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Direct imaging of hydrogen-atom columns in a crystal by annular bright-field electron microscopy

Overview of attention for article published in Nature Materials, February 2011
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  • Good Attention Score compared to outputs of the same age (66th percentile)

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1 Wikipedia page


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287 Mendeley
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Direct imaging of hydrogen-atom columns in a crystal by annular bright-field electron microscopy
Published in
Nature Materials, February 2011
DOI 10.1038/nmat2957
Pubmed ID

Ryo Ishikawa, Eiji Okunishi, Hidetaka Sawada, Yukihito Kondo, Fumio Hosokawa, Eiji Abe


Enhancing the imaging power of microscopy to identify all chemical types of atom, from low- to high-atomic-number elements,would significantly contribute for a direct determination of material structures. Electron microscopes have successfully provided images of heavy-atom positions, particularly by the annular dark-field method, but detection of light atoms was difficult owing to their weak scattering power. Recent developments of aberration-correction electron optics have significantly advanced the microscope performance, enabling identification of individual light atoms such as oxygen, nitrogen, carbon, boron and lithium. However, the lightest hydrogen atom has not yet been observed directly, except in the specific condition of hydrogen adatoms on a graphene membrane. Here we show the first direct imaging of the hydrogen atom in a crystalline solid YH(2), based on a classic 'hollow-cone' illumination theory combined with state-of-the-art scanning transmission electronmicroscopy. The optimized hollow-cone condition derived from the aberration-corrected microscope parameters confirms that the information transfer can be extended to 22.5 nm(-1), which corresponds to a spatial resolution of about 44.4 pm. These experimental conditions can be readily realized with the annular bright-field imaging in scanning transmission electron microscopy according to reciprocity, revealing successfully the hydrogen-atom columns as dark dots, as anticipated from phase contrast of a weak-phase object.

Mendeley readers

The data shown below were compiled from readership statistics for 287 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Japan 7 2%
United States 4 1%
Germany 3 1%
United Kingdom 2 <1%
India 2 <1%
Belgium 2 <1%
Canada 1 <1%
Norway 1 <1%
Spain 1 <1%
Other 2 <1%
Unknown 262 91%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 87 30%
Researcher 65 23%
Student > Master 24 8%
Professor > Associate Professor 18 6%
Student > Postgraduate 18 6%
Other 56 20%
Unknown 19 7%
Readers by discipline Count As %
Materials Science 130 45%
Physics and Astronomy 62 22%
Chemistry 29 10%
Engineering 18 6%
Biochemistry, Genetics and Molecular Biology 3 1%
Other 14 5%
Unknown 31 11%

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 February 2011.
All research outputs
of 12,518,737 outputs
Outputs from Nature Materials
of 2,728 outputs
Outputs of similar age
of 309,620 outputs
Outputs of similar age from Nature Materials
of 88 outputs
Altmetric has tracked 12,518,737 research outputs across all sources so far. This one is in the 49th percentile – i.e., 49% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,728 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 26.6. This one is in the 17th percentile – i.e., 17% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 309,620 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 66% of its contemporaries.
We're also able to compare this research output to 88 others from the same source and published within six weeks on either side of this one. This one is in the 18th percentile – i.e., 18% of its contemporaries scored the same or lower than it.