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News & Views |
Illuminating interlayer interactions
A synchrotron X-ray diffraction experiment demonstrates an unexpected accumulation of electron density in the interlayer region of TiS2, and provides a benchmark for theoretical models of weak interlayer bonding.
- Xiaohui Qiu
- & Wei Ji
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Article |
Crystal symmetry breaking and vacancies in colloidal lead chalcogenide quantum dots
X-ray scattering and density functional theory calculations reveal that ligand-induced tensile stress can distort the rock-salt structure of small PbS and PbSe colloidal quantum dots, creating a Pb-deficient core surrounded by a Pb-enriched shell.
- Federica Bertolotti
- , Dmitry N. Dirin
- & Norberto Masciocchi
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Commentary |
The hidden structure of liquids
From its earliest days, crystallography has been viewed as a means to probe order in matter. J. D. Bernal's work on the structure of water reframed it as a means of examining the extent to which matter can be regarded as orderly.
- Philip Ball
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Commentary |
Crystallography with powders
Over the course of its long history, powder diffraction has provided countless insights into the properties of materials. It will continue to do so in the future, but with an emphasis on elucidating how materials respond to external stimuli.
- Anthony K. Cheetham
- & Andrew L. Goodwin
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News & Views |
A coherent look at stress
Molecular ligands are widely used to functionalize gold nanoparticles, but their influence on the particle structure has been difficult to probe. Coherent X-ray diffraction has now reached sufficient sensitivity to resolve adsorption-induced near-surface stress in a single nanocrystal.
- Frank Schreiber