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

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

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

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

Discoveries

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

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

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

Materials/Metamaterials

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

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

Individual impurity atoms detectable in graphene April 18th, 2018

Psst! A whispering gallery for light boosts solar cells April 14th, 2018

Announcements

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

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

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