Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > Big in small things: Physicists of Kiel University are the first to move an atom inside a crystal and investigate its function

The first to move an atom inside a crystal: Alexander Weismann and Hao Zheng in front of the scanning tunneling microscope
Photo/Copyright: Wimber/CAU
The first to move an atom inside a crystal: Alexander Weismann and Hao Zheng in front of the scanning tunneling microscope

Photo/Copyright: Wimber/CAU

Abstract:
Nanotechnology is a thriving science. Parts for computers for example are becoming smaller and more precise by the minute. One of the most efficient computers would be the so-called quantum computer. Up to now, its existence has been merely a concept that is based on the laws of quantum mechanics. Here, the ability to control the state of single atoms is decisive. For the first time ever, scientists of Kiel University have managed to move single atoms vertically inside a crystal. This is important for the further development of nano structures. Simultaneously, the physicists found a method for measuring a transistor-like behaviour of single atoms. These findings have recently been published in the scientific magazine Nature Communications (January, 3rd, 2014) as well as in the renowned Physical Review Letters.

Big in small things: Physicists of Kiel University are the first to move an atom inside a crystal and investigate its function

Kiel, Germany | Posted on January 28th, 2014

When manufacturing nano structures, the understanding, analysing and handling of materials present major challenges. A widely used and investigated material for piezo-, micro-, and optoelectronic devices is zinc oxide (ZnO). As a semiconductor it is built into light-emitting diodes (LED) and LCD-displays. Also, it is used as nanowires in electrical measurement technology. Some of its properties - such as the conductivity of the pure material - have to date not been understood. A major step towards solving this mystery was recently made by Dr. Hao Zheng, Dr. Alexander Weismann and Professor Richard Berndt of the Institute of Experimental and Applied Physics at Kiel University. While experimenting at the Collaborative Research Center "Magnetoelectric Composites - Future Biomagnetic Interfaces", Zheng was analysing zinc oxide with the scanning tunnelling microscope (STM). This device is able to image crystals on an atomic scale. He discovered circular structures in the otherwise irregular surface. "We found that they are a result of zinc atoms that were incorrectly positioned in the crystal lattice", says Zheng.

Each of the discovered atoms featured two rings - a clear proof that it can donate two electrons. "We studied all scientific literature to find out that no-one had so far proven why zinc oxide is conductive. The logical conclusion was that the reason must lie within the newly found zinc atoms, which are naturally occurring in this material."

Further research led Dr. Zheng to discover that the ring's size could be varied while being exposed to experiments in the scanning tunnelling microscope. He asked for the help of his colleague Weismann, who is an expert for model calculation. "The calculation hinted that the diameter of the ring revealed something about the depth of the atoms below the surface", says Weismann. With this it was clear that Zheng had discovered a way to change the position of an atom by a single atom's width. "This is the first time a single atom is controllably moved within a crystal with atomic precision", Weismann stresses. "This ability will be helpful when designing nano structures in laboratories."

Along with their other findings, the scientists of Kiel University noted a behaviour that was similar to that of transistors. This component, which is used in computers by the million, usually requires three contact electrodes. When working with nano structures such as atoms, which measure only 0.3 nanometers, three electrodes would inevitably cause a short-circuit. "With the help of the STM we have discovered a method that only needs two electrodes, one of which is movable." This also is a major step for the handling of nano structures.

The study was financially supported by the Collaborative Research Center 855 "Magnetoelectric Composites - Future Biomagnetic Interfaces".

####

About Christian-Albrechts-Universitaet zu Kiel
When Duke Christian Albrecht of Holstein-Gottorp decided to found a university in 1665, the Thirty Years' War was over. The State required well-educated young men for service to government, who were to graduate from the new university. 140 students enrolled in the initially established faculties of Theology, Law, Medicine and Philosophy.

The University currently teaches over 24,000 women and men and the range of subjects on offer is spread over eight faculties. In addition to the original faculties, the faculties of Agricultural and Nutritional Science, Mathematics and Natural Sciences, Business, Economics and Social Sciences and, the newest faculty, the Faculty of Engineering are integrated into the university. Where once Max Planck and Heinrich Hertz worked, around 700 academics now pass on their knowledge to students from Germany and across the Globe.

