Nanoparticle shape and configuration analysis by transmission electron tomography

被引：15

作者：

Ahrenkiel, S. P. ^{[1
]}

Yu, P. R. ^{[1
]}

Murphy, J. E. ^{[1
]}

Nedeljkovic, J. M. ^{[2
]}

Donohoe, B. S. ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

[2] Vinca Inst Nucl Sci, Belgrade 11001, Serbia

来源：

JOURNAL OF MICROSCOPY | 2008年 / 230卷 / 03期

关键词：

imaging; microscopy; nanoparticles; reconstruction; semiconductors; tomography;

D O I：

10.1111/j.1365-2818.2008.01996.x

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

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 degrees, 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.

引用

页码：382 / 387

页数：6

共 23 条

[1] Photoluminescence of anatase and rutile TiO2 particles [J].