Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Silver proves its mettle for nanotech applications

Abstract:
The self-assembling properties of the DNA molecule have allowed for the construction of an intriguing range of nanoscale forms. Such nanoarchitectures may eventually find their way into a new generation of microelectronics, semiconductors, biological and chemical sensing devices and a host of biomedical applications.

By Richard Harth

Silver proves its mettle for nanotech applications

Tempe, AZ | Posted on March 19th, 2010

Now Hao Yan and Yan Liu, professors at the Biodesign Institute's Center for Single Molecule Biophysics and their collaborators have introduced a new method to deterministically and precisely position silver nanoparticles onto self-assembling DNA scaffolds.

In their latest research, the group used a long single-strand of DNA, which had been folded into a triangular building platform through a process known as DNA origami. This architectural foundation was then ‘decorated' with one, two or three silver nanoparticles, which self-assembled at pre-determined locations on the DNA nanostructure. The group's experimental results, which appear in the advanced online edition of the journal Angewandte Chemie, demonstrate for the first time the viability of using silver, rather than the gold nanoparticles traditionally applied to DNA-tile or origami based architectures. The study was co-authored by Suchetan Pal, Zhengtao Deng, Baoquan Ding.

One of many applications for DNA scaffolds studded with nanoparticles is to perform precise sensing operations at the molecular scale. Sensitive detection of single molecules with high specificity is of great scientific interest for chemists, biologists, pharmacologists, medical researchers and those involved in environmental areas where trace analysis is required. The detailed study of human genes is but one area where improved single-molecule detection could be of enormous benefit.

In their current effort, the group sought to exploit the properties of the silver nanoparticles to increase the surface plasmon resonance—a vibration of electrons that can give researchers clues regarding the molecular nature of the sample they are studying. "Theoretically, people predicted that a local surface plasmon resonance can be much stronger if you use silver particles compared to gold," said Yan. These locally enhanced areas between nanoparticles are referred to as electrical hot spots.

The group however, had to overcome significant obstacles to the use of silver nanoparticles. Silver tends to be much less stable than gold and can easily oxidize in its normal state. To counter this tendency, Yan and Liu's team attached multiple sulfur atoms to the backbone of the DNA strand used to make the platform for the nanoparticles. Each silver nanoparticle is then firmly held in place by nine sulfur atoms, once it is mounted on the DNA origami shape.

The new study paves the way for creating a more functional DNA architecture. "I believe this work will open doors to implement and study distance-dependent plasmonic interaction between noble nanoparticles at the single particle level," Yan said, adding that the first critical steps to creating hierarchically organized silver nanoparticle structures have now been taken.

####

About Arizona State University Biodesign Institute
The hundreds of researchers at ASU’s Biodesign Institute are driven by a passion to solve some of the world’s most urgent problems affecting human health and the health of our planet:

* Improving health care through more personalized medicine
* Outpacing the global threat of infectious diseases
* Improving our environment through renewable energy and bioremediation

For more information, please click here

Contacts:
Richard Harth
Biodesign Institute Science Writer

Copyright © Arizona State University Biodesign Institute

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

Researchers find the 'key' to quantum network solution May 25th, 2015

One step closer to a single-molecule device: Columbia Engineering researchers first to create a single-molecule diode -- the ultimate in miniaturization for electronic devices -- with potential for real-world applications May 25th, 2015

DNA Double Helix Does Double Duty in Assembling Arrays of Nanoparticles: Synthetic pieces of biological molecule form framework and glue for making nanoparticle clusters and arrays May 25th, 2015

Engineering Phase Changes in Nanoparticle Arrays: Scientists alter attractive and repulsive forces between DNA-linked particles to make dynamic, phase-shifting forms of nanomaterials May 25th, 2015

Possible Futures

Simulations predict flat liquid May 21st, 2015

Nature inspires first artificial molecular pump: Simple design mimics pumping mechanism of life-sustaining proteins found in living cells May 19th, 2015

