Synthesis of high-performance photonic crystal film for SERS applications via drop-coating method

Ming Xue Wei, Chao Hui Liu, Han Lee, Bo Wei Lee, Chun Han Hsu, Hong Ping Lin, Yu Chun Wu

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Silica nanospheres with a well-controlled particle size were prepared via a nucleation-to-growth synthesis process. A facile method is proposed for improving the self-assembly behavior of silica colloidal particles in droplet coatings by the simple controlling of the drying temperature. It is shown that a periodically arranged, opal-structured, photonic crystal film with a large area of approximately 4.0 cm2 can be prepared, even when the particle size is up to 840 nm. When the band gap of the silica photonic crystals falls in the visible-light region, the crystals exhibit distinct structural colors. Moreover, the wavelength of the reflected light increases with an increasing particle size of silica. When the photonic band gap overlaps the wavelength of the laser source, the overall Raman spectrum intensity is significantly enhanced. Accordingly, the proposed nucleation-to-growth process and drop-coating method provides a cheap and simple approach for the manufacture of uniform sized silica and surface-enhanced Raman scattering substrates, respectively.

原文English
文章編號679
期刊Coatings
10
發行號7
DOIs
出版狀態Published - 2020 7月 1

All Science Journal Classification (ASJC) codes

  • 表面和介面
  • 表面、塗料和薄膜
  • 材料化學

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