This research illustrates the rapid progress that is currently being made by real-time nano-microscopy. Within 5 years this research area should be able to take the step from the laboratory to realistic conditions, and this will open up a wealth of possibilities for industry and the medical world.
In this research project, which was conducted by Delft University of Technology's Kavli Institute of Nanoscience, a small group of gold atoms were placed on a gold surface. The Delft researchers then used a High Resolution Electron Microscope (HREM) to show in real-time how this group of atoms collectively sank into the underlying layer of atoms (see the short film at http://virtuallab.nano.tudelft.nl/movies/audis/) and then became arranged in the shape of a surface dislocation (which is an extra row of atoms that is 'squeezed' between the other rows of atoms). At a later stage, the dislocation disappears, as if a string of beads has been pulled away lengthwise. According to Professor Henny Zandbergen, this is the first time that such a phenomenon has been observed in real-time. This was possible due to the progress that has been made in recent years in image-forming techniques and the processing of the data.
Atomic calculations validated and certified the observation mechanism: for this, Delft University of Technology worked in close cooperation with Princeton University (USA). The research results were published in Physical Review Letters. According to Professor Zandbergen, the observable manner in which the atoms arranged themselves in the underlying layer and the movement of the dislocation (see film) is, in principle, an attractive way of transporting materials from the upper layer to the underlying layer and also within the underlying layer. Normally - and as comprehensively detailed in scientific literature - before an atom can 'hop' from one layer to the underlying layer, certain energy barriers exist. But such barriers do not exist with this manner of transport. The findings of this TU Delft research project clearly indicate that when people are modelling the (industrial) production of thin layers, they must also consider this type of collective processes.
Zandbergen's research is a typical example of the rapid progress currently being made by nano-microscopy, or nano-imaging. Nano-microscopy – the observation of individual atoms or molecules - is becoming increasingly more accurate and faster. It is now possible to observe the movements of atoms in real-time, and this allows the position of the atoms to be determined with great precision (approximately 0.01 nm). So far, this has primarily been observed under laboratory conditions. But soon live nano-imaging will take the next step to realistic and industrial conditions: real-life, real-time nano-imaging.
This will open up a wealth of possibilities for all kinds of medical and industrial applications, especially for those that involve a combination of various nano-imaging technologies and conventional optical microscopy. This will allow information about the different length scales to be combined. It will then be possible to follow the biological processes very realistically, and this will also provide many excellent opportunities for industry. One example is catalysis research. Real-life, real-time nano-imaging allows for closer observation of the catalysis processes, with the logical consequences of this being better catalysts and more efficient chemical processes. In the Netherlands, Delft University of Technology, Leiden University and the microscope manufacturing company FEI, are conducting joint research in nano-microscopy.
Frank Nuijens | EurekAlert!
NASA detects solar flare pulses at Sun and Earth
17.11.2017 | NASA/Goddard Space Flight Center
Pluto's hydrocarbon haze keeps dwarf planet colder than expected
16.11.2017 | University of California - Santa Cruz
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses