Self-cleaning, broadband and quasi-omnidirectional antireflective structures based on mesocrystalline rutile TiO2 nanorod arrays

Jinguang Cai, Jianfeng Ye, Suyue Chen, Xiaowei Zhao, Dayong Zhang, Shuai Chen, Yurong Ma, Song Jin, Limin Qi

研究成果: Article査読

123 被引用数 (Scopus)

抄録

We report excellent broadband and quasi-omnidirectional antireflective (AR) structures based on highly stable, self-cleaning, mesocrystalline rutile TiO2 nanorod arrays, which were grown by a facile hydrothermal synthesis directly on Ti foils. Typically, each hierarchical nanorod is a single-crystal-like rutile TiO2 mesocrystal comprising many [001]-oriented nanotips about 10-30 nm in diameter grown on the top of a [001]-oriented stem nanorod about 100-400 nm in diameter. These novel hierarchical mesostructures exhibit efficient suppression of reflection towards wavelengths ranging from visible to near infrared (NIR) region, with reflection <0.5% in the visible region and <2% in the NIR region, at a wide range of incident angles ranging from nearly normal to 45°. These excellent antireflection properties could be attributed to an optimized graded refractive index profile resulting from the hierarchical tips-on-rod structure of the mesocrystalline nanorods. The chemical and thermal stability of rutile TiO 2 endows the prepared mesocrystalline TiO2 AR structures with high stability. Moreover, the AR structures exhibit useful self-cleaning properties either under UV irradiation or through fluorosilane-modification.

本文言語English
ページ(範囲)7575-7581
ページ数7
ジャーナルEnergy and Environmental Science
5
6
DOI
出版ステータスPublished - 2012 6月
外部発表はい

ASJC Scopus subject areas

  • 環境化学
  • 再生可能エネルギー、持続可能性、環境
  • 原子力エネルギーおよび原子力工学
  • 汚染

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