Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Self-aligning DNA wires for application in nanoelectronics

What looks like sand dunes is actually smaller than a single grain of sand. Thanks to electrostatic surface interactions, DNA nanotubes (shown here in red) align along the prefabricated nanopattern on a silicon surface.
What looks like sand dunes is actually smaller than a single grain of sand. Thanks to electrostatic surface interactions, DNA nanotubes (shown here in red) align along the prefabricated nanopattern on a silicon surface.

Abstract:
Since continuous miniaturization in microelectronics is already starting to reach the physical limits, researchers are seeking new methods for device fabrication. One promising candidate is the DNA origami technique in which individual strands of the biomolecule self-assemble into arbitrarily shaped nanostructures. The formation of entire circuits, however, requires the controlled positioning of these DNA structures on a surface - something which previously has only been possible using very elaborate techniques. Now, researchers at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have come up with a simpler strategy which combines DNA origami with self-organized pattern formation. The researchers' method is featured in the scientific journal Nanoscale's current issue (DOI: 10.1039/C3NR04627C)

Self-aligning DNA wires for application in nanoelectronics

Dresden, Germany | Posted on January 30th, 2014

Dr. Adrian Keller of the HZDR Institute of Ion Beam Physics and Materials Research describes the new method: "Its beauty lies with the fact that we're allowing nature to simply run its course as soon as we've created the necessary framework." In the DNA origami technique, the DNA structures self-assemble as long strands of the biomolecule fold into complex, predefined nanoscale shapes by pairing with multiple smaller DNA strands. The physicists used the technique to produce small tubes with lengths of 412 nanometers and diameters of six nanometers. These structures can be used as scaffolds for manufacturing nanoelectronic components like nanowires.

In order to align these nanotubes on the surface, the researchers drew on a principle of self-organization that is actually quite common in nature. Wind may for instance form ordered patterns on a sandy beach. "Similar processes are at work here," explains Keller. "We irradiate the surface onto which we want to place the nanostructures - in our case, the silicon wafers - with ions. This results in the spontaneous appearance of ordered nanopatterns resembling miniature sand dunes. At that point, our job is pretty much done as natural processes are taking over and doing all the work."

Through electrostatic interactions between the charged DNA nanostructures and the charged surface, the nanotubes align themselves in the valleys of the dunes. Says Keller: "This technique works so well that not only do the small tubes follow the wavy patterns, they even replicate occasional pattern defects. Meaning this technique should also allow for production of curved nanocomponents." The maximum degree of alignment the Dresden researchers were able to obtain was at a pattern wavelength of 30 nanometers. "True, we're only looking at a total yield of 70 percent of nanotubes that perfectly follow the pattern," concedes Keller. "But it's still impressive considering the natural process we used."

Because unlike previous approaches, according to Keller, the new technique is quick, cheap, and simple. "Until now, we had to draw on lithographic techniques plus treat the surface with chemicals in order to align the DNA nanostructures. Although this does produce the desired outcome, it nonetheless complicates the processes. Our new technique offers a much simpler alternative." Since aligning the small tubes is based exclusively on electrostatic interaction with the prestructured surface, using this particular method the nanotubes could also be arranged into more complex arrays such as electronic circuits. Keller is convinced that they can be attached to individual transistors, for instance, and connect them electrically: "This way, DNA based nanocomponents could be integrated into technological devices and contribute to further miniaturization."

Developing electronic circuits based on such self-organization principles is the subject of research at the HZDR-coordinated International Helmholtz Research School NanoNet (www.ihrs-nanonet.de). The international Ph.D. program trains junior scientists in molecular electronics as part of DRESDEN-concept - an alliance between the HZDR, the TU Dresden, and several partners from science. The focus of the program is on techniques which functionalize atoms, molecules, and artificial nanostructures to enable information exchange among them and eventually build electronic building blocks like a transistor. The long term vision of this scientific approach is the development of components that spontaneously assemble into electronic circuits.

Publication:

Teshome, B., Facsko, S. & Keller, A. (2014). Topography-controlled alignment of DNA origami nanotubes on nanopatterned surfaces. Nanoscale, 6,1790, DOI: 10.1039/C3NR04627C

####

For more information, please click here

Contacts:
For additional information:

Dr. Adrian Keller
Institute of Ion Beam Physics and Materials Research at HZDR
Ph. +49 351 260-3148


Media contact:

Simon Schmitt
Science Editor
Ph. +49 351 260 - 2452

Copyright © Helmholtz-Zentrum Dresden-Rossendorf

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

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Chip Technology

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

New qubit now works without breaks: A universal design for superconducting qubits has been created April 19th, 2018

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

When superconductivity disappears in the core of a quantum tube: By replacing the electrons with ultra-cold atoms, a group of physicists has created a perfectly clean material, unveiling new states of matter at the quantum level April 16th, 2018

Self Assembly

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

Tiny nanomachine successfully completes test drive: Researchers at the University of Bonn and the research institute Caesar build a one-wheeled vehicle out of DNA rings April 11th, 2018

Liquid crystal molecules form nano rings: Quantized self-assembly enables design of materials with novel properties February 7th, 2018

Particle size matters for porous building blocks: Rice University scientists find porous nanoparticles get tougher under pressure, but not when assembled December 19th, 2017

Nanotubes/Buckyballs/Fullerenes/Nanorods

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Plasmons triggered in nanotube quantum wells: Rice, Tokyo Metropolitan scientists create platform for unique near-infrared devices March 16th, 2018

Big steps toward control of production of tiny building blocks March 9th, 2018

Nanotube fibers in a jiffy: Rice University lab makes short nanotube samples by hand to dramatically cut production time January 11th, 2018

Nanoelectronics

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

New qubit now works without breaks: A universal design for superconducting qubits has been created April 19th, 2018

Non-toxic filamentous virus helps quickly dissipate heat generated by electronic devices April 4th, 2018

Ancient paper art, kirigami, poised to improve smart clothing: New research shows how paper-cutting can make ultra strong, stretchable electronics April 3rd, 2018

Discoveries

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Graphene origami as a mechanically tunable plasmonic structure for infrared detection April 25th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Announcements

The first PE blown films with nanotubes hit the Chinese market April 26th, 2018

Arbe Robotics Selects GLOBALFOUNDRIES for its High-Resolution Imaging Radar to Enable Safety for Autonomous Cars: Arbe Robotics’ proprietary chipset leverages GF’s 22FDX® technology to deliver industry’s first real-time 4D imaging radar for level 4 and 5 autonomous driving April 26th, 2018

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

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

The dispute about the origins of terahertz photoresponse in graphene results in a draw April 26th, 2018

Getting a better look at living cells April 25th, 2018

Graphene origami as a mechanically tunable plasmonic structure for infrared detection April 25th, 2018

Nuclear radiation detecting device could lead to new homeland security tool: New device can detect gamma rays and identify radioactive isotopes April 25th, 2018

Nanobiotechnology

Watching nanomaterials form in 4D: Novel technology allows researchers to see dynamic reactions as they happen at the nanoscale April 26th, 2018

Getting a better look at living cells April 25th, 2018

Biophysics -- lighting up DNA-based nanostructures April 25th, 2018

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project