Functionalized europium nanorods for in vitro imaging

Ka Leung Wong, Ga Lai Law, Margaret B. Murphy, Peter A. Tanner, Wing Tak Wong, Paul Kwan Sing Lam, Michael Hon Wah Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

70 Citations (Scopus)

Abstract

Emissive europium hydroxide nanorods (ENR) (20 nm x 500 nm) functionalized by a surface coating of chromophore-containing organically modified silicate (ORMOSIL) layer, have been synthesized and characterized by high-resolution transmission electron microscopy (TEM). Low-temperature photophysical characterization of the functionalized nanorods (FENR) demonstrated a strong red 5D0 luminescence both in solid and in suspended solutions. Potentials of this nanorod material for live cell imaging have also been explored. Both the bare and functionalized nanorods are able to enter living human cells with no discernible cytotoxicity. Chromophore-to-Eu 3+ energy-transfer in the functionalized nanorods enables staining of the cytoplasm of living human cells. This is confirmed by costaining with fluorescent dextran. The red chromophore-sensitized luminescence from the internalized nanorods in live human lung carcinoma cells (A549) can be observed by confocal microscopy 2 h after loading and reaches maximal emission after 24 h.
Original languageEnglish
Pages (from-to)5190-5196
Number of pages7
JournalInorganic Chemistry
Volume47
Issue number12
DOIs
Publication statusPublished - 16 Jun 2008
Externally publishedYes

ASJC Scopus subject areas

  • Inorganic Chemistry

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