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Posted: February 25, 2007
Rings of single-walled carbon nanotubes
(Nanowerk News) The assembly and manipulation of nanoscale building blocks are among the most important scientific challenges in nanoscience because they not only afford a potential route to the fabrication of large-scale integrated nanoscale devices but also provide a better understanding of the issues that govern self-organization in many classes of materials.
(Image: American Chemical Society)
A group of researchers at the Institute for Nanotechnology at Northwestern University have recently developed a directed assembly approach for positioning and shaping single-wall carbon nanotubes (SWNTs) into rationally designed structures based upon their interaction with nanopatterned monolayer templates.
Here the SWNTs are assembled along the boundary between hydrophilic and hydrophobic molecule-based features that are deposited on a gold substrate using dip-pen nanolithography. allowing one to manipulate and assemble the SWNTs on the micrometer to sub-100-nm length scales.
Attempts to produce smaller ring structures were not successful, said the researchers.