Hetero-core structured fiber optic chemical sensor based on surface plasmon resonance using Au/lipid films

Ai Hosoki, Michiko Nishiyama, Norikazu Kumekawa, Kazuhiro Watanabe, Rui Yatabe, Yusuke Tahara, Takeshi Onodera, Akifumi Sugiyama, Nozomu Sakurai

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

In this study, a novel chemical sensor is developed based on the surface plasmon resonance (SPR) on hetero-core structured optical fibers with double-layer films of gold and lipid. Two lipids, namely, oleic acid and phosphoric acid di(2-ethylhexyl) ester (PAEE), were applied to the fiber surface. We observed different shifts of the SPR resonant wavelength and changes in the spectral width for different chemical solutions (i.e., quinine, hydroquinidine, gramine, and caffeine) whose refractive indices are close to each other. The shifts in the SPR resonant wavelength of the Au-coated sensor with oleic acid and PAEE were 22.0 and 14.5 nm for quinine, 20.7 and 12.4 nm for hydroquinidine, -3.4 and 9.2 nm for gramine, and 0 and 0.1 nm for caffeine, respectively. The Au-coated SPR sensor without a lipid membrane did not show these differences, implying different chemical interactions between the lipid and chemicals would occur and change the dielectric functions of the coated lipid films. The oleic acid-coated sensor with thin Au films provided a rapid time response within 2 s. In summary, the proposed lipid-coated sensor with thin Au films facilitates chemical sensing in a limited area, such as the rhizosphere.

本文言語英語
論文番号128751
ジャーナルOptics Communications
524
DOI
出版ステータス出版済み - 12月 1 2022

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 物理化学および理論化学
  • 電子工学および電気工学

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