Inside Front Cover: Directed Self-Assembly of Gradient Concentric Carbon Nanotube Rings (Adv. Funct. Mater. 14/2008)



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Gradient concentric rings of multiwalled carbon nanotubes (MWNTs) with controlled density over very large areas were achieved by directed self-assembly of the MWNT water solution using a polymeric ring template that was produced by controlled “stick-slip” motions of the contact line in a confined geometry consisting of a sphere on a flat substrate (i.e., sphere-on-flat geometry), as reported by Zhiqun Lin and coworkers on page 2114. The spacing, width, and height of MWNT rings can be finely tailored by using different casting methods. This facile technique opens up a new avenue for high-throughput patterning of microscopic carbon nanotube rings over large area without the need for lithography or an external field.