![](https://webarchive.library.unt.edu/eot2008/20090115174729im_/http://www.nsf.gov/images/x.gif) News From the Field Method Sorts Out Double-walled Carbon Nanotube Problem
![](https://webarchive.library.unt.edu/eot2008/20090115174729im_/http://www.nsf.gov/images/greenlineshort.jpg)
December 15, 2008
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It's hard to study something with any rigor if the subject can't be produced uniformly and efficiently. Researchers who study double-walled carbon nanotubes find themselves in just this predicament. The problem is that current techniques for synthesizing double-walled carbon nanotubes also produce unwanted single- and multi-walled nanotubes.
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Source Northwestern University
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