Nanoparticle shape and configuration analysis by transmission electron tomography

Tomographic reconstruction by transmission electron microscopy is used to reveal three-dimensional nanoparticle shapes and the stacking configurations of nanoparticle ensembles. Reconstructions are generated from bright-field image tilt series, with a sample tilt range up to ± 70°, using single or d...

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Bibliographic Details
Published in:Journal of microscopy (Oxford) 2008-06, Vol.230 (3), p.382-387
Main Authors: AHRENKIEL, S.P, YU, P.R, MURPHY, J.E, NEDELJKOVIĆ, J.M, DONOHOE, B.S
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
image analysis
Image Processing, Computer-Assisted
Imaging
MATERIALS SCIENCE
microscopy
Microscopy, Electron, Transmission - instrumentation
Microscopy, Electron, Transmission - methods
nanoparticles
Nanostructures - chemistry
Nanostructures - ultrastructure
Oxides - chemistry
reconstruction
semiconductors
Titanium - chemistry
tomography
Tomography, X-Ray Computed - methods
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Summary:Tomographic reconstruction by transmission electron microscopy is used to reveal three-dimensional nanoparticle shapes and the stacking configurations of nanoparticle ensembles. Reconstructions are generated from bright-field image tilt series, with a sample tilt range up to ± 70°, using single or dual tilt axes. We demonstrate the feasibility of this technique for the analysis of nanomaterials, using appropriate acquisition conditions. Tomography reveals both cubic and hexagonal close-packing configurations in multi-layered arrays of size-selected In nanospheres. By tomography and phase-contrast lattice imaging, we relate the three-dimensional shape of PbSe octahedral nanoparticles to the underlying crystal structure. We also confirm simple-cubic packing in multi-layers of PbSe nanocubes and see evidence that the particle shapes have cubic symmetry. The shapes of TiO₂ nanorod bundles are shown by tomographic reconstruction to resemble flattened ellipsoids.
ISSN:0022-2720
1365-2818
DOI:10.1111/j.1365-2818.2008.01996.x