For more information, please click here

Contacts:
Boris Pawlowski


Dr. Alexander Weismann
Kiel University
Institute of Experimental and Applied Physics
Phone: 0431/880-3966


Text:
Ann-Christin Wimber
Redaktionsbüro Alte Schule
www.alte-schule.info

Kiel University
Press, Communication and Marketing
Dr. Boris Pawlowski
text: Ann-Christin Wimber (Redaktionsbüro Alte Schule)
editor: Claudia Eulitz
Address: D-24098 Kiel, phone: +49 (0431) 880-2104
fax: +49 (0431) 880-1355

Copyright © AlphaGalileo

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Full bibliographic information

Related News Press

News and information

New remote-controlled microrobots for medical operations July 23rd, 2016

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

New probe developed for improved high resolution measurement of brain temperature: Improved accuracy could allow researchers to measure brain temperature in times of trauma when small deviations in temperature can lead to additional brain injury July 23rd, 2016

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

New Yale-developed device lengthens the life of quantum information July 22nd, 2016

Imaging

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

Physics

Entanglement: Chaos - Researchers at UCSB blur the line between classical and quantum physics by connecting chaos and entanglement July 14th, 2016

Physicists couple distant nuclear spins using a single electron: For the first time, researchers at the University of Basel have coupled the nuclear spins of distant atoms using just a single electron July 12th, 2016

Bouncing droplets remove contaminants like pogo jumpers: Researchers at Duke University and the University of British Columbia are exploring whether surfaces can shed dirt without being subjected to fragile coatings July 7th, 2016

Researchers determine fundamental limits of invisibility cloaks July 7th, 2016

Display technology/LEDs/SS Lighting/OLEDs

Researchers develop faster, precise silica coating process for quantum dot nanorods July 12th, 2016

Integrated trio of 2-D nanomaterials unlocks graphene electronics applications: Voltage-controlled oscillator developed at UC Riverside could be used in thousands of applications from computers to wearable technologies July 7th, 2016

Chip Technology

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

New Yale-developed device lengthens the life of quantum information July 22nd, 2016

New reaction for the synthesis of nanostructures July 21st, 2016

Research team led by NUS scientists develop plastic flexible magnetic memory device: Novel technique to implant high-performance magnetic memory chip on a flexible plastic surface without compromising performance July 21st, 2016

Quantum Computing

New Yale-developed device lengthens the life of quantum information July 22nd, 2016

RMIT researchers make leap in measuring quantum states July 21st, 2016

Electron 'spin control' of levitated nanodiamonds could bring advances in sensors, quantum information processing July 20th, 2016

Tiny works of art with great potential: New materials for the construction of metal-organic 2-dimensional quasicrystals July 15th, 2016

Discoveries

New remote-controlled microrobots for medical operations July 23rd, 2016

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

Nanoparticle versus cancer: Scientists have created nanoparticles which cure cancer harmlessly July 22nd, 2016

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

Announcements

New remote-controlled microrobots for medical operations July 23rd, 2016

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

New probe developed for improved high resolution measurement of brain temperature: Improved accuracy could allow researchers to measure brain temperature in times of trauma when small deviations in temperature can lead to additional brain injury July 23rd, 2016

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

New remote-controlled microrobots for medical operations July 23rd, 2016

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

New probe developed for improved high resolution measurement of brain temperature: Improved accuracy could allow researchers to measure brain temperature in times of trauma when small deviations in temperature can lead to additional brain injury July 23rd, 2016

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

Tools

New superconducting coil improves MRI performance: UH-led research offers higher resolution, shorter scan time July 23rd, 2016

The birth of quantum holography: Making holograms of single light particles! July 21st, 2016

Nanometrics Announces Upcoming Investor Events July 20th, 2016

A mini-antenna for the data processing of tomorrow: Nature Nanotechnology: Short-wavelength spin waves generated directly for the first time July 20th, 2016

Quantum nanoscience

Quantum drag:University of Iowa physicist says current in one iron magnetic sheet can create quantized spin waves in another, separate sheet July 22nd, 2016

A new spin on reality July 15th, 2016

Physicists couple distant nuclear spins using a single electron: For the first time, researchers at the University of Basel have coupled the nuclear spins of distant atoms using just a single electron July 12th, 2016

Quantum technologies to revolutionize 21st century: Nobel Laureates to discuss impacts at 66th Lindau Meeting July 5th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic