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Bioinspired surface immobilization of hyaluronic acid on monodisperse magnetite nanocrystals for targeted cancer imaging

  • Yuhan Lee
  • , Haeshin Lee
  • , Young Beom Kim
  • , Jaeyoon Kim
  • , Taeghwan Hyeon
  • , Hyunwook Park
  • , Phillip B. Messersmith
  • , Tae Gwan Park

Research output: Contribution to journalArticlepeer-review

318 Scopus citations

Abstract

A mussel-inspired method for homogeneous and robust coating of hyaluronic acid (HA) on monodisperse magnetite nanocrystals in aqueous solution with a cancer targeting capability through CD44-HA receptor-ligand interactions was reported. HA-dopamine conjugates (HA-DN) were prepared using conventional 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC)/1-hydoxybenzotriazole (HOBT) chemistry in pH 5.5 solution to avoid irreversible oxidation of dopamine. The homogeneous coating with HA-DN was achieved by adding a solution of nanocrystals into the HA-DN solution with vortexing for 1 minute. Atomic Force Microscopy images demonstrated homogeneous coating of HA-DN on the surface of the magnetite nanocrystals. High-resolution x-ray photoelectron spectra confirmed the presence of HA-DN, the binding energy of the quaternary nitrogen in CTAB was different from that of nitrogens in N-acetyl and amide groups in HA-DN.

Original languageEnglish
Pages (from-to)4154-4157
Number of pages4
JournalAdvanced Materials
Volume20
Issue number21
DOIs
StatePublished - Nov 3 2008
Externally publishedYes

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