NNCO and Museum of Science Fiction to Collaborate on Nanotechnology and 3D Printing Panels at Awesome Con May 19th, 2015

Quantum 'gruyères' for spintronics of the future: Topological insulators become a little less 'elusive' May 12th, 2015

Academic/Education

SUNY Poly CNSE and NIOSH Launch Federal Nano Health and Safety Consortium: May 20th, 2015

New JEOL E-Beam Lithography System to Enhance Quantum NanoFab Capabilities May 6th, 2015

FEI Partners With the George Washington University to Equip New Science & Engineering Hall: Suite of new high-performance microscopes will be used for cutting-edge experiments at GW’s new research facility April 29th, 2015

Renishaw Raman systems used to study 2D materials at Boston University, Massachusetts, USA. April 28th, 2015

Chip Technology

One step closer to a single-molecule device: Columbia Engineering researchers first to create a single-molecule diode -- the ultimate in miniaturization for electronic devices -- with potential for real-world applications May 25th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

Sandia researchers first to measure thermoelectric behavior by 'Tinkertoy' materials May 20th, 2015

Defects can 'Hulk-up' materials: Berkeley lab study shows properly managed damage can boost material thermoelectric performances May 20th, 2015

Self Assembly

Engineering Phase Changes in Nanoparticle Arrays: Scientists alter attractive and repulsive forces between DNA-linked particles to make dynamic, phase-shifting forms of nanomaterials May 25th, 2015

Scientists Use Nanoscale Building Blocks and DNA 'Glue' to Shape 3D Superlattices: New approach to designing ordered composite materials for possible energy applications April 23rd, 2015

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

Carnegie Mellon chemists create tiny gold nanoparticles that reflect nature's patterns April 9th, 2015

Nanomedicine

DNA Double Helix Does Double Duty in Assembling Arrays of Nanoparticles: Synthetic pieces of biological molecule form framework and glue for making nanoparticle clusters and arrays May 25th, 2015

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Sensors

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Record high sensitive Graphene Hall sensors May 21st, 2015

Graphene enables tunable microwave antenna May 15th, 2015

Janusz Bryzek Joins MEMS Industry Group to Lead New TSensors Division - New Division will Focus on Accelerating Development of Emerging Ultra-high Volume Sensors Supporting Abundance, mHealth and IoT May 14th, 2015

Nanoelectronics

One step closer to a single-molecule device: Columbia Engineering researchers first to create a single-molecule diode -- the ultimate in miniaturization for electronic devices -- with potential for real-world applications May 25th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Random nanowire configurations increase conductivity over heavily ordered configurations May 16th, 2015

Announcements

Researchers find the 'key' to quantum network solution May 25th, 2015

One step closer to a single-molecule device: Columbia Engineering researchers first to create a single-molecule diode -- the ultimate in miniaturization for electronic devices -- with potential for real-world applications May 25th, 2015

DNA Double Helix Does Double Duty in Assembling Arrays of Nanoparticles: Synthetic pieces of biological molecule form framework and glue for making nanoparticle clusters and arrays May 25th, 2015

Engineering Phase Changes in Nanoparticle Arrays: Scientists alter attractive and repulsive forces between DNA-linked particles to make dynamic, phase-shifting forms of nanomaterials May 25th, 2015

Nanobiotechnology

DNA Double Helix Does Double Duty in Assembling Arrays of Nanoparticles: Synthetic pieces of biological molecule form framework and glue for making nanoparticle clusters and arrays May 25th, 2015

Engineering Phase Changes in Nanoparticle Arrays: Scientists alter attractive and repulsive forces between DNA-linked particles to make dynamic, phase-shifting forms of nanomaterials May 25th, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Supercomputer unlocks secrets of plant cells to pave the way for more resilient crops: IBM partners with University of Melbourne and UQ May 21st, 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