Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > DNA as a Future Component of Electronics

Abstract:
Our electronic devices are getting smaller and smaller while doing more and more, so much so that we will soon reach the practical limit of current materials. The electronics of tomorrow require alternatives, such as nanowires made of DNA that can serve as conductive paths and nanotransistors for miniature circuits. In the journal Angewandte Chemie, German scientists have now described a new method for the production of stable, conducting DNA nanowires.

DNA as a Future Component of Electronics

Germany | Posted on July 26th, 2012

DNA is more than a carrier of genetic information; it is also an interesting building material for nanotechnology. This is because of its extraordinary self-organizational properties. DNA is thus often used as a "mold" for the production of nanoscale structures. Its use in the assembly of electronic circuits is hampered by the fact that DNA is a very poor conductor of electricity. One way to get around this is by depositing metal onto the DNA strands.

Scientists at the RWTH Aachen and the University of Munich have now developed a new strategy for the controlled production and metallization of DNA nanostructures. Led by Ulrich Simon, the team used a DNA strand consisting of an immobilization sequence and a metallization sequence. Several such strands are strung together so that the resulting DNA is made of alternating sequences.

The immobilization sequence contains alkyne groups. These allow the DNA to be snapped into place on a silicon wafer coated with azide groups in what is known as a "click" reaction. The other DNA segment has two tasks: it is equipped with functional groups that cause the aggregation of silver particles and can also attach DNA strands to each other.

The DNA strands are stretched, deposited onto the wafers, and attached by the "click" reaction. During the subsequent metallization with silver particles, neighboring strands are simultaneously cross-linked to form multistrands. These have significantly higher structural stability than single strands. In the future, this method could also be used to integrate the DNA strands into programmable DNA architectures to allow for the positioning and binding of complex structures on prestructured substrates.

Deposition of the silver particles does not complete the metallization process. In a second step, which resembles the development of photographs, gold from a solution can be deposited onto the silver particles. Changing the duration of the gold deposition process allows for variation of the diameter of the resulting nanowires.

This new method allowed the scientists to obtain micrometer-long, electrically contactable nanowires that have potential for development into further miniaturized circuits.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Sopping up proteins with thermosponges: Researchers develop novel nanoparticle platform that proves effective in delivering protein-based drugs October 22nd, 2014

Brookhaven Lab Launches Computational Science Initiative:Leveraging computational science expertise and investments across the Laboratory to tackle "big data" challenges October 22nd, 2014

Bipolar Disorder Discovery at the Nano Level: Tiny structures found in brain synapses help scientists better understand disorder October 22nd, 2014

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Chip Technology

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

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

Nanoelectronics

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

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

Discoveries

Sopping up proteins with thermosponges: Researchers develop novel nanoparticle platform that proves effective in delivering protein-based drugs October 22nd, 2014

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Announcements

NanoTechnology for Defense (NT4D) October 22nd, 2014

Mechanism behind nature's sparkles revealed October 22nd, 2014

TARA Biosystems and Harris & Harris Group Form Company to Improve Safety and Efficacy of New Therapies October 22nd, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Nanobiotechnology

Mechanism behind nature's sparkles revealed October 22nd, 2014

‘Designer’ nanodevice could improve treatment options for cancer sufferers October 22nd, 2014

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

Scientists Map Key Moment in Assembly of DNA-Splitting Molecular Machine: Crucial steps and surprising structures revealed in the genesis of the enzyme that divides the DNA double helix during cell replication October 15th, 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