work, our findings suggest that different magnifications should be used when characterizing an elongate mineral particle population, irrespective of whether or not it contains asbestiform material. These results further reveal the need for developing improved regulation for elongate mineral particles. We thus propose a simple methodology to merge the datasets collected at different magnifications to provide a more complete description and a better risk evaluation of the studied particle population.

scholarly journals Study of the Painting Methods of Mural Paintings in Ancient Tombs of Goguryeo Using Scanning Electron Microscope

2013 ◽  
Vol 19 (S5) ◽  
pp. 157-161 ◽  
Author(s):  
Kyeongsoon Han ◽  
Sangjin Lee ◽  
Hwasoo Lee
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
The West ◽  
X Ray ◽  
Mural Paintings ◽  
Scanning Electron

AbstractDisputes on the painting methods of Goguryeo murals can mainly be categorized into whether the murals adapted eastern secco or western fresco; however, the murals have their own unique methods as well. There are different viewpoints among experts on interpreting the painting methods. This study involved the creation of research samples to discover the painting methods under dispute and may help discover the methods based on scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDX) studies. Goguryeo murals introduced pseudo-fresco rather than buon fresco methods. Unlike fresco techniques in the West, Goguryeo painters mixed traditional soft binders and adapted typical secco painting techniques for paintings, borders, and corrections after drying. The disputed issues may be resolved by these techniques, and samples may be produced based on the analyzed data. Therefore, many questions can finally be answered through SEM-EDX elemental mapping.

Energy-dispersive X-ray spectroscopy for an atomic-scale quantitative analysis of Pd–Pt core-shell nanoparticles

Microscopy ◽  
2020 ◽  
Vol 69 (1) ◽  
pp. 26-30
Author(s):  
Shin Inamoto ◽  
Yuji Otsuka
Keyword(s):  
Quantitative Analysis ◽  
Shell Thickness ◽  
Dark Field ◽  
Atomic Scale ◽  
Energy Dispersive ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
X Ray ◽  
Scanning Transmission ◽  
Core Shell Nanoparticles

Abstract The properties of core-shell nanoparticles, which are used for many catalytic processes as an alternative to platinum, depend on the size of both the particle and the shell. It is thus necessary to develop a quantitative method to determine the shell thickness. Pd–Pt core-shell particles were analyzed using scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDX). Quantitative EDX line profiles acquired from the core-shell particle were compared to four core-shell models. The results indicate that the thickness of the Pt shell corresponds to two atomic layers. Meanwhile, high-angle annular dark-field STEM images from the same particle were analyzed and compared to simulated images. Again, this experiment demonstrates that the shell thickness was of two atomic layers. Our results indicate that, in small particles, it is possible to use EDX for a precise atomic-scale quantitative analysis.

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