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@ARTICLE{Kutz:808417,
      author       = {Kutz, Anne and Mariani, Giacomo and Gröhn, Franziska},
      title        = {{I}onic dye–surfactant nanoassemblies: interplay of
                      electrostatics, hydrophobic effect, and π–π stacking},
      journal      = {Colloid $\&$ polymer science},
      volume       = {294},
      number       = {3},
      issn         = {1435-1536},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2016-02240},
      pages        = {591 - 606},
      year         = {2016},
      abstract     = {The interplay of several non-covalent interaction forces is
                      used as key to supramolecular structures. Combining cationic
                      alkyltrimethylammonium bromide surfactants and the divalent
                      anionic azo dye Acid Red 26 (Ar26) as small building blocks
                      in aqueous solution, electrostatic interactions of the
                      oppositely charged building blocks in combination with
                      hydrophobic effect and π–π interactions play a major
                      role in aggregate formation. Static and dynamic light
                      scattering and small-angle neutron scattering (SANS)
                      revealed different sizes of aggregates in the range of 2
                      nm ≤ R H ≤ 420 nm depending on surfactant
                      length, concentration and of dye to surfactant loading
                      ratio. A strong relationship of assembly size with
                      surfactant concentration has been found, where initial
                      surfactant monomers and micelles influence the aggregate
                      formation differently. The stability of dye–surfactant
                      aggregates which also shows a dependency on surfactant tail
                      length has been related to ζ-potential measurements.
                      Small-angle neutron scattering elucidated that
                      dye–surfactant aggregates possess cylindrical shapes with
                      different aspect ratios. UV/Vis spectroscopy gave
                      information on the dye–dye π–π stacking geometry and
                      extent, while the thermodynamic parameters for micellization
                      and dye–surfactant binding ΔH, ΔG, and ΔS as well as
                      stoichiometry and binding constant obtained by isothermal
                      titration calorimetry revealed insight into the interplay of
                      interactions.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000372259300012},
      doi          = {10.1007/s00396-015-3814-2},
      url          = {https://juser.fz-juelich.de/record/808417},
}