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      Effect of the polarity of solvents on periodic precipitation: Formation of hierarchical revert liesegang patterns

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      Author(s)
      Holló, Gábor
      Zámbó, Dániel
      Deák, András
      Rossi, Federico
      Rossi, Federico
      Cucciniello, Raffaele
      Nostro, Pierandrea Lo
      Nabika, Hideki
      Baytekin, Bilge
      Lagz, István
      Itatani, Masaki
      Date
      2022-10-11
      Source Title
      The Journal of Physical Chemistry B
      Publisher
      American Chemical Society
      Volume
      126
      Issue
      41
      Pages
      8322 - 8330
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Liesegang pattern (LP) is one example of self-organized periodic precipitation patterns in nonequilibrium systems. Several studies have demonstrated that the LP morphology can track physicochemical environmental conditions (e.g., temperature); however, the polarity effect has not been explored to date. In this study, a copper chromate system is used to reveal the impact of solvent polarity on the evolving LP structure using water/organic solvent mixtures. In the typical case of using water/dimethyl sulfoxide (DMSO) mixtures, two drastic changes in LP morphology with increasing DMSO contents were found: (i) increasing frequency of the original structure and (ii) formation of a hierarchical pattern with the appearance of another, lower-frequency structure. Furthermore, the simulation model operating with a bimodal size distribution, allowing both homogeneous and heterogeneous precipitations showed good agreement with the experimental results. Therefore, this study demonstrated that LP can be tailored by solvent polarity and can be used for designing hierarchical precipitation patterns in a straightforward manner.
      Keywords
      Nanoparticles
      Polarity
      Precipitation
      Self organization
      Solvents
      Permalink
      http://hdl.handle.net/11693/111605
      Published Version (Please cite this version)
      https://www.doi.org/10.1021/acs.jpcb.2c05810
      Collections
      • Department of Chemistry 707
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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