Abstract:
Metal nanoparticles possess very useful catalytic, magnetic, electronic,
optical etc. properties. Investigations have indicated when a metal was
associated with another metal in bimetallic or alloy form, the properties of
resulting material could be enhanced with respect to those of the pure metals.
For example, nickel- based bimetallic particles containing copper exhibit
better catalytic activity and selectivity than monometallic nickel. In addition,
bimetallic nanoparticles possess very useful multi-functionalities. Nickel
core-Silver shell composite nanoparticles possess not only magnetic
properties of nickel but also antibacterial properties of silver. Because of
many useful novel applications, synthesis of bimetallic nanoparticles has
been gaining greater attention. In this study, polyol method has been used to
synthesize copper core-silver shell composite nanoparticles. Microwave
irradiation was used for heating. The ultimate goal is to incorporate these
core-shell bimetallic composite into acrylic-based environment friendly
emulsion for shielding from electro magnetic radiation (EMR). Application
of this type of conductive coating on touch panels, cell phones etc. makes
them function without any interference from EMR. Synthesis,
characterization and applications of bimetallic Cu core-Ag shell are
discussed.
