Folate-conjugated Fe3O4@SiO2@gold nanorods@mesoporous SiO2 hybrid nanomaterial: A theranostic agent for magnetic resonance imaging and photothermal therapy

Da Wei Wang, Xiao Ming Zhu, Siu Fung Lee, Ho Man Chan, Hung Wing LI, Siu Kai Kong, Jimmy C. Yu, Christopher H.K. Cheng*, Yi Xiang J. Wang, Ken C F LEUNG

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


In this paper, we investigated the functional imaging and targeted therapeutic properties of core@multi-shell nanoparticles composed of a superparamagnetic iron oxide (SPIO) core and gold nanorods (GNRs) in the mesoporous silica shells functionalized with folic acid (Fe3O 4@SiO2@GNRs@mSiO2-FA). The as-synthesized five-component hybrid nanocomposite was revealed to have insignificant cytotoxicity. Intracellular uptake of the nanoparticles was studied in the folate receptor over-expressing human epidermoid carcinoma of the nasopharynx (KB) cells. Due to their magnetic/optical properties as well as the folate targeting potential, compared with Fe3O4@SiO 2@GNRs@mSiO2 nanoparticles, higher cellular uptake efficiency was observed for Fe3O4@SiO 2@GNRs@mSiO2-FA nanoparticles in KB cells. Characterizations were achieved using both dark field and magnetic resonance (MR) imaging techniques. The hyperthermia induced by Fe3O 4@SiO2@GNRs@mSiO2-FA nanoparticles resulted in a higher cytotoxicity in KB cells. Thus, the Fe3O 4@SiO2@GNRs@mSiO2-FA hybrid nanomaterial is an effective and promising MR imaging and photothermal therapy agent for folate-receptor over-expressing cancer cells.

Original languageEnglish
Pages (from-to)2934-2942
Number of pages9
JournalJournal of Materials Chemistry B
Issue number23
Publication statusPublished - 21 Jun 2013

Scopus Subject Areas

  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)


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