Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Nanocontrol using Peptides

Abstract:
Small changes can have a big effect; work by US scientists demonstrates how a very small change in molecular structure can have a profound controlling effect on the size of gold nanoparticle superstructures.

Nanocontrol using Peptides

Posted on July 29th, 2011

Scientists know that properties of a nanostructure depend on its size and construction, yet precise control of these two factors is often tricky. Directed self-assembly, using an additive to control how a structure will form, is a favored route as it limits the possible outcomes by preprogramming the synthesis.

Pittsburgh-based researchers led by Nathaniel Rosi have previously altered the structure of a nanoparticle superstructure (closely associated group of nanoparticles) by changing something very small such as a part of the directing molecule. They used a peptide to direct self-assembly of gold nanoparticles by means of intermolecular interactions and found that changes in the structure of a chain attached to the peptide could produce alterations in nanostructure.

Now, the researchers have taken their idea one step further and shown that, by altering a single amino acid in the peptide sequence (12 acids long), they can control the size of the superstructure. They were also able to modify the distribution of the nanoparticles within the superstructure by changing the synthetic procedure so that the gold was added in two batches instead of one.

The researchers believe that their versatile method could be used to make a wide variety of nanoparticle superstructures, some of which could be used as catalysts, capsules, or delivery agents.

This work is part of a showcase of nanoscience in a Special Issue to celebrate the 20th anniversary at Northwestern University, USA, of Chad Mirkin, one of the kings of the nano arena.

####

For more information, please click here

Copyright © John Wiley & Sons

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

Innovation in Nanotechnology is Focus of Symposium: Annual event brings international experts to Northwestern Oct. 6 September 29th, 2016

Cambrios at CEATEC - Japan 2016 September 29th, 2016

Picosun patents ALD nanolaminate to prevent electronics from overheating September 28th, 2016

Leti and Taiwanese Tech Organizations Sponsoring Workshop in Taipei on MEMS, IoT, Smart Lighting Applications, System Reliability & Security September 28th, 2016

Discoveries

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Materials/Metamaterials

Innovation in Nanotechnology is Focus of Symposium: Annual event brings international experts to Northwestern Oct. 6 September 29th, 2016

Cambrios at CEATEC - Japan 2016 September 29th, 2016

Picosun patents ALD nanolaminate to prevent electronics from overheating September 28th, 2016

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Announcements

Innovation in Nanotechnology is Focus of Symposium: Annual event brings international experts to Northwestern Oct. 6 September 29th, 2016

Cambrios at CEATEC - Japan 2016 September 29th, 2016

Picosun patents ALD nanolaminate to prevent electronics from overheating September 28th, 2016

Leti and Taiwanese Tech Organizations Sponsoring Workshop in Taipei on MEMS, IoT, Smart Lighting Applications, System Reliability & Security September 28th, 2016

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







Car Brands
Buy website traffic