4.6 Article

Preparation of narrow photonic bandgaps located in the near infrared region and their applications in ethanol gas sensing

Journal

JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 34, Pages 5285-5291

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30782d

Keywords

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Funding

  1. National Basic Research Program of China (973 Program) [2012CB932303]
  2. National Natural Science Foundation of China [11074254, 51171176]
  3. Hundred Talent Program of Chinese Academy of Sciences
  4. President Foundation of Hefei Institute of Physical Sciences

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In this work, we demonstrated the use of a promising sensor based on alumina Photonic Crystals (PC) which can be applied in the field of gas detection owing to the well structured PC with an ultra-narrow Photonic Bandgap (PBG), of which the full width at half maximum is only 30 nm. This type of PC was prepared successfully by using a compensation voltage mode method, which can effectively compensate for the chemical corrosion and the slowing down of ion exchange, resulting in a uniform diameter of the pores in the anodic alumina oxidation (AAO) from beginning to end. The as-prepared sample was applied to detect the concentration of organic vapor, such as ethanol, in this experiment. A large PBG shift is achieved when the concentration of ethanol changes, and the mechanism was also discussed theoretically. This sensor had a good repeatability due to the chemical and physical stability of the matrix material (alumina). These results indicate the potential applications of the as-prepared AAO based PC in the sensing field.

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