Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

  • 40-W Light Alters Nanoparticles

Photonics Spectra
Jan 2002
Nanoparticles are finding applications in biological and chemical sensing, but it has been difficult to produce particles of different and nonspherical shapes. A team at Northwestern University in Evanston, Ill., however, has reported a light-induced process that turns silver nanospheres into triangular prisms.

The researchers, who reported the work in the Nov. 30 issue of Science, have discovered that irradiating a sample of 8-nm-diameter spheres with a 40-W fluorescent light turns them into prisms measuring 100 nm on a side and 15 nm thick. Moreover, the reaction causes the particles --which scatter in the blue as spheres -- to scatter in the red, enabling the development of colored probes based on shape as well as on composition and size.

Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!