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231223s2007 xx ||||| 00| ||eng c |
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|a pubmed24n0561.xml
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|a (DE-627)NLM168327058
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|a (NLM)17291020
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Kocharova, Natalia
|e verfasserin
|4 aut
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| 245 |
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|a Aqueous dispersion, surface thiolation, and direct self-assembly of carbon nanotubes on gold
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| 264 |
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 06.07.2007
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a We report the efficient aqueous dispersion of pristine HiPco single-walled carbon nanotubes (SWNTs) with ionic liquid (IL)-based surfactants 1-dodecyl-3-methylimidazolium bromide (1) and 1-(12-mercaptododecyl)-3-methylimidazolium bromide (2), the thiolation of nanotube sidewalls with 2, and the controlled self-assembly of positively charged SWNT-1,2 composites on gold. Optical absorption spectra and resonance Raman (RR) data of obtained aqueous SWNT-1,2 dispersions are consistent with debundled and noncovalently functionalized nanotubes whose electronic properties have not been disturbed. Additionally, the dispersion of pristine nanotube material with surfactants 1 and 2 leads to a high degree of purification from carbonaceous particles. The chiralities of the 14 smallest semiconducting HiPco SWNTs in resonance with Raman excitation at 1064 nm (1.165 eV) were determined in SWNT-2 aqueous dispersion using UV-vis-NIR and RR spectra. X-ray photoelectron spectroscopy (XPS) and surface-enhanced resonance Raman scattering (SERRS) spectroscopy of SWNT-2 submonolayers on gold verified the encapsulation of individualized SWNTs with IL surfactants, the cleavage of S-S disulfide bonds formed in aqueous SWNT-2 suspensions, and the direct chemisorption of the SWNT-2 composite on bare gold via the Au-S bond. Aqueous dispersions of SWNTs with IL-based surfactants add biofunctionality to carbon nanotubes by imparting the positive surface charge necessary for interactions with cell membranes. Our technique, which purifies pristine nanotube material and produces water-soluble, positively charged nanotubes with pendent surface-active thiol groups, may also be translated to other carbon nanotubes and carbon nanostructures. Self-assembled, positively charged submonolayers of SWNTs can be further used for applications in cell biology and sensor technology
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Detergents
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|a Nanotubes, Carbon
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|a Polystyrenes
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|a Polyvinyls
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|a Solvents
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|a Sulfhydryl Compounds
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|a Water
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|a 059QF0KO0R
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|a poly(2-vinylpyridine)
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|a 25014-15-7
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|a Toluene
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|a 3FPU23BG52
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|a Gold
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|a 7440-57-5
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|a Octoxynol
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|a 9002-93-1
|2 NLM
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1 |
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|a Aäritalo, Timo
|e verfasserin
|4 aut
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|a Leiro, Jarkko
|e verfasserin
|4 aut
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|a Kankare, Jouko
|e verfasserin
|4 aut
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|a Lukkari, Jukka
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 23(2007), 6 vom: 13. März, Seite 3363-71
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:23
|g year:2007
|g number:6
|g day:13
|g month:03
|g pages:3363-71
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|a AR
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|d 23
|j 2007
|e 6
|b 13
|c 03
|h 3363-71
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