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@ARTICLE{Zhang:56608,
      author       = {Zhang, Z. and Berns, A. E. and Willbold, S. and Buitenhuis,
                      J.},
      title        = {{S}ynthesis of poly(ethylene glycol) ({PEG})-grafted
                      colloidal silica particles with improved stability in
                      aqueous solvents},
      journal      = {Journal of colloid and interface science},
      volume       = {310},
      issn         = {0021-9797},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-56608},
      pages        = {446 - 455},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The known grafting procedures of colloidal silica particles
                      with poly(ethylene glycol) (PEG) lead to grafting layers
                      that detach from the silica surface and dissolve in water
                      within a few days. We present a new grafting procedure of
                      PEG onto silica with a significant improvement of the
                      stability of the grafting layers in aqueous solvents.
                      Moreover, the procedure avoids any dry states or other
                      circumstances leading to strong aggregation of the
                      particles. To achieve the improved water stability, Stöber
                      silica particles are first pre-coated with a silane coupling
                      agent (3-aminopropyl)triethoxysilane (APS) to incorporate
                      active amine groups. The water solubility of the pre-coating
                      layer was minimized using a combination of APS with
                      bis-(trimethoxysilylpropyl)amine (BTMOSPA) or
                      bis-(triethoxysilyl)ethane (BTEOSE). These pre-coated
                      particles were then reacted with N-succinimidyl ester of
                      mono-methoxy poly(ethylene glycol) carboxylic acid to form
                      PEG-grafted silica particles. The particles form stable
                      dispersions in aqueous solutions as well as several organic
                      solvents.},
      keywords     = {J (WoSType)},
      cin          = {ICG-4 / IFF-7 / ZCH},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB793 / I:(DE-Juel1)VDB787 /
                      I:(DE-Juel1)ZCH-20090406},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK414},
      shelfmark    = {Chemistry, Physical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:17346738},
      UT           = {WOS:000246459700014},
      doi          = {10.1016/j.jcis.2007.02.024},
      url          = {https://juser.fz-juelich.de/record/56608},
}