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Enrichment of (8,4) Single‐Walled Carbon Nanotubes Through Coextraction with Heparin
Author(s) -
Yan Liang Yu,
Li Weifeng,
Fan Xiao Feng,
Wei Li,
Chen Yuan,
Kuo JerLai,
Li LainJong,
Kwak Sang Kyu,
Mu Yuguang,
ChanPark M. B.
Publication year - 2010
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200900865
Subject(s) - dodecylbenzene , carbon nanotube , dispersant , sulfonate , materials science , sodium , photoluminescence , heparin , salt (chemistry) , chemical engineering , nanotechnology , chemistry , dispersion (optics) , organic chemistry , optoelectronics , biochemistry , physics , engineering , optics , metallurgy
Heparin sodium salt is investigated as a dispersant for dispersing single‐walled carbon nanotubes (SWNTs). Photoluminescence excitation (PLE) spectroscopy is used for identification and abundance estimation of the chiral species. It is found that heparin sodium salt preferentially disperses larger‐diameter Hipco SWNTs. When used to disperse CoMoCAT nanotube samples, heparin has a strong preference for (8,4) tubes, which have larger diameter than the predominant (6,5) in pristine CoMoCAT samples. PLE intensity due to (8,4) tubes increases from 7% to 60% of the total after threefold extractions. Computer modeling verifies that the complex of (8,4) SWNTs and heparin has the lowest binding energy amongst the four semiconducting species present in CoMoCAT. Network field‐effect transistors are successfully made with CoMoCAT/heparin and CoMoCAT/sodium dodecylbenzene sulfonate (SDBS)–heparin (x3), confirming the easy removability of heparin.