Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 439, Issue -, Pages 151-158Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2012.12.036
Keywords
Chitosan; Nanoparticles; Silver; Gold; Core-shells
Categories
Funding
- NATO project [CBP.MD.CLG982316]
- bilateral cooperation of Ministere de la Recherche Scientifique, (Tunisia)
- GRICES (Portugal)
- FCT post-doctoral grant [SFRH/BPD/26239/2006]
Ask authors/readers for more resources
Silver and gold nanoparticles (NPs) were generated via a mild wet-chemistry process in aqueous chitosan solutions. Gold and silver NPs were created in situ in presence of chitosan through the addition of the corresponding salt solution under a subsequent UV irradiation. Gold and silver NPs were also created by using a sequence of gold and then silver and vice versa. The amine function existing in the chain monomer operates as the anchoring centre of the metal NP, enabling thus a selective generation of the metal NPs through their nucleation followed by their growth. Ensuing hybrid systems were characterized by UV/vis spectroscopy, X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and Grazing Incident X-ray Diffraction (GIXRD). The NPs average sizes ranges from 10 to 40 nm for gold and 20 to 100 nm for silver. XPS studies on NPs generation through a sequence of gold followed by silver solutions suggest that gold cores enveloped by silver shells with some discontinuities exist. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available