1. Precursors of Magnetic Resonance Imaging Contrast Agents Based on Cystine-coated Iron-oxide Nanoparticles
- Author
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Guido Pampaloni, Anton Gradišek, Carlo Alberto Veracini, Zvonko Jagličić, Mario Cifelli, Maja Remškar, Sara Dolci, Valentina Domenici, Vincenzo Ierardi, and Tomaz Apih
- Subjects
Materials science ,nanoparticle ,Relaxation (NMR) ,Nanoparticle ,Combinatorics ,Paramagnetism ,chemistry.chemical_compound ,Nuclear magnetic resonance ,chemistry ,Proton NMR ,Surface modification ,MRI ,Molecular imaging ,High-resolution transmission electron microscopy ,Iron oxide nanoparticles ,Earth-Surface Processes - Abstract
Super Paramagnetic Iron-Oxide Nanoparticles (SPION) are currently used as magnetic resonance imaging (MRI) contrast agents. The functionalization of their surface with organic and biocompatible molecules has the purpose to produce carriers selective for different tissues and organs. In this paper, we present the preparation of new cystine-coated ultra small super paramagnetic iron-oxide nanoparticles (USPION) of different core size, from 4 nm to 11 nm. The physical-chemical characterization of these nanoparticles was performed by using several experimental techniques, such as atomic force microscopy (AFM), high resolution transmission electron microscopy (HRTEM) and magnetic measurements. 1 H NMR relaxation times at different magnetic field strengths have been measured for several water- dispersions of cystine-coated iron-oxide nanoparticles of the smallest dimensions (4 nm). These preliminary results confirm their potentialities as molecular imaging probes and MRI contrast agents.
- Published
- 2013
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