Column-by-column compositional mapping by Z-contrast imaging

Molina, S. I.; Sales, D.; Galindo, Pedro L.; Fuster, David; González, Y.; Alén, Benito; González, L.; Varela, M.; Pennycook, Stephen J.

doi:10.1016/j.ultramic.2008.10.008

Cited by 72 publications

(60 citation statements)

References 23 publications

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“…Below, we present experimental results on the epitaxial growth of different cathode film materials based on conventional TEM (including electron diffraction) and aberration-corrected STEM that uses a high-angle annular dark-field (HAADF) mode to image atomic columns of high-Z (atomic number) atoms [56,57]. The intensity of the columns is proportional to Z α (where α is dependent on inner collection angle and detector geometry and approaches a limit of 2), whereas Z should be normalized to the linear density of atoms along a column.…”

Section: Experimental Results From Transmission Electron Microscopy Smentioning

confidence: 99%

Crystallography and Growth of Epitaxial Oxide Films for Fundamental Studies of Cathode Materials Used in Advanced Li-Ion Batteries

Bendersky

Tan²,

Bharathi

et al. 2017

Crystals

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Li-ion battery systems, synthesized as epitaxial thin films, can provide powerful insights into their electrochemical processes. Crystallographic analysis shows that many important cathode oxides have an underlying similarity: their structures can be considered as different ordering schemes of Li and transition metal ions within a pseudo-cubic sublattice of oxygen anions arranged in a face-center cubic (FCC) fashion. This oxygen sublattice is compatible with SrTiO 3 and similar perovskite oxides, thus perovskites can be used as supporting substrates for growing epitaxial cathode films. The predicted epitaxial growth and crystallographic relations were experimentally verified for different oxide films deposited by pulsed laser deposition (PLD) on All results demonstrated the feasibility of epitaxial growth for these materials, with the growth following the predicted cube-on-cube orientation relationship between the cubic and pseudo-cubic oxygen sublattices of a substrate and a film, respectively.

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Section: Experimental Results From Transmission Electron Microscopy Smentioning

confidence: 99%

Crystallography and Growth of Epitaxial Oxide Films for Fundamental Studies of Cathode Materials Used in Advanced Li-Ion Batteries

Bendersky

Tan²,

Bharathi

et al. 2017

Crystals

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“…In relation to the first approach, we have developed a phenomenological method to determine the composition of materials, with atomic column resolution. This method is based on the analysis of integrated intensities of aberration-corrected Z-contrast images [15].…”

Section: Quantitative Z-contrast Imagingmentioning

confidence: 99%

“…We have developed both phenomenological [15] and simulation [16] approaches to determine the composition with atomic column resolution from aberration-corrected high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) images, that can be applied to a wide range of materials problems, ranging from compositionally homogeneous phases to heterogeneous nanostructures including millions of atoms. The strain distribution of nanostructures can be determined from the obtained compositional maps, and compared with strain maps obtained by analysing phase-contrast HRTEM images.…”

Section: Introductionmentioning

confidence: 99%

Exploring semiconductor quantum dots and wires by high resolution electron microscopy

Molina

Galindo

González³

et al. 2010

J. Phys.: Conf. Ser.

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Abstract. We review in this communication our contribution to the structural characterisation of semiconductor quantum dots and wires by high resolution electron microscopy, both in phase-contrast and Z-contrast modes. We show how these techniques contribute to predict the preferential sites of nucleation of these nanostructures, and also determine the compositional distribution in 1D and 0D nanostructures. The results presented here were produced in the framework of the European Network of Excellence entitled "SelfAssembled semiconductor Nanostructures for new Devices in photonics and Electronics (SANDiE)".

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“…Nowadays there are multiple options to interpret HAADF images in quantitative terms. It is possible to study the intensities associated with atomic columns through statistical analysis [4], phenomenological procedures [5] or to compare with simulations [6]. But in the case of the analysis of nanostructures like QDs all of these methodologies are affected by the dependence of the HAADF intensities on the strain fields originating from the nanostructure that alter the intensities [7], making the precise quantification of HAADF images a complicated task.…”

mentioning

confidence: 99%

Determination of Local Chemistry Composition of Low-Dimensional Semiconductor Nanostructures Through the use of High-Resolution HAADF images

et al. 2015

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Column-by-column compositional mapping by Z-contrast imaging

Cited by 72 publications

References 23 publications

Crystallography and Growth of Epitaxial Oxide Films for Fundamental Studies of Cathode Materials Used in Advanced Li-Ion Batteries

Crystallography and Growth of Epitaxial Oxide Films for Fundamental Studies of Cathode Materials Used in Advanced Li-Ion Batteries

Exploring semiconductor quantum dots and wires by high resolution electron microscopy

Determination of Local Chemistry Composition of Low-Dimensional Semiconductor Nanostructures Through the use of High-Resolution HAADF images

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