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Diameter‐selective desorption of semiconducting single‐wall carbon nanotubes from agarose gel
Author(s) -
Liu Huaping,
Tanaka Takeshi,
Feng Ye,
Kataura Hiromichi
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201000691
Subject(s) - elution , agarose , carbon nanotube , desorption , adsorption , chromatography , materials science , chemistry , carbon fibers , analytical chemistry (journal) , chemical engineering , nanotechnology , organic chemistry , composite material , composite number , engineering
Single‐wall carbon nanotubes (SWCNTs) were separated into metallic (M‐) and semiconducting (S‐) parts using agarose gel column chromatography method. Due to their weak interaction with agarose gel, M‐SWCNTs directly passed through the column with SDS solution while S‐SWCNTs were trapped in the gel. Then S‐SWCNTs were desorbed and eluted with sodium deoxycholate (DOC) solution from the gel. It was found that by successively increasing DOC concentration for the elution, smaller‐diameter S‐SWCNTs were firstly eluted with the lower‐concentration DOC solutions and then larger‐diameter S‐SWCNTs were eluted with the higher‐concentration DOC solutions. Thus, a kind of diameter sorting of S‐SWCNTs was achieved. We also found that the relative concentration of M‐SWCNTs in the earlier eluted smaller‐diameter S‐SWCNT fractions was much lower than that in the later eluted larger‐diameter S‐SWCNT fractions, indicating higher‐purity S‐SWCNTs can be obtained by selective fractional collection.