Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

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

Radiation-guided nanoparticles zero in on metastatic cancer July 1st, 2016

Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template July 1st, 2016

No need in supercomputers: Russian scientists suggest a PC to solve complex problems tens of times faster than with massive supercomputers June 30th, 2016

Surprising qualities of insulator ring surfaces: Surface phenomena in ring-shaped topological insulators are just as controllable as those in spheres made of the same material June 30th, 2016

Imaging

How cancer cells spread and squeeze through tiny blood vessels (video) June 30th, 2016

Oxford Instruments and Dresden High Magnetic Field Laboratory collaborate to develop HTS magnet technology components for high field superconducting magnet systems June 29th, 2016

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

FEI Launches Helios G4 DualBeam Series for Materials Science: The Helios G4 DualBeam Series features new capabilities to enable scientists and engineers to answer the most demanding and challenging scientific questions June 27th, 2016

Discoveries

Radiation-guided nanoparticles zero in on metastatic cancer July 1st, 2016

Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template July 1st, 2016

No need in supercomputers: Russian scientists suggest a PC to solve complex problems tens of times faster than with massive supercomputers June 30th, 2016

Surprising qualities of insulator ring surfaces: Surface phenomena in ring-shaped topological insulators are just as controllable as those in spheres made of the same material June 30th, 2016

Announcements

Radiation-guided nanoparticles zero in on metastatic cancer July 1st, 2016

Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template July 1st, 2016

No need in supercomputers: Russian scientists suggest a PC to solve complex problems tens of times faster than with massive supercomputers June 30th, 2016

Surprising qualities of insulator ring surfaces: Surface phenomena in ring-shaped topological insulators are just as controllable as those in spheres made of the same material June 30th, 2016

Tools

How cancer cells spread and squeeze through tiny blood vessels (video) June 30th, 2016

Oxford Instruments and Dresden High Magnetic Field Laboratory collaborate to develop HTS magnet technology components for high field superconducting magnet systems June 29th, 2016

Texas A&M Chemist Says Trapped Electrons To Blame For Lack Of Battery Efficiency: Forget mousetraps — today’s scientists will get the cheese if they manage to build a better battery June 28th, 2016

FEI Launches Helios G4 DualBeam Series for Materials Science: The Helios G4 DualBeam Series features new capabilities to enable scientists and engineers to answer the most demanding and challenging scientific questions June 27th, 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