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

All-Nanoparticle Coatings Increase Clarity

Photonics Spectra
Nov 2006
Michael A. Greenwood

Nanoparticle coatings with antireflective, antifogging and self-cleaning properties have been prepared by a team of researchers from MIT in Cambridge, Mass. Using an aqueous-based layer-by-layer deposition technique, the scientists created thin films of nanoparticles on surfaces. The multilayer coatings comprised oppositely charged nanoparticles (positively charged TiO2 particles with an average size of ~7 nm and negatively charged SiO2 particles with an average size of ~7 and ~22 nm) and were applied to glass or silicon substrates.


The image demonstrates the antifogging properties of multilayer-coated glass (left) compared with an untreated glass substrate (right). Reprinted with permission of the American Chemical Society.

Lead researchers Robert E. Cohen and Michael F. Rubner said that, despite decades of study and many breakthroughs, research of films containing oppositely charged nanoparticles without any polyelectrolytes has been more or less neglected.

The results of the current study have a variety of potentially useful applications, including better visibility for motorists. Nanoparticle-based coatings on glass cause the reflective losses in the visible region to be significantly reduced, and transmission levels above 99 percent can be achieved.

The self-cleaning properties of the coatings also have potential applications in photovoltaic cells, vehicle windshields and the windows of high-rise buildings. 

Nano Letters, Sept. 9, 2006, published online, doi:10.1021/nl061776m.

antireflectivecoatingsNanoparticle coatingsnanoparticlesResearch & TechnologyTech Pulse

Terms & Conditions Privacy Policy About Us Contact Us
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2018 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA,

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.