Institute for Materials Research (IMR) of Tohoku University, HORIBA Limited, and Tohoku Techno Arch Company, Limited announced on July 19, 2011 that a research group led by associate professor of IMR, Kouichi Hayashi has succeeded in 3D atomic imaging by a time-inverted version of photoelectron holography. Details were published in Physical Review Letters*.
Determination of atomic arrangement in a material will be an important step to understand its properties and to create novel advanced materials. The research group constructed an apparatus for internal-detector electron holography based on a scanning electron microscope (SEM).
Using an energy-dispersive x-ray detector, an electron gun, and a computer-controllable sample stage, a multiple-energy hologram of the atomic arrangement around the Ti atom in SrTiO3 is obtained by recording the characteristic Ti Ká x-ray spectra for different electron beam angles and wavelengths.
A real-space image was obtained by using a fitting-based reconstruction algorithm SPEA-MEM. 3D atomic images of the elements Sr, Ti, and O in SrTiO3 were clearly visualized. Broadening of O-atom image is observed to show O-atom fluctuation, suggesting the ability of the present method for providing advanced information on the atomic structure analysis.
*Akio Uesaka, Kouichi Hayashi, Tomohiro Matsushita, and Shigetoshi Arai, "3D Atomic Imaging by Internal-Detector Electron Holography", Physical Review Letters, Vol. 107, No. 3, p. 045502 (2011) [4 pages]. Doi: 10,113/PhysRevLett.107.045502; published 19 July 2011.
This article first appeared in the August 2011 issue of Nanotech Japan Bulletin
Mikiko Tanifuji | Research asia research news
Think laterally to sidestep production problems
17.10.2017 | King Abdullah University of Science & Technology (KAUST)
Spin current detection in quantum materials unlocks potential for alternative electronics
16.10.2017 | DOE/Oak Ridge National Laboratory
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
18.10.2017 | Health and Medicine
18.10.2017 | Life Sciences
17.10.2017 | Life Sciences