Journal of Materials Research and Technology (May 2023)

Topologically devised flexible bi-aeolotropic conduction Janus-like bi-layer membrane functionalized by red-green bicolor fluorescence

  • Yaolin Hu,
  • Haina Qi,
  • Liu Yang,
  • Yunrui Xie,
  • Qianli Ma,
  • Yuqi Sheng,
  • Hong Shao,
  • Wensheng Yu,
  • Dan Li,
  • Xiangting Dong

Journal volume & issue
Vol. 24
pp. 8644 – 8655

Abstract

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To further advance the development for new-generations of high-performance, miniaturized and flexible electronic devices, it is particularly significant to research new-typed fluorescence-functionalized bi-aeolotropic conduction membrane. Herein, a unique topology optimization design philosophy is proposed, which highly integrates macroscopic with microscopic partitions to manufacture high-performance aeolotropic conduction membrane functionalized by fluorescence. Topologically devised Janus-like bi-layer membrane (JBM) with bi-aeolotropic conduction and red-green bicolor fluorescence is successfully assembled by using a bi-axis electro-spinning. [PANI/PMMA]//[Eu(TTA)3bipy/PMMA] Janus-structured micro-fiber and [PANI/PMMA]//[Tb(acac)3phen/PMMA] Janus-structured micro-fiber was respectively employed as microcosmic constructing unit to align directionally to build first layer (JBM-F) and second layer (JBM-S) of the JBM. Macroscopically, for the JBM, each layer has aeolotropic conduction, and furthermore, the conductive orientations of the two layers are vertical, and the insulated orientations are also vertical, leading in the bi-aeolotropic conduction of the JBM. The strongest conductive aeolotropism for each layer can reach 108 when the PANI/PMMA is 65%. The introduction of the Eu and Tb complexes into the Janus-structured micro-fiber gives the JBM excellent red-green bicolor fluorescence. The fluorescent traits can be employed to visualize the operational state of JBM. The high integration of Janus-structured micro-fiber possessing microcosmic partition with Janus-like bi-layer membrane possessing macrocosmic partition achieves the efficacious separation of electrical and fluorescent fillers to shun the deleterious interferences between two functions to obtain superior fluorescence and bi-aeolotropic conduction. Interestingly, the prepared flexible JBM can be applied as a reliable microcircuit interconnection, providing a basis for practical applications.

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