Surface plasmon resonance biochip based on ZnO thin film for nitric oxide sensing

Wei Yi Feng, Nan Fu Chiu, Hui Hsin Lu, Hsueh Ching Shih, Dongfang Yang, Chii Wann Lin*


研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)


In this study, the design of a novel optical sensor that comprises surface plasmon resonance sensing chip and zinc oxide nano-film was proposed for the detection of nitric oxide gas. The electrical and optical properties of zinc oxide film vary in the presence of nitric oxide. This effect was utilized to prepare biochemical sensors with transduction based on surface plasmon resonance. Due to the refractive index of the transparent zinc oxide film that was deposited on the gold film, however, changes will be observed in the surface plasmon resonance spectra. For this reason, the thickness of zinc oxide film will be investigated and determined in this study. The interaction of nitric oxide with a 20 nm zinc oxide layer on gold leads to the shift of the resonance angle. The analysis on the reflectance intensity of light demonstrates that such effect is caused by the variation of conductivity and permittivity of zinc oxide film. Finally, a shift in surface plasmon resonance angle was measured in 25 ppm nitric oxide at 180 °C and a calibration curve of nitride oxide concentration versus response intensity was successfully obtained in the range of 250 to 1000 ppm nitric oxide at lower temperature of 150 °C. Moreover, these effects are quasi-reversible.

頁(從 - 到)62-66
期刊Journal of Bionanoscience
出版狀態已發佈 - 2008 6月

ASJC Scopus subject areas

  • 生物技術
  • 生物材料
  • 生物醫學工程


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