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@ARTICLE{Schmutzler:867573,
      author       = {Schmutzler, Tilo and Schindler, Torben and Zech, Tobias and
                      Lages, Sebastian and Thoma, Martin and Appavou, Marie-Sousai
                      and Peukert, Wolfgang and Spiecker, Erdmann and Unruh,
                      Tobias},
      title        = {n -{H}exanol {E}nhances the {C}etyltrimethylammonium
                      {B}romide {S}tabilization of {S}mall {G}old {N}anoparticles
                      and {P}romotes the {G}rowth of {G}old {N}anorods},
      journal      = {ACS applied nano materials},
      volume       = {2},
      number       = {5},
      issn         = {2574-0970},
      address      = {Washington, DC},
      publisher    = {ACS Publications},
      reportid     = {FZJ-2019-06196},
      pages        = {3206 - 3219},
      year         = {2019},
      abstract     = {Gold nanorods (AuNRs) are of interest for many
                      applications, since their absorption in the regime of
                      visible light can easily be tuned by their exact shape. To
                      produce these AuNRs, a two-step synthesis that starts from
                      small seed particles is used. These seed particles are
                      stabilized by cetyltrimethylammonium bromide (CTAB), which
                      forms micelles at the used concentration (0.1 mol/L). In
                      this work, the influence of the micelle morphology on the
                      stabilization of these seed particles and the consequences
                      on the formation of AuNRs is reported. The elongation of
                      CTAB micelles by the addition of n-hexanol leads to much
                      more stable seed particle dispersions and thus less
                      polydisperse AuNRs. In contrast, a higher number of micelles
                      compared to pure CTAB dispersions result from the addition
                      of n-pentanol. This promotes the formation of larger seed
                      particles and leads to lower yields of AuNRs. The gold
                      nanoparticles are characterized by UV–vis–NIR absorption
                      spectroscopy, transmission electron microscopy, and
                      small-angle X-ray scattering (SAXS). The morphology of the
                      micelles has been determined by a combination of SAXS and
                      small-angle neutron scattering (SANS). The experimental
                      results were used to calculate the collision kinetics of
                      seed particles by using an improved approach of classical
                      coagulation theory to consider the anisotropy of the
                      micelles. The combination of these experiments with the
                      calculations strongly supports the mechanistic model—that
                      these gold seed particles are not stabilized by a CTAB
                      bilayer but by the micelles itself. For the first time, the
                      influence of the micellar size and shape on the
                      stabilization mechanism of noble metal nanoparticles could
                      be clarified. Theses findings contribute to the development
                      of targeted design routes for distinct nanoparticle
                      morphologies by the use of suitable dispersions.},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000469410000068},
      doi          = {10.1021/acsanm.9b00510},
      url          = {https://juser.fz-juelich.de/record/867573},
}