Spectroscopic electron tomography

Möbus, Günter; Doole, R. C.; Inkson, Beverley J.

doi:10.1016/s0304-3991(03)00106-2

Cited by 176 publications

(131 citation statements)

References 24 publications

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“…33 In this study, the Pt atomic columns were clearly observed and the Fe Kagomé layer (3/4 monolayer) and the 1/4 monolayer were also 34 Recently, a resolution of 2.4 Å was obtained for Au single crystalline NP 35 and Pt nanodecahedra 36 with twin boundaries. Some advanced algorithms, such as the Compressive Sensing algorithm, were utilized to achieve better resolution for Au nanorods (NRs).…”

Section: Synthetic Methodologies Of Nhssmentioning

confidence: 51%

Rational synthesis and the structure-property relationships of nanoheterostructures: a combinative study of experiments and theory

Zhou

Wang

2015

NPG Asia Mater

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Nanoheterostructures (NHSs) that combine various nanomaterials into one entity have received an extensive amount of attention in current research. The enhanced performance of the NHSs over their individual constituents have arisen from their unique electronic structure. To rationally synthesize NHSs, two issues need to be addressed. The first issue that should be explored is the mechanism by which the disparate components are integrated into the main structure. The second issue is the relationship between the NHS and its corresponding properties. In this review article, we will focus on these two issues from the perspectives of both experimental and theoretical methodologies.

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Section: Synthetic Methodologies Of Nhssmentioning

confidence: 51%

Rational synthesis and the structure-property relationships of nanoheterostructures: a combinative study of experiments and theory

Zhou

Wang

2015

NPG Asia Mater

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“…With the advent of high angle annular dark field (HAADF) STEM tomography for the three dimensional imaging of crystalline materials 1 , energy dispersive X-ray tomography was also proposed as a method to allow the determination of elemental distributions in three dimensions 2 . However, early studies were limited due to the design of X-ray detectors within the transmission electron microscope.…”

Section: Introductionmentioning

confidence: 99%

Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles

Slater

Lewis

Haigh

2016

JoVE

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Energy dispersive X-ray spectroscopy within the scanning transmission electron microscope (STEM) provides accurate elemental analysis with high spatial resolution, and is even capable of providing atomically resolved elemental maps. In this technique, a highly focused electron beam is incident upon a thin sample and the energy of emitted X-rays is measured in order to determine the atomic species of material within the beam path. This elementally sensitive spectroscopy technique can be extended to three dimensional tomographic imaging by acquiring multiple spectrum images with the sample tilted along an axis perpendicular to the electron beam direction.Elemental distributions within single nanoparticles are often important for determining their optical, catalytic and magnetic properties. Techniques such as X-ray tomography and slice and view energy dispersive X-ray mapping in the scanning electron microscope provide elementally sensitive three dimensional imaging but are typically limited to spatial resolutions of > 20 nm. Atom probe tomography provides near atomic resolution but preparing nanoparticle samples for atom probe analysis is often challenging. Thus, elementally sensitive techniques applied within the scanning transmission electron microscope are uniquely placed to study elemental distributions within nanoparticles of dimensions 10-100 nm.Here, energy dispersive X-ray (EDX) spectroscopy within the STEM is applied to investigate the distribution of elements in single AgAu nanoparticles. The surface segregation of both Ag and Au, at different nanoparticle compositions, has been observed.

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“…The acquisition time for a tomographic data set may be reduced and/or enables the use of more sophisticated imaging and spectroscopy techniques, which generally need a longer acquisition per pixel, but lead to remarkably rich data sets. One area that will grow rapidly is the 3D mapping of composition, especially via STEM-EDX spectrumimaging, building on early work [4]. Although EELS-and EFTEM-based tomography are possible [4][5][6], the introduction of larger, more efficient, x-ray detectors (with ca.…”

mentioning

confidence: 99%

“…One area that will grow rapidly is the 3D mapping of composition, especially via STEM-EDX spectrumimaging, building on early work [4]. Although EELS-and EFTEM-based tomography are possible [4][5][6], the introduction of larger, more efficient, x-ray detectors (with ca. 1sr solid angle) offers the possibility of routine 3D mapping of nanoscale materials.…”

mentioning

confidence: 99%