Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Building bridges between nanowires

Abstract:
Place a layer of gold only a few atoms high on a surface bed of germanium, apply heat to it, and wires will form of themselves. Gold-induced wires is what Mocking prefers to call them. Not 'gold wires', as the wires are not made solely out of gold atoms but also contain germanium. They are no more than a few atoms in height and are separated by no more than 1.6 nanometres (a nanometre is one millionth of a millimetre). Nanotechnologists bridge this small 'gap' with a copper-phthalocyanine molecule. A perfect fit. This molecule was found to be able to rotate if the electrons coursing towards it possess sufficient energy, allowing it to function as a switch. What's more: the copper atom of this molecule floats in the vacuum above the gap - fully detached. This might allow researchers to identify new properties the nanowires may possess.

Building bridges between nanowires

Enschede, Netherlands | Posted on September 21st, 2013

Quantum effects

Mocking also managed to craft new 1D structures with two different metals, iridium and cobalt - obtaining entirely different results. For instance, he was able to prove that quantum effects occur to iridium when heated to room temperature, leading to the wires always being 4.8 nanometres, or a multiple thereof, in length. This astonishing result was published in Nature Communications earlier this year. When cobalt, the third of the metals, was heated, no wires were formed.
Instead, little 'islands' and 'nanocrystals' appeared.

Bottom-up nanoelectronics

Mocking used the semiconductor germanium as substrate for each of the three metals, as it is easy to work with at relatively low temperatures and possesses a suitable crystal structure. Scanning Tunneling Microscopy (STM) is ideally suited to investigate these structures. His research is of fundamental importance, as surprising physical effects are noticeable when deconstructing to the lower dimensions, up to 1D. It also allows for the 'bottom-up' crafting of electronic switches: start with the smallest, self-organising structures, add molecules, and proceed from there. The process is still in its infancy, but may become an alternative to the current 'top-down' approach, which entails removing ever more parts from a larger structure. The gold and iridium-inducted wires may form starting blocks for the process. The cobalt islands, though less suitable to this new type of electronics science, do provide fundamental new insights.

Tijs Mocking (1984, Utrecht, NL) defended his dissertation ‘Properties of 1D metal-induced structures on semiconductor surfaces' on 19 September 2013. His research was conducted within the Physics of Interfaces and Nanomaterials group of the MESA+ Institute for Nanotechnology, led by Professor Harold Zandvliet. A digital copy of the dissertation, or a summary thereof, may be requested.

####

For more information, please click here

Contacts:
Wiebe van der Veen
+31612185692

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 News Press

News and information

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Self-assembling biomaterial forms nanostructure templates for human tissue formation April 27th, 2015

Chip Technology

Two-dimensional semiconductor comes clean April 27th, 2015

Surface matters: Huge reduction of heat conduction observed in flat silicon channels April 23rd, 2015

Drexel materials scientists putting a new spin on computing memory April 22nd, 2015

Printing Silicon on Paper, with Lasers April 21st, 2015

Nanoelectronics

Surface matters: Huge reduction of heat conduction observed in flat silicon channels April 23rd, 2015

New class of 3D-printed aerogels improve energy storage April 22nd, 2015

‘Oxford Instruments Young Nanoscientist India Award 2015’ to Prof. Arindam Ghosh April 20th, 2015

Advances in molecular electronics: Lights on -- molecule on: Researchers from Dresden and Konstanz succeed in light-controlled molecule switching April 20th, 2015

Discoveries

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

More is less in novel electronic material: Adding electrons actually shrinks the system April 27th, 2015

Announcements

New technique for exploring structural dynamics of nanoworld: Developed in a Nobel laureate's laboratory at Caltech, hybrid approach allows ultrafast EM analysis of materials, showing tiny electronic changes in individual atoms within a material on ultrafast time scales April 28th, 2015

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University April 28th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Quantum nanoscience

When mediated by superconductivity, light pushes matter million times more April 28th, 2015

More is less in novel electronic material: Adding electrons actually shrinks the system April 27th, 2015

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

From metal to insulator and back again April 22nd, 2015

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