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Analytical biochemistry v.538, 2017년, pp.26 - 33   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Fluorescence and magnetic nanocomposite Fe3O4@SiO2@Au MNPs as peroxidase mimetics for glucose detection

Luo, Shajie (College of Science, Sichuan Agricultural University, Ya'an 625014, China ) ; Liu, Yaqin (College of Science, Sichuan Agricultural University, Ya'an 625014, China ) ; Rao, Hanbing (College of Science, Sichuan Agricultural University, Ya'an 625014, China ) ; Wang, Yanying (College of Science, Sichuan Agricultural University, Ya'an 625014, China ) ; Wang, Xianxiang (College of Science, Sichuan Agricultural University, Ya'an 625014, China ) ;
  • 초록  

    Abstract In this paper, multifunction nanoparticles (MNPs), Fe 3 O 4 @SiO 2 @Au MNPs, with properties of superparamagnetism, fluorescence and peroxidase-like catalytic activity were synthesized in the aqueous phase. The synthesized composites were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier translation infrared spectrum (FT-IR) and fluorometer. The results show that the multifunctional nanomaterials have good magnetic and fluorescence properties. Then, the mimetic properties of this material were investigated. The as-synthesized Fe 3 O 4 @SiO 2 @Au MNPs exhibited the best catalytic activity for peroxidase substrate 3,3,5,5-tetramethylbenzidine (TMB) at the reaction temperature of 70 °C and pH of 3. Compared with free Fe 3 O 4 MNPs and BSA-Au nanoclusters (NCs), the composites have better catalytic activity at higher temperature and lower pH, indicating that Fe 3 O 4 @SiO 2 @Au MNPs can work in more severe environment. In practical application, we have successfully established the colorimetric method for the detection of H 2 O 2 and glucose with the detection range of 1 × 10 −6 ∼ 4 × 10 −5 M and 5 × 10 −6 ∼ 3.5 × 10 −4 M, and the detection limit of 6 × 10 −7 M and 3.5 × 10 −6 M, respectively. The method was also successfully applied in the detection of real samples. Furthermore, since the fluorescence of Fe 3 O 4 @SiO 2 @Au MNPs was quenched by H 2 O 2 , a method for the visual detection of glucose was established. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Fe3O4@SiO2@Au MNPs .   Peroxidase .   H2O2 .   Glucose .   Detection.  

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