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@ARTICLE{Yeh:887893,
      author       = {Yeh, Yi-Qi and Su, Chun-Jen and Wang, Chen-An and Lai,
                      Ying-Chu and Tang, Chih-Yuan and Di, Zhenyu and
                      Frielinghaus, Henrich and Su, An-Chung and Jeng, U-Ser and
                      Mou, Chung-Yuan},
      title        = {{D}iatom-inspired self-assembly for silica thin sheets of
                      perpendicular nanochannels},
      journal      = {Journal of colloid and interface science},
      volume       = {584},
      issn         = {0021-9797},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-04499},
      pages        = {647-659},
      year         = {2021},
      abstract     = {Hypothesis: Multistage silicate self-organization into
                      light-weight, high-strength, hierarchically pat-terned
                      diatom frustules carries hints for innovative silica-based
                      nanomaterials. With sodium silicate in a biomimetic sol-gel
                      system templated by a tri-surfactant system of
                      hexadecyltrimethylammonium bro-mide, sodium dodecylsulfate,
                      and poly(oxyethylene-b-oxypropylene-b-oxyethylene) (P123),
                      mesoporous silica nanochannel plates with perpendicular
                      channel orientation are synthesized. The formation process,
                      analogous to that of diatom frustules, is postulated to be
                      directed by an oriented self-assembly of the block copolymer
                      micelles shelled with charged catanionic surfactants upon
                      silication.Experiments: The postulated formation process for
                      the oriented silica nanochannel plates was investi-gated
                      using time-resolved small-angle X-ray and neutron scattering
                      (SAXS/SANS) and freeze fracture replication transmission
                      electron microscopy (FFR-TEM).Findings: With fine-tuned
                      molar ratios of the anionic, cationic, and nonionic
                      surfactants, the catanionic combination and the nonionic
                      copolymer form charged, prolate ternary micelles in aqueous
                      solutions, which further develop into prototype monolayered
                      micellar plates. The prolate shape and maximized surfactant
                      adsorption of the complex micelles, revealed from combined
                      SAXS/SANS analysis, are of crit-ical importance in the
                      subsequent micellar self-assembly upon silicate deposition.
                      Time-resolved SAXS and FFR-TEM indicate that the silicate
                      complex micelles coalesce laterally into the prototype
                      micellar nanoplates, which further fuse with one another
                      into large sheets of monolayered silicate micelles of
                      in-plane lamellar packing. Upon silica polymerization, the
                      in-plane lamellar packing of the micelles fur-ther
                      transforms to 2D hexagonal packing of vertically oriented
                      silicate channels. The unveiled structural features and
                      their evolution not only elucidate the previously unresolved
                      self-assembly process of through-thickness silica
                      nanochannels but also open a new line of research mimicking
                      free-standing frus-tules of diatoms.},
      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)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33198979},
      UT           = {WOS:000600220000005},
      doi          = {10.1016/j.jcis.2020.10.114},
      url          = {https://juser.fz-juelich.de/record/887893},
}