Electrochemical protonation/de-protonation of titania nanotubes decorated with silver phosphate crystals: An enhanced electrochromic color contrast

Subash Adhikari, Yan Yan Song, Yong Mei Wang, Mahesh Niraula, Keumnam Cho, Suresh Kumar Dhungel, Zhi Da Gao, Nabeen K. Shrestha, Sung Hwan Han

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

In the present work, anodically grown self-organized titania nanotubes are decorated with silver phosphate crystals using a layer-by-layer technique from an aqueous solution containing silver and phosphate ion precursors. The TiO2-Ag3PO4 nanostructures are characterized using field enhanced scanning electron microscopy, energy dispersive X-ray analyser, X-ray diffractometry and X-ray photoelectron spectroscopy. The electrochromic behaviours of the TiO2 nanotube with and without decoration of Ag3PO4 crystals are studied by applying a potential pulsed combined with in situ reflectance measurement of the color contrast response. The deposition of Ag3PO4 crystals has exhibited an enhanced color contrast of the nanotubes. Among various samples, the amorphous nanotubes decorated uniformly with Ag3PO4 crystals without blocking the tube openings has demonstrated the strongest color contrast. The experiments demonstrate that the enhanced color contrast is due to the synergetic contribution from the TiO2 nanotubes and the Ag3PO4 deposits.

Original languageEnglish
Pages (from-to)112-117
Number of pages6
JournalOptical Materials
Volume40
DOIs
StatePublished - 1 Feb 2015

Keywords

  • Color contrast
  • Electrochromic
  • Intercalation
  • Silver phosphate
  • Titania nanotubes

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