Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Polymer mediated formation of corona-embedded gold nanoparticles in block polyelectrolyte micelles
Δημιουργός/Συγγραφέας:	Meristoudi, Anastasia [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios
Εκδότης:	Elsevier Ltd.
Τόπος έκδοσης:	OXFORD
Ημερομηνία:	2009-06-19
Γλώσσα:	Αγγλικά
ISSN:	0032-3861
DOI:	10.1016/j.polymer.2009.04.045
Περίληψη:	Micelles having a hydrophobic core of poly(tert-butylstyrene) and a hydrophilic corona of poly(sodium sulfamate/carboxylate-isoprene) anionic polyelectrolyte, were formed through self-assembly of the diblock copolymer poly[tert-butylstyrene-b-sodium (sulfamate/carboxylate-isoprene)] (BS-SCI) in water. HAuCl(4), as the metal precursor, was preferentially dissolved and coordinated into the corona of the micelles. Au nanoparticles were formed within the corona block by Subsequent reduction of Au(3+) to Au(0) without introducing any reducing agent, since the amine group of the corona block acts as both the reducing and stabilizing agent. The kinetics of the Au reduction reaction was followed by UV-vis spectroscopy by direct observation of the exact position and the intensity of the surface plasmon resonance band of created Au nanoparticles. The colloidal stability and structural response of the BS-SCI/Au nano-hybrid was studied as a function of pH, ionic strength and temperature by dynamic light scattering (DLS). Additional information on the structure of the hybrid systems and the metal nanoparticle characteristics were gathered by UV-vis spectroscopy, atomic force microscopy (AFM) and transmission electron microscopy (TEM). Taking into account the polyelectrolyte nature and biocompatibility of the SCI corona of the BS-SCI/Au nanoassembly, the interactions with a model globular protein (lysozyme) were investigated, aiming at exploring the potential application of such hybrid colloids in protein assay protocols.
Τίτλος πηγής δημοσίευσης:	Polymer (incorporating Computational and Theoretical Polymer Science)
Τόμος/Κεφάλαιο:	50
Τεύχος:	13
Σελίδες:	2743-2751
Λέξεις-Κλειδιά:	Block copolymer micelles Metal nanoparticles Nanoparticle formation kinetics Polymer Science
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2009 Elsevier Ltd. All rights reserved.
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www.elsevier.com/locate/polymer
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο