Citation:
ZHANG Xin, LI Yan-Song, HAN Rui, JIANG Yan-Yan, LIU Zhe-Han. Construction of Molecularly Imprinted Photonic Crystal Sensor for Detection of Bisphenol A and Dicyandiamide[J]. Chinese Journal of Analytical Chemistry,
;2020, 48(3): 389-395.
doi:
10.19756/j.issn.0253-3820.191684
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The molecular imprinting technique and photonic crystal materials were combined to construct an array of sensors based on inverse-opal structure molecularly imprinted photonic crystal film (MIPPs) for the determination of trace amounts of bisphenol A (BPA) and dicandiamide (DCD) in environmental water samples. The polymerization system of molecularly imprinting and elution system were optimized. The best adsorptive property and the maximum diffraction peak of the prepared BPA and DCD molecularly imprinted photonic crystal film were achieved when the ratios of monomer and template molecules were 1:2 and 1:4, respectively. The performance of the MIPPs sensor array was investigated by adsorption kinetics and adsorption isotherm experiments. Experimental results showed that the response time of the prepared MIPPs for BPA and DCD were 2.5 and 4.0 min, respectively. In the concentration range of 0.1-5.0 μg/L and 0.1-10.0 μg/L, the diffraction peak displacement of MIPPs for BPA and DCD was obvious, the maximum displacement was 39 and 31 nm, and the limits of detection were 0.051 μg/L and 0.038 μg/L(S/N=3), respectively. However, the diffraction peak displacement of the non-imprinted photonic crystal film was not obvious, which indicated that the prepared MIPPs had selective specificity. The real sample test results showed that the development MIPPs had an obvious optical signal response to the target molecules, which could be used for the rapid, sensitive and selective detection of the residual BPA and DCD in environmental waters.
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Keywords:
- Molecular imprinting,
- Photonic crystal,
- Sensor array,
- Bisphenol A,
- Dicandiamide
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