PREPARATION OF GOLD NANOPARTICLES STABILIZED BY CHITOSAN USING IRRADIATION AND SONICATION METHODS

Abstract

Gold nanoparticles (AuNPs) were synthesized, in the absence of any reducing agent, using ionizing radiation or ultrasound in aqueous solutions of chloroauric acid (HAuCl4). Chitosan (average molecular weight 158 kDa, degree of deacetylation 90 %) was used as a stabilizing agent. Both techniques yielded AuNPs which were stable in solution at RT for at least 3 months after synthesis. UV-Vis spectroscopy was used to follow substrate decay, nanoparticles formation, size of the gold core and particles stability. Hydrodynamic radii and polydispersion of the chitozan-stabilized AuNPs (i.e. the whole core-shell nanoparticles) were determined by dynamic light scattering. Zeta potential measurements were performed to assess the surface charge and stability of the particles. Influence of synthesis parameters and presence of isopropanol on the formation and properties of the products have been described and reaction mechanisms have been discussed. Radiation and sonochemical methods are demonstrated to be very efficient, fast and easy-to-control methods of synthesizing gold nanoparticles, leaving behind no unreacted reducing agent or unwanted side products, while stabilization by chitosan provides AuNPs with excellent stability and long shelf life.

Authors and Affiliations

Renata Czechowska-Biskup, Bożena Rokita, Piotr Ulański, Janusz M. Rosiak

Keywords

Related Articles

THE INFLUENCE OF C18-FATTY ACIDS ON CHEMICAL STRUCTURE OF CHITOSAN DERIVATIVES AND THEIR THERMAL PROPERTIES

Chitosan derivatives with a series of fatty acids (FA) have been developed using simultaneous N- and O-acylation reaction by the combination of two ways of conducting the reaction, i.e. a carbodiimide catalysis and ionic...

CHITOSAN AND CHITOSAN-POLYETHYLENIMINE MICROSPHERES PREPARED BY MEMBRANE EMULSIFICATION AND THEIR APPLICATION FOR DRUG DELIVERY SYSTEMS

The aim of this paper was to prepare chitosan microspheres characterised by a narrow dispersion of dimensions, suitable for application for drug delivery systems (DDS). The materials, unmodified as well as functionalised...

CHARACTERISATION OF CHITOSAN AFTER CROSS-LINKING BY TANNIC ACID

Chitosan is widely applied in biomedical and cosmetic fields. For this reason, there is a need to modify this biopolymer to achieve new properties of chitosan-based materials. The properties of chitosan can be modified b...

THE INFLUENCE OF CHITOSAN DEACETYLATION DEGREE ON REACTIVE BLACK 5 SORPTION EFFICIENCY FROM AQUEOUS SOLUTIONS

In the paper sorption capacity of chitosan having a deacetylation degree DD=75%, DD=85% and DD=90% relatively to the Reactive Black 5 were compared. Studies on the effectiveness of the dye sorption were carried out in a...

SENSITIVITY TO CHITOSAN ASCORBATE MICROAEROPHILIC BACTERIA ISOLATED FROM INFECTIONS OF ORAL CAVITY

The aim of the date was to determine the sensitivity to chitosan ascorbate microaerophilic bacteria isolated from pathological pockets, root canals and apical abscesses. Chitosan was obtained from Antarctic krill. The ex...

Download PDF file
  • EP ID EP73309
  • DOI 10.15259/PCACD.20.02
  • Views 105
  • Downloads 0

How To Cite

Renata Czechowska-Biskup, Bożena Rokita, Piotr Ulański, Janusz M. Rosiak (2015). PREPARATION OF GOLD NANOPARTICLES STABILIZED BY CHITOSAN USING IRRADIATION AND SONICATION METHODS. Progress on Chemistry and Application of Chitin and its Derivatives, 0(), 18-33. https://europub.co.uk/articles/-A-73309