TITLE

Diameter-selective separation of double-walled carbon nanotubes

AUTHOR(S)
Kim, Jin Hee; Kataoka, Masakazu; Kim, Yoong Ahm; Shimamoto, Daisuke; Muramatsu, Hiroyuki; Hayashi, Takuya; Endo, Morinobu; Terrones, Mauricio; Dresselhaus, Mildred S.
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/1/2008, Vol. 93 Issue 22, p223107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Here, we report a simple and effective way of separating double-walled carbon nanotubes as a function of their diameter using individually dispersed nanotube solutions with the aid of long and random single-stranded DNA. The subtle pH change in nanotube solutions gives rise to the preferential coagulation of large-diameter tubes and allows the easy preparation of small-diameter tubes. The stronger van der Waals forces between large-diameter tubes, combined with the decreased solubility of DNA in water at low pH, lead to the preferential agglomeration of large-diameter tubes.
ACCESSION #
35763877

 

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