Arora, Varun and Sood, Ankur and Shah, Jyoti and Kotnala, R. K. and Jain, Tapan K. (2016) Synthesis and characterization of thiolated pectin stabilized gold coated magnetic nanoparticles. Materials Chemistry and Physics , 173. pp. 161-167. ISSN 0254-0584

PDF - Published Version Restricted to Registered users only Download (1582Kb) | Request a copy

Abstract

Core-shell nanoparticles, magnetic core and gold shell, were synthesized by reduction of gold chloride on the surface of magnetic nanoparticles; using tyrosine as a reducing agent. The formation of gold shell on magnetic nanoparticles was confirmed by X-ray diffraction (XRD) and UV-Visible spectroscopy. The core-shell nanoparticles (CSn) were conjugated with thiolated pectin to form a stable aqueous dispersion. The hydrodynamic size of thiolated pectin stabilized core-shell nanoparticles (TP-CSn) measured by Dynamic light scattering (DLS) was 160.5 nm with a poly dispersity index (PDI) of 0.302, whereas the mean particle size of TP-CSn calculated by high resolution transmission electron microscopy (HRTEM) was 10.8 +/- 2.7 nm. The value of zeta potential for TP-CSn was -13.6 mV. There was a decrease in the value of saturation magnetization upon formation of the gold shell on magnetic nanoparticles. The amount of thiolated pectin bound to the surface of core-shell nanoparticles, calculated using Thermogravimetric analysis (TGA), was 6% of sample weight.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Uncontrolled Keywords:	Nanostructures Composite materials Magnetic properties Polymers Electron microscopy Surface properties
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	20 Apr 2018 11:18
Last Modified:	20 Apr 2018 11:18
URI:	http://npl.csircentral.net/id/eprint/2388

Actions (login required)

View Item