Color Tuning of Electrochromic TiO2Nanofibrous Layers Loaded with Metal and Metal Oxide Nanoparticles for Smart Colored Windows

Cavit Eyovge*, Cristian S. Deenen, Francisco Ruiz-Zepeda, Stephan Bartling, Yury Smirnov, Monica Morales-Masis, Arturo Susarrey-Arce, Han Gardeniers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Co-axial electrospinning was applied for the structuring of non-woven webs of TiO2 nanofibers loaded with Ag, Au, and CuO nanoparticles. The composite layers were tested in an electrochromic half-cell assembly. A clear correlation between the nanoparticle composition and electrochromic effect in the nanofibrous composite is observed: TiO2 loaded with Ag reveals a black-brown color, Au shows a dark-blue color, and CuO shows a dark-green color. For electrochromic applications, the Au/TiO2 layer is the most promising choice, with a color modulation time of 6 s, transmittance modulation of 40%, coloration efficiency of 20 cm2/C, areal capacitance of 300 F/cm2, and cyclic stability of over 1000 cycles in an 18 h period. In this study, an unexplored path for the rational design of TiO2-based electrochromic device is offered with unique color-switching and optical efficiency gained by the fibrous layer. It is also foreseen that co-axial electrospinning can be an alternative nanofabrication technique for smart colored windows.

Original languageEnglish
Pages (from-to)8600-8610
Number of pages11
JournalACS Applied Nano Materials
Issue number8
Publication statusPublished - 27 Aug 2021


  • co-axial fibers
  • color tuning
  • electrochromism
  • electrospinning
  • nanoparticles
  • UT-Hybrid-D


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