Reconstruction and visualization of nanoparticle composites by transmission electron tomography

A Bayesian approach to reconstruction and segmentation of tomographic data is outlined and further detailed for the case of absorption tomography. The algorithm allows the quantification of reconstruction errors and segmentation confidence. Calculation results for various experimental settings (number of projections, incident dose, different materials) are shown and discussed.We are pleased to dedicate this paper to the memory of David J. H. Cockayne. HighlightsSimultaneous tomographic reconstruction and segmentation algorithm Fully self-contained Probabilistic error metrics for both reconstructed densities and segmentation on a voxel basis Highlights (for review)Autonomous reconstruction and segmentation of tomographic data We are pleased to dedicate this paper to the memory of David J. H. Cockayne.

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“…Sometimes even the noise is not taken into account (see e.g. [23]). The present calculations are done for a known model configuration.…”

Section: Discussionmentioning

confidence: 99%

Autonomous reconstruction and segmentation of tomographic data

Wollgarten

Habeck

2014

Micron

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“…1b can be used as a virtual tilt series spanning the full 360°of rotation 51 . To reconstruct the crescent's structure we used the tomographic method of filtered back-projection, which forms a reconstructed image by summing partial reconstructions at various angles [52][53][54] (Supplementary Section E). Figure 4a presents the resulting TEM tomographic reconstruction.…”

Section: Three-dimensional Reconstructionmentioning

confidence: 99%

Nanoscale optical tomography with cathodoluminescence spectroscopy

et al. 2015

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Tomography has enabled the characterization of the Earth's interior, visualization of the inner workings of the human brain, and three-dimensional reconstruction of matter at the atomic scale. However, tomographic techniques that rely on optical excitation or detection are generally limited in their resolution by diffraction. Here, we introduce a tomographic technique--cathodoluminescence spectroscopic tomography--to probe optical properties in three dimensions with nanometre-scale spatial and spectral resolution. We first obtain two-dimensional cathodoluminescence maps of a three-dimensional nanostructure at various orientations. We then use the method of filtered back-projection to reconstruct the cathodoluminescence intensity at each wavelength. The resulting tomograms allow us to locate regions of efficient cathodoluminescence in three dimensions across visible and near-infrared wavelengths, with contributions from material luminescence and radiative decay of electromagnetic eigenmodes. The experimental signal can be further correlated with the radiative local density of optical states in particular regions of the reconstruction. We demonstrate how cathodoluminescence tomography can be used to achieve nanoscale three-dimensional visualization of light-matter interactions by reconstructing a three-dimensional metal-dielectric nanoresonator.

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“…However, 360° ET necessitates rod‐shaped specimens with limited projected thickness to facilitate full rotation of the sample under similar imaging conditions. Concerning the preparation of individual nanoparticles, this sample geometry was realized in the past by cutting thin pillars out of embedded or covered nanoparticulate samples using focused ion beam (FIB) milling, or by dispersing particles in solution onto a suited tip . However, these techniques bring along several drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Transfer of Individual Micro‐ and Nanoparticles for High‐Precision 3D Analysis Using 360° Electron Tomography

et al. 2017

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A versatile approach is demonstrated, providing a general routine for an extensive and advanced 3D characterization of individually selected micro‐ and nanoparticles, enabling the combination of complementary and scale‐bridging techniques. Quintessential to the method is the transfer of individual particles onto tailored tips using a conventional scanning electron microscope equipped with a suitable micromanipulator. The method enables a damage‐ and contamination‐free preparation of freestanding particles. This is of significant importance for applications addressing the measurement of structural, physical, and chemical properties of specifically selected particles, such as 360° electron tomography, atom probe tomography, nano X‐ray tomography, or optical near‐field measurements. In this context, the method is demonstrated for 360° electron tomography of micro‐/macroporous zeolite particles with sizes in the micrometer range and mesoporous alpha‐hematite nanoparticles exhibiting sizes of 50–100 nm, including detailed pre‐ and post‐characterization on the nanoscale.

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Reconstruction and visualization of nanoparticle composites by transmission electron tomography

Cited by 16 publications

References 24 publications

Autonomous reconstruction and segmentation of tomographic data

Autonomous reconstruction and segmentation of tomographic data

Nanoscale optical tomography with cathodoluminescence spectroscopy

Transfer of Individual Micro‐ and Nanoparticles for High‐Precision 3D Analysis Using 360° Electron Tomography

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