Abstract
Alcohol detection plays a key role in food safety and alcohol detection. Therefore, we propose a fast and label-free Ni(OH)2 nanoflowers/Au alcohol sensor based on surface plasmon resonance(SPR). Ni(OH)2 nanoflowers are grown on gold film by hydrothermal complex precipitation method. When the alcohol concentration increases, the resonance wavelength will be redshifted. More interestingly, the sensitivity of Ni(OH)2 nanoflowers/Au structure is increased to 232.4 nm/vol%. In the alcohol concentration range of 0 vol% − 60 vol%, the linearity between resonance wavelength and refractive index is greater than 0.98, which ensures the detection resolution and significantly improves the performance of SPR sensor. The high sensitivity and morphology advantage of nickel hydroxide indicate the potential of the device in alcohol detection.
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