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@ARTICLE{SchmittPauly:279321,
      author       = {Schmitt Pauly, Céline and Genix, Anne-Caroline and
                      Alauzun, Johan G. and Guerrero, Gilles and Appavou,
                      Marie-Sousai and Pérez, Javier and Oberdisse, Julian and
                      Mutin, P. Hubert},
      title        = {{S}imultaneous {P}hase {T}ransfer and {S}urface
                      {M}odification of {T}i{O} 2 {N}anoparticles {U}sing
                      {A}lkylphosphonic {A}cids: {O}ptimization and {S}tructure of
                      the {O}rganosols},
      journal      = {Langmuir},
      volume       = {31},
      number       = {40},
      issn         = {1520-5827},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2015-07336},
      pages        = {10966 - 10974},
      year         = {2015},
      note         = {"final draft post referee" kann nicht beigebracht werden},
      abstract     = {An original protocol of simultaneous surface modification
                      and transfer from aqueous to organic phases of anatase TiO2
                      nanoparticles (NPs) using alkylphosphonic acids (PAs) is
                      studied. The influence of the solvent, the nature and
                      concentration of the PA, and the size, concentration, and
                      aggregation state of the TiO2 NPs was investigated. Complete
                      transfer was observed for linear alkyl chains (5, 8, 12, and
                      18 C atoms), even at very high sol concentrations. After
                      transfer, the grafted NPs were characterized by 31P
                      solid-state MAS NMR. The dispersion state of NPs before and
                      after phase transfer was monitored by dynamic light
                      scattering (DLS). Small-angle neutron scattering (SANS) was
                      used to characterize the structure of PA-grafted NPs in the
                      organic solvent. Using a quantitative core–shell model
                      cross-checked under different contrast conditions, it is
                      found that the primary particles making up the NPs are
                      homogeneously grafted with a solvated PA-layer. The
                      nanometric thickness of the latter is shown to increase with
                      the length of the linear carbon chain of the PA, independent
                      of the size of the primary TiO2 NP. Interestingly, a
                      reversible temperature-dependent aggregation was evidenced
                      visually for C18PA, and confirmed by DLS and SANS: heating
                      the sample induces the breakup of aggregates, which
                      reassemble upon cooling. Finally, in the case of NPs
                      agglomerated by playing with the pH or the salt
                      concentration of the sols, the phase transfer with PA is
                      capable of redispersing the agglomerates. This new and
                      highly versatile method of NP surface modification with PAs
                      and simultaneous transfer is thus well suited for obtaining
                      well-dispersed grafted NPs.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      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:000362920900005},
      doi          = {10.1021/acs.langmuir.5b02833},
      url          = {https://juser.fz-juelich.de/record/279321},
}