Reference : Coating of gold nanoparticles by thermosensitive poly(N-isopropylacrylamide) end-capp...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/6534
Coating of gold nanoparticles by thermosensitive poly(N-isopropylacrylamide) end-capped by biotin
English
Aqil, Abdelhafid mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Qiu, Hongjin [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Greisch, Jean-François [Unversity of Liège (ULg) > Department of Chemistry > Mass Spectrometry Laboratory > >]
Jérôme, Robert mailto [University of Liège (ULg) > Depatment of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
De Pauw, Edwin mailto [University of Liège (ULg) > Department of Chemistry > Mass Spectrometry Laboratory > >]
Jérôme, Christine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
3-Mar-2008
Polymer
Elsevier Science
49
5
1145-1153
Yes (verified by ORBi)
International
0032-3861
Oxford
United Kingdom
[en] nanostructured material ; smart colloid ; metal nanoparticle ; coating ; stimuli-responsive polymer ; temperature-responsive polymer ; stimuli responsive nanoparticle
[en] Gold nanoparticles (NPs) were prepared by reduction of HAuCl4 in aqueous solution and stabilized by poly(N-isopropylacrylamide) (PNIPAM). PNIPAM was prepared by two distinct routes: (i) conventional free-radical polymerization leading to polymer without any reactive end-group, and (ii) Reversible Addition–Fragmentation chain Transfer (RAFT) polymerization with 2-dodecylsulfanylthiocarbonylsulfanyl-2-methyl propionic acid (DMP) as a RAFT agent. PNIPAM with low polydispersity was then end-capped by an α-carboxylic acid and an ω-trithiocarbonate that was converted into an ω-thiol upon hydrolysis. This hetero-telechelic polymer was analyzed by mass spectroscopy, size exclusion chromatography (SEC) and 1H NMR. Even without thiol end-group, known for chemisorption onto gold, PNIPAM was effective in stabilizing gold NPs (1–5 nm). The thermosensitivity of PNIPAM at the surface of gold NPs was, however, dependent on the molecular weight of the chains. Finally, the α-carboxyl end-group of PNIPAM was used to anchor biotin, which is indeed known for complexation with avidin, which is a possible strategy for the coated gold NPs to be involved as building blocks in supramolecular assemblies. TEM and UV–vis spectroscopy were used to characterize the gold nanoparticles.
Center for Education and Research on Macromolecules (CERM)
The "Région Wallonne" in the frame of the ‘‘NOMADE’’ program ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers
http://hdl.handle.net/2268/6534
10.1016/j.polymer.2007.12.033
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TXW-4RH94X0-1-W&_cdi=5601&_user=532038&_orig=browse&_coverDate=03%2F03%2F2008&_sk=999509994&view=c&wchp=dGLbVtz-zSkWA&md5=d75599c7c16cebcaef474736f287173f&ie=/sdarticle.pdf
http://www.elsevier.com/wps/find/journaldescription.cws_home/30466/description#description
The authors acknowledge Polymer (Elsevier) for allowing them to archive this paper.

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