Azobenzene-based lustrous golden thin films fabricated by electrophoretic deposition

N. Saito, Kosaku Yanada, Yukishige Kondo

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A lustrous golden thin film has been fabricated on electrode surfaces by electrophoretic deposition (EPD) of azobenzene-based organic molecular crystals (DC-azo). The molecular crystals were deposited on the anodic substrate by applying a DC voltage of 30 − 200 V in a hexane suspension. The crystal structure, electronic, and optical features of the EPD film were determined using single-crystal and powder X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy, and density functional theory calculations. Cross-sectional microscopic observation indicates that plate-like DC-azo crystals are parallelly aligned to the electrode surfaces, resulting in preferential orientation along the (001) plane. Stacking of the planar faces produces the metallic luster and a relatively high specular reflectance in the range of 540 − 780 nm owing to the absorption of incident light and its multiple reflection at the surface of each plane. The lightweight and insulating DC-azo crystals demonstrate that EPD could provide a promising route to decorate a wide variety of material surfaces with metal-free, non-electroconductive textures.

Original languageEnglish
Article number123705
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Publication statusPublished - 20 Oct 2019


  • Azobenzene
  • Density functional theory (DFT)
  • Electrophoretic deposition (EPD)
  • Gold luster
  • Reflectance

Fingerprint Dive into the research topics of 'Azobenzene-based lustrous golden thin films fabricated by electrophoretic deposition'. Together they form a unique fingerprint.

Cite this