Spectroscopic imaging of single atoms within a bulk solid
Spectroscopic imaging of single atoms within a bulk solid
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DOI：
10.1103/physrevlett.92.095502
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发表时间：
2004-03-05
影响因子：
8.6
通讯作者：
Pennycook, SJ
中科院分区：
文献类型：
--
作者：
Varela, M;Findlay, SD;Pennycook, SJ
定位，识别和测量单个原子的电子环境的能力将为材料科学，物理学和纳米技术中的许多问题提供基本见解。我们使用像差校正的扫描透射电子显微镜展示了CaTiO 3内部单个La原子的光谱成像。动力学模拟证实了光谱信息在空间上被限制在散射原子周围。此外，我们展示了如何在晶体内的原子的深度可以估计。
The ability to localize, identify, and measure the electronic environment of individual atoms will provide fundamental insights into many issues in materials science, physics, and nanotechnology. We demonstrate, using an aberration-corrected scanning transmission electron microscope, the spectroscopic imaging of single La atoms inside CaTiO3. Dynamical simulations confirm that the spectroscopic information is spatially confined around the scattering atom. Furthermore, we show how the depth of the atom within the crystal may be estimated.