Three-dimensional shapes and distribution of FePd nanoparticles observed by electron tomography using high-angle annular dark-field scanning transmission electron microscopy
Three-dimensional shapes and distribution of FePd nanoparticles observed by electron tomography using high-angle annular dark-field scanning transmission electron microscopy
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高角度环形暗场扫描透射电子显微镜电子断层扫描观察 FePd 纳米颗粒的三维形状和分布
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
T. Konno
中科院分区：
文献类型：
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作者：
Kazuhisa Sato;K. Aoyagi;T. Konno
我们利用高角度环形暗场扫描透射电子显微镜获得的原子序数对比，利用单轴倾斜断层扫描技术，研究了电子束沉积和沉积后退火制备的FePd纳米颗粒的三维形状和分布。通过加权反向投影（WBP）和同步迭代重建技术（SIRT）重建颗粒的大小、形状和位置。我们还通过对倾斜序列原始数据集的简单外推来估计颗粒大小，这被证明是相当强大的。将这两种算法的重建结果与外推法和独立报道的电子全息法的结果进行了定量比较。结果表明，WBP法重建的强度图中含有少量SIRT法所不存在的点状伪影，且WBP法得到的颗粒表面比SIRT法得到的颗粒表面粗糙。我们的恶魔……
We have studied three-dimensional shapes and distribution of FePd nanoparticles, prepared by electron beam deposition and postdeposition annealing, by means of single-axis tilt tomography using atomic number contrasts obtained by high-angle annular dark-field scanning transmission electron microscopy. Particle size, shape, and locations were reconstructed by weighted backprojection (WBP), as well as by simultaneous iterative reconstruction technique (SIRT). We have also estimated the particle size by simple extrapolation of tilt-series original data sets, which proved to be quite powerful. The results of the two algorithms for reconstruction have been compared quantitatively with those obtained by the extrapolation method and those independently reported by electron holography. It was found that the reconstructed intensity map by WBP contains a small amount of dotlike artifacts, which do not exist in the results by SIRT, and that the particle surface obtained by WBP is rougher than that by SIRT. We demons...
DOI：
10.1002/jemt.1060090405
发表时间：
1988-08-01
期刊：
JOURNAL OF ELECTRON MICROSCOPY TECHNIQUE
影响因子：
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作者：
RADERMACHER, M
通讯作者：
RADERMACHER, M