title: Hyperbranched polymer mediated size-controlled synthesis of gadolinium phosphate nanoparticles: colloidal properties and particle size-dependence on MRI relaxivity.
abstract: Hyperbranched polymers based on the poly(amidoamine), HyPAM, were used to synthesize gadolinium phosphate nanowires under mild conditions. Control of the average particle size was obtained by adjusting polymer concentration. Proton relaxivity measurements reveal an optimum particle size, reaching relaxivity values as high as 55 ± 9 mM(-1) s(-1) for r1 and 67 ± 11 mM(-1) s(-1) for r2. The colloidal stability of these hybrid systems were optimized through the use of functionalized core-shell polymers containing PEG segments and C18-PEG segments, structures which also offer the possibility of imparting additional function into the polymer-particle hybrids.
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Camille
authors.initials: C
authors.lastname: Frangville
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Maylis
authors.initials: M
authors.lastname: Gallois
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA. talham@chem.ufl.edu.
authors.forename: Yichen
authors.initials: Y
authors.lastname: Li
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Hong Hanh
authors.initials: HH
authors.lastname: Nguyen
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Nancy
authors.initials: N
authors.lastname: Lauth-de Viguerie
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA. talham@chem.ufl.edu.
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Talham
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Christophe
authors.initials: C
authors.lastname: Mingotaud
authors.affiliation: Laboratoire IMRCP, Université de Toulouse, CNRS UMR 5623, UPS, 31062 Toulouse, France. marty@chimie.ups-tlse.fr.
authors.forename: Jean-Daniel
authors.initials: JD
authors.lastname: Marty