Structural Coloration of a Colloidal Amorphous Array is Intensified by Carbon Nanolayers

Yukikazu Takeoka, Masanori Iwata, Takahiro Seki, Khanin Nueangnoraj, Hirotomo Nishihara, Shinya Yoshioka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In this study, we introduce the possibility of applying a colloidal amorphous array composed of fine silica particles as a structural-color material to invisible information technology. The appearance of a thick filmlike colloidal amorphous array formed from fine silica particles is considerably influenced by incoherent light scattering across the entire visible region. Therefore, regardless of the diameter of the fine silica particles, the thick colloidal amorphous array exhibits a white color to the naked eye. When carbon is uniformly deposited in the colloidal amorphous array by a pressure-pulsed chemical vapor deposition method, incoherent light scattering in the colloidal amorphous array is suppressed. As a result, coherent light scattering due to the short-range order in the colloidal amorphous array becomes conspicuous and the array exhibits a vivid structural color. As structures, such as letters and pictures, can be drawn using this technology, the colloidal amorphous array as a structural-colored material may also be applicable for invisible information technology.

Original languageEnglish
Pages (from-to)4282-4288
Number of pages7
JournalLangmuir
Volume34
Issue number14
DOIs
Publication statusPublished - 2018 Apr 10

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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