% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Granite:14023,
      author       = {Granite, M. and Radulescu, A. and Pyckhout-Hintzen, W. and
                      Cohen, Y.},
      title        = {{I}nteractions between block copolymers and single-walled
                      carbon nanotubes in aqueous solutions: a small-angle neutron
                      scattering study},
      journal      = {Langmuir},
      volume       = {27},
      issn         = {0743-7463},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {PreJuSER-14023},
      pages        = {751 - 759},
      year         = {2011},
      note         = {We thank Dr. Y. Dror, Prof. R. Yerushalmi-Rozen, and Dr. R.
                      Shvartzman-Cohen for many fruitful discussions and Dr. E.
                      Kesselman, B. Shdemati, and J. Schmidt for their generous
                      help with cryo-TEM. This research was supported by the
                      Israel Science Foundation (grant no. 191/07). This work is
                      based in part on experiments performed at the Julich Centre
                      for Neutron Science JCNS, Forschungszentrum Julich, Germany.
                      This project has been supported by the European Commission
                      under the Seventh Framework Program through the key action
                      "Strengthening the European Research Area, Research
                      Infrastructures" (contract no. 226507 (NMI3)).},
      abstract     = {The amphiphilic copolymers of the Pluronic family are known
                      to be excellent dispersants for single-walled carbon
                      nanotubes (SWCNT) in water, especially F108 and F127, which
                      have rather long end-blocks of poly(ethylene oxide) (PEO).
                      In this study, the structure of the CNT/polymer hybrid
                      formed in water is evaluated by measurements of small-angle
                      neutron scattering (SANS) with contrast variation, as
                      supported by cryo-transmission electron microscopy
                      (cryo-TEM) imaging. The homogeneous, stable, inklike
                      dispersions exhibited very small isolated bundles of carbon
                      nanotubes in cryo-TEM images. SANS experiments were
                      conducted at different D(2)O/H(2)O content of the dispersing
                      solvent. The data for both systems showed surprisingly
                      minimal intensity values at $70\%$ D(2)O solvent
                      composition, which is much higher than the expected value of
                      $17\%$ D(2)O that is based on the scattering length density
                      (SLD) of PEO. At this near match point, the data exhibited a
                      q(-1) power law relation of intensity to the scattering
                      vector (q), indicating rodlike entities. Two models are
                      evaluated, as extensions to Pederson's block copolymer
                      micelles models. One is loosely adsorbed polymer chains on a
                      rodlike CNT bundle. In the other, the hydrophobic block is
                      considered to form a continuous hydrated shell on the CNT
                      surface, whereas the hydrophilic blocks emanate into the
                      solvent. Both models were found to fit the experimental data
                      reasonably well. The model fit required special
                      considerations of the tight association of water molecules
                      around PEO chains and slight isotopic selectivity.},
      keywords     = {Nanotubes, Carbon: chemistry / Polymers: chemistry /
                      Scattering, Small Angle / Solutions / Water: chemistry /
                      X-Ray Diffraction / Nanotubes, Carbon (NLM Chemicals) /
                      Polymers (NLM Chemicals) / Solutions (NLM Chemicals) / Water
                      (NLM Chemicals) / J (WoSType)},
      cin          = {PGI-4 / ICS-1 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS / JCNS-1 / JCNS-2},
      ddc          = {670},
      cid          = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)ICS-1-20110106 /
                      I:(DE-Juel1)JCNS-20121112 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      shelfmark    = {Chemistry, Multidisciplinary / Chemistry, Physical /
                      Materials Science, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21155544},
      UT           = {WOS:000285990500037},
      doi          = {10.1021/la103096n},
      url          = {https://juser.fz-juelich.de/record/14023},
}