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

Two-dimensional melting of hard spheres experimentally unravelled after 60 years: First definitive experimental evidence of two-dimensional melting of hard spheres April 21st, 2017

National Conference on Nanomaterials, (NCN-2017) April 21st, 2017

NanoMONITOR shares its latest developments concerning the NanoMONITOR Software and the Monitoring stations April 21st, 2017

Nanomechanics, Inc. Unveils New Product at ICMCTF Show April 25th: Nanoindentation experts will launch the new Gemini that measures the interaction of two objects that are sliding across each other not merely making contact April 21st, 2017

Discoveries

Two-dimensional melting of hard spheres experimentally unravelled after 60 years: First definitive experimental evidence of two-dimensional melting of hard spheres April 21st, 2017

Wood filter removes toxic dye from water April 21st, 2017

Rice crew revved for Nanocar Race: Nanocar creator James Tour and team take on international competition with single-molecule marvel April 20th, 2017

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

Materials/Metamaterials

Two-dimensional melting of hard spheres experimentally unravelled after 60 years: First definitive experimental evidence of two-dimensional melting of hard spheres April 21st, 2017

National Conference on Nanomaterials, (NCN-2017) April 21st, 2017

Forge Nano 2017: 1st Quarter Media Update April 20th, 2017

Making Batteries From Waste Glass Bottles: UCR researchers are turning glass bottles into high performance lithium-ion batteries for electric vehicles and personal electronics April 19th, 2017

Announcements

Two-dimensional melting of hard spheres experimentally unravelled after 60 years: First definitive experimental evidence of two-dimensional melting of hard spheres April 21st, 2017

National Conference on Nanomaterials, (NCN-2017) April 21st, 2017

NanoMONITOR shares its latest developments concerning the NanoMONITOR Software and the Monitoring stations April 21st, 2017

Nanomechanics, Inc. Unveils New Product at ICMCTF Show April 25th: Nanoindentation experts will launch the new Gemini that measures the interaction of two objects that are sliding across each other not merely making contact April 21st, 2017

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