Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Manufacturing/Packaging

Nanowires self-assemble from individual particles

Posted: 30 Jul 2002 ?? ?Print Version ?Bookmark and Share

Keywords:oklahoma state university? hahn-meiter-institut? luminescent crystalline CdTe nanowires? nanoparticles? semiconductor colloids?

Researchers from Oklahoma State University in the U.S. and the Hahn-Meiter-Institut in Germany have developed a method to spontaneously self-assemble luminescent crystalline CdTe nanowires from individual nanoparticles.

Growing the nanowires is a seven-day long process. They form not through point-to-point-initiated vectorial growth but by the recrystallization of multiple nanoparticles in a linear aggregate that fuses gradually into one crystal.

The nanowires have high aspect ratios, diameter uniformity and optical activity. The researchers claim that the quality and optical activity of the nanowires either exceed or is comparable to other one-dimensional species produced by more laborious processes.

Exhibiting luminescent quantum yields as high as 29 percent for green, 16.2 percent for yellow, 6 percent for orange, and 2.3 percent for red, the high luminosity of the CdTe nanowires is attributed to their highly ordered crystal structure.

The researchers say the emission wavelength of the nanowire luminescence can be tuned by sizing the original nanoparticles accordingly.

The team believes its method provides a simple technique for the production of 1D semiconductor colloids for processing into quantum-confined superstructures, materials and parts.

?Joanne Aslett

EE Times

Article Comments - Nanowires self-assemble from individ...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top