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Nanorods developed in UC Riverside lab could greatly improve visual display of information
Date:3/14/2011

the iron oxide particles that effectively diffracts visible light and displays brilliant colors."

He explained that all the one-dimensional photonic rods within a sample show a single color because the particles arrange themselves with uniform periodicity that is, the interparticle spacing within all the chains is the same, regardless of the length of the individual chains. Further, the photonic chains remain separated from each other in magnetic fields due to the magnetic repulsive force that acts perpendicular to the direction of the magnetic field.

The researchers note that a simple and convenient way to change the periodicity in the rods is to use iron oxide clusters of different sizes. This, they argue, would make it possible to produce photonic rods with diffraction wavelengths across a wide range of spectrum from near ultraviolet to near infrared.

"One major advantage of the new technology is that it hardly requires any energy to change the orientation of the nanorods and achieve brightness or a color," Yin said. "A current drawback, however, is that the interparticle spacing within the chains gets fixed once the silica coating is applied, allowing for no flexibility and only one color to be displayed."

His lab is working now on achieving bistability for the nanorods. If the lab is successful, the nanorods would be capable of diffracting two colors, one at a time.

"This would allow the same device or pixel to display one color for a while and a different color later," said Yin, a Cottrell Scholar.


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Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert  

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