Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

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

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Imaging

New Grand ARM Transmission Electron Microscope Offers Highest Commercially-Available Atomic Resolution of 63 Picometers October 17th, 2014

Nanotronics Imaging Releases nSPEC® 3D, Powerful Microscope That Captures 3D Images at Nanoscale, in Lightning Speed: Company Unveils Design at American Chemical Society 2014 International Elastomer Conference October 14th, 2014

BSA Distinguished Lecture Today, 10/14: 'LCLS: A Stunning New View Through X-ray Laser Eyes' October 14th, 2014

The Körber Foundation congratulates Stefan Hell on winning the 2014 Nobel Prize October 10th, 2014

NIST researchers enabled by AFM-IR to publish first nanoscale IR spectra of individual plasmonic nanostructures October 10th, 2014

Display technology/LEDs/SS Lighting/OLEDs

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

Physics

Solid nanoparticles can deform like a liquid: Unexpected finding shows tiny particles keep their internal crystal structure while flexing like droplets October 12th, 2014

Unconventional photoconduction in an atomically thin semiconductor: New mechanism of photoconduction could lead to next-generation excitonic devices October 9th, 2014

Chip Technology

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

3DXNano™ ESD Carbon Nanotube 3D Printing Filament - optimized for demanding 3D printing applications in the semi-con and electronics industry October 16th, 2014

Quantum Computing

1980s aircraft helps quantum technology take flight October 20th, 2014

Australian teams set new records for silicon quantum computing October 12th, 2014

Ultrafast remote switching of light emission October 2nd, 2014

Quantum environmentalism: Putting a qubit's surroundings to good use October 2nd, 2014

Discoveries

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Announcements

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

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

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Tools

New Grand ARM Transmission Electron Microscope Offers Highest Commercially-Available Atomic Resolution of 63 Picometers October 17th, 2014

Nanodevices for clinical diagnostic with potential for the international market: The development is based on optical principles and provides precision and allows saving vital time for the patient October 15th, 2014

Nanotronics Imaging Releases nSPEC® 3D, Powerful Microscope That Captures 3D Images at Nanoscale, in Lightning Speed: Company Unveils Design at American Chemical Society 2014 International Elastomer Conference October 14th, 2014

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven October 14th, 2014

Quantum nanoscience

NIST quantum probe enhances electric field measurements October 8th, 2014

Quantum environmentalism: Putting a qubit's surroundings to good use October 2nd, 2014

Rice launches Center for Quantum Materials: RCQM will immerse global visitors in cross-disciplinary research September 30th, 2014

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE