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      Chemical tracking of temperature by concurrent periodic precipitation pattern formation in polyacrylamide gels

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      Author(s)
      Khan, Muhammad Turab Ali
      Kwiczak-Yiğitbaşı, Joanna
      Tootoonchian, Pedram
      Morsali, Mohammad
      Lagzi, Istvan
      Baytekin, Bilge
      Date
      2022-01-20
      Source Title
      ACS Applied Materials & Interfaces
      Publisher
      American Chemical Society
      Volume
      14
      Issue
      5
      Pages
      7252 - 7260
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      In nature, nonequilibrium systems reflect environmental changes, and these changes are often “recorded” in their solid body as they develop. Periodic precipitation patterns, aka Liesegang patterns (LPs), are visual sums of complex events in nonequilibrium reaction–diffusion processes. Here we aim to achieve an artificial system that “records” the temperature changes in the environment with the concurrent LP formation. We first illustrate the differences in 1-D LPs developing at different temperatures in terms of band spacings, which can demonstrate the time, ramp steepness, and extent of a temperature change. These results are discussed and augmented by a mathematical model. Using scanning electron microscopy, we show that the average size of the CuCrO4 precipitate also reflects the temperature changes. Finally, we show that these changes can also be “recorded” in the 2-D and 3-D LPs, which can have applications in long-term temperature tracking and complex soft material design.
      Keywords
      Periodic patterns
      Liesegang phenomenon
      Polyacrylamide gel
      Permalink
      http://hdl.handle.net/11693/111607
      Published Version (Please cite this version)
      https://www.doi.org/10.1021/acsami.1c20640
      Collections
      • Department of Chemistry 707
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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