% 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{Zinn:278745,
      author       = {Zinn, Thomas and Willner, Lutz and Pipich, Vitaliy and
                      Richter, Dieter and Lund, Reidar},
      title        = {{E}ffect of {C}ore {C}rystallization and {C}onformational
                      {E}ntropy on the {M}olecular {E}xchange {K}inetics of
                      {P}olymeric {M}icelles},
      journal      = {ACS Macro Letters},
      volume       = {4},
      number       = {6},
      issn         = {2161-1653},
      address      = {Washington, DC},
      publisher    = {ACS},
      reportid     = {FZJ-2015-07012},
      pages        = {651 - 655},
      year         = {2015},
      abstract     = {Here we systematically study the equilibrium molecular
                      exchange kinetics of a series of amphiphilic
                      n-alkyl-poly(ethylene oxide) (Cn-PEO) micelles containing
                      partly crystallized cores. Using differential scanning
                      calorimetry (DSC), we determined the melting transition and
                      extracted the enthalpy of fusion, ΔHfus, of the n-alkyl
                      chains inside the micellar core. Molecular exchange kinetics
                      was measured below the melting point using a time-resolved
                      small-angle neutron scattering technique (TR-SANS) based on
                      mixing deuterated and proteated but otherwise identical
                      micelles. Comparing both kinetic and thermodynamic data, we
                      find that crystallinity within the micellar cores leads to
                      significant enthalpic and the entropic contributions to the
                      activation barrier for molecular exchange. While the former
                      leads to an enhanced stability, the positive entropic gain
                      favors the process. Interestingly, the entropic term
                      contains an excess term beyond what is expected from the
                      measured entropy of fusion. Based on calculations using the
                      Rotational Isomeric State (RIS) model, we suggest that the
                      excess entropy is due to the gain in conformational entropy
                      upon releasing the chain from the confined state in the
                      core. The study thus provides deep insight into the
                      fundamental processes of micellar kinetics and which might
                      be relevant also to other semicrystalline soft matter and
                      biological systems including lipid membranes.},
      cin          = {Neutronenstreuung ; JCNS-1 / JCNS (München) ; Jülich
                      Centre for Neutron Science JCNS (München) ; JCNS-FRM-II /
                      ICS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)ICS-1-20110106},
      pnm          = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
                      6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6215 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000356757800011},
      doi          = {10.1021/acsmacrolett.5b00197},
      url          = {https://juser.fz-juelich.de/record/278745},
}