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@ARTICLE{Klauke:617353,
      author       = {Klauke, Lea and Kampferbeck, Michael and Holzapfel, Malte
                      and Feliu, Neus and Sochor, Benedikt and Koyiloth Vayalil,
                      Sarathlal and Meyer, Andreas and Vossmeyer, Tobias},
      title        = {{S}upraparticles from {C}ubic {I}ron {O}xide
                      {N}anoparticles: {S}ynthesis, {P}olymer {E}ncapsulation,
                      {F}unctionalization, and {M}agnetic {P}roperties},
      journal      = {Langmuir},
      volume       = {40},
      number       = {43},
      issn         = {0743-7463},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {PUBDB-2024-06719},
      pages        = {22762-22772},
      year         = {2024},
      abstract     = {Supraparticles (SPs) consisting of superparamagnetic iron
                      oxide nanoparticles (SPIONs) are of great interest for
                      biomedical applications and magnetic separation. To enable
                      their functionalization with biomolecules and to improve
                      their stability in aqueous dispersion, polymer shells are
                      grown on the SPs’ surface. Robust polymer encapsulation
                      and functionalization is achieved via atom transfer radical
                      polymerization (ATRP), improving the reaction control
                      compared to free radical polymerizations. This study
                      presents the emulsion-based assembly of differently sized
                      cubic SPIONs (12–30 nm) into SPs with diameters ranging
                      from ∼200 to ∼400 nm using dodecyltrimethylammonium
                      bromide (DTAB) as the surfactant. The successful formation
                      of well-defined spherical SPs depends upon the method used
                      for mixing the SPION dispersion with the surfactant solution
                      and requires the precise adjustment of the surfactant
                      concentration. After purification, the SPs are encapsulated
                      by growing surface-grafted polystyrene shells via activators
                      generated by electron transfer (AGET) ATRP. The polymer
                      shell can be decorated with functional groups (azide and
                      carboxylate) using monomer blends for the polymerization
                      reaction. When the amount of the monomer is varied, the
                      shell thickness as well as the interparticle distances
                      between the encapsulated SPIONs can be tuned with
                      nanometer-scale precision. Small-angle X-ray scattering
                      (SAXS) reveals that cubic SPIONs form less ordered
                      assemblies within the SPs than spherical SPIONs. As shown by
                      vibrating sample magnetometer measurements, the encapsulated
                      SPs feature the same superparamagnetic behavior as their
                      SPION building blocks. The saturation magnetization ranges
                      between 10 and 30 emu/g and depends upon the nanocubes’
                      size and phase composition.},
      cin          = {DOOR ; HAS-User / FS-PETRA-D},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731 /
                      I:(DE-H253)FS-PETRA-D-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      SFB 986 A01 - Oberflächenmodifizierte Nanokristalle:
                      Bausteine für hierarchisch strukturierte
                      Hochleistungswerkstoffe (A01) (221132716)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      G:(GEPRIS)221132716},
      experiment   = {EXP:(DE-H253)P-P03-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:39423348},
      UT           = {WOS:001340370600001},
      doi          = {10.1021/acs.langmuir.4c02753},
      url          = {https://bib-pubdb1.desy.de/record/617353},
}