Abstract
New bifunctional and bimodal nanoparticles (NPs) have been elaborated and characterised. They are based on silica NPs that incorporate a silylated ruthenium tris-bipyridine complex. The resulting suspension of amine-modified NPs with diameters of 20 nm was post-functionalised with a stable gadolinium ion complex. Interest in these NPs lies mainly in the confinement of optical and magnetic imaging agents (Ru and Gd complexes, respectively) within the NP volume. Their potential use as a bimodal probe (luminescence/magnetic resonance imaging) and theranostic agent (photodynamic therapy/imaging) is described. The biological potential of these NPs has been studied on HCT-116 cells and microscopy and cytotoxicity results are given.
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