Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > News > Taking It One Particle at a Time: Two new characterization platforms reveal that there’s more than one way to size up a nanoparticle.

September 23rd, 2010

Taking It One Particle at a Time: Two new characterization platforms reveal that there’s more than one way to size up a nanoparticle.

Abstract:
Once upon a time, when particles were measured in micrometers and an optical microscope could do the heavy lifting, the size and distribution of particles in a solution were discovered through the strength of a researcher's eyesight.

To see the truly small particles, however, we needed to invent less direct solutions. After the invention of the laser, researchers determined that Rayleigh scattering could accomplish this task. As long as a particle is relatively small when compared to a given wavelength of light, it will scatter light in all directions. If it's highly-collimated light—a laser—it can be measured accurately, and the particle characteristics can be determined by watching how the intensity of reflect light changes over time. It's guaranteed to change, too, because all such small molecules are constantly moving about in Brownian motion.

This method, dynamic light scattering (DLS), has become the gold standard for characterization of very small particles since its invention not long after the laser. It is not, of course, the only way to analyze particles. Attenuators, sieves, filters, and centrifuges are all employed for larger particle sizes. But for analyzing samples containing broad distributions of species of widely differing molecular masses (such as proteins and aggregates), DLS is reliably the cost-effective choice.

Source:
rdmag.com

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Leti Presents Advances in Propagation Modeling and Antenna Design for mmWave Spectrum: Paper Is One of 15 that Leti Presented at European Conference on Antennas and Propagation March 19-24 March 23rd, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Imaging

Caught on camera -- chemical reactions 'filmed' at the single-molecule level March 22nd, 2017

Next-gen steel under the microscope March 18th, 2017

Novel nozzle saves crystals: Double flow concept widens spectrum for protein crystallography March 17th, 2017

JPK’s NanoWizard® AFM systems are used at the University of Sheffield to understand soft matter and biological systems at the molecular scale March 7th, 2017

Discoveries

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Artificial photosynthesis steps into the light: Rice University lab turns transition metals into practical catalyst for solar, other applications March 23rd, 2017

Announcements

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Promising results obtained with a new electrocatalyst that reduces the need for platinum: Researchers from Aalto University have succeeded in manufacturing electrocatalysts used for storing electric energy with one-hundredth of the amount of platinum that is usually needed March 24th, 2017

Rice U. refines filters for greener natural gas: New study defines best materials for carbon capture, methane selectivity March 23rd, 2017

Artificial photosynthesis steps into the light: Rice University lab turns transition metals into practical catalyst for solar, other applications March 23rd, 2017

Tools

Caught on camera -- chemical reactions 'filmed' at the single-molecule level March 22nd, 2017

CRMGroup in Belgium uses a Deben three point bending stage in the development of new steel & coated steel products for automotive and other industrial applications March 21st, 2017

Next-gen steel under the microscope March 18th, 2017

Novel nozzle saves crystals: Double flow concept widens spectrum for protein crystallography March 17th, 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