• DOI:10.1186/1556-276X-9-558
• Corpus ID: 17876541

Facile synthesis of folate-conjugated magnetic/fluorescent bifunctional microspheres

@article{Shen2014FacileSO,
  title={Facile synthesis of folate-conjugated magnetic/fluorescent bifunctional microspheres},
  author={Mao Shen and Wenping Jia and Caiping Lin and Guodong Fan and Yangmin Jin and Xiaoying Chen and Guang Chen},
  journal={Nanoscale Research Letters},
  year={2014},
  volume={9},
  pages={558 - 558}
}

• Mao Shen, Wenping Jia, +4 authors Guang Chen
• Published 8 October 2014
• Materials Science, Chemistry
• Nanoscale Research Letters

In this paper, we investigated the functional imaging properties of magnetic microspheres composed of magnetic core and CdTe quantum dots in the silica shell functionalized with folic acid (FA). The preparation procedure included the preparation of chitosan-coated Fe3O4 nanoparticles (CS-coated Fe3O4 NPs) prepared by a one-pot solvothermal method, the reaction between carboxylic and amino groups under activation of NHS and EDC in order to obtain the CdTe-CS-coated Fe3O4 NPs, and finally the growth of SiO2 shell vent the photoluminescence (PL) quenching via a Stöber method (Fe3O4-CdTe@SiO2). Moreover, in order to have a specific targeting capacity, the magnetic and fluorescent bifunctional microspheres were synthesized by bonding of SiO2 shell with FA molecules via amide reaction (Fe3O4-CdTe@SiO2-FA). The morphology, size, chemical components, and magnetic property of as-prepared composite nanoparticles were characterized by ultraviolet-visible spectroscopy, fluorescent spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), scanning transmission electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM), respectively. The results show that the magnetic and fluorescent bifunctional microspheres have strong luminescent which will be employed for immuno-labeling and fluorescent imaging of HeLa cells.