ORBi: Liu Ji - Preparation and characterization of thermo-responsive gold nanohybrids

Reference : Preparation and characterization of thermo-responsive gold nanohybrids


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/2268/124424

Title :	Preparation and characterization of thermo-responsive gold nanohybrids
Language :	English
Author, co-author :	Liu, Ji [Institut de Chimie de la Matière Consensée de Bordeaux and University of Liège (ULg) > Department of Chemistry of Liège > Center for Education and Research on Macromolecules (CERM, Liège) > >]
	Hurtgen, Marie [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Detrembleur, Christophe [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Mornet, Stephan [Institut de Chimie de la Matière Consensée de Bordeaux > > > >]
	Jérôme, Christine [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Duguet, Etienne [Institut de Chimie de la Matière Consensée de Bordeaux > > > >]
Publication date :	25-Oct-2011
On invitation :	No
Audience :	International
Event name :	International Symposium on Stimuli-Responsive Materials
Event date :	24/10/2011 - 25/10/2011
Event organizer :	Marek Urban
Event place (city) :	Hattiesburg
Event country :	USA
Keywords :	[en] metal nanoparticle ; stimuli-responsive polymer ; temperature-responsive polymer
Abstract :	[en] Stimuli-responsive nano-materials have been playing increasingly important roles in the biomedical field due to their ability to alter the physico-chemical properties in response to external stimuli, such as temperature, pH, ionic strength, magnetic field, etc. Nanohybrids bearing an inorganic core and thermo-responsive polymer shell are particularly applicable in target delivery and controlled drug release. Poly (N-vinylcaprolactam) (PNVCL) and its copolymers, exhibiting lower critical solution temperature (LCST) where the transition between hydrophilic and hydrophobic state happens, is one of the optimal choices for this core/shell structure. Here we present the in-situ fabrication of thermo-responsive gold nanohybrids coated with a novel poly(vinyl alcohol)-b-poly(N-vinylcaprolactam) (PVOH-b-PNVCL) block copolymer prepared by the cobalt-mediated radical polymerization (CMRP). The interaction between both PVOH and PNVCL segments and gold nanoparticles was confirmed by FT-IR spectra. A sharp thermo-induced phase transition with a good reversibility upon change in temperature was detected by DLS and UV/vis spectrometer. Furthermore, the presence of hydrophilic PVOH moieties endows the gold nanohybrids with improved colloidal stability above LCST without any flocculation detected, compared with the gold nanoparticles stabilized with PNVCL homopolymer. This kind of gold nanohybrids can be envisaged as a new drug delivery vehicle.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	the "IDS-FUNMAT" erasmus-mundus program ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/124424
Commentary :	This poster was presented by Ji Liu

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