Meital Shviro and David Zitoun*
Department of Chemistry, Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Ramat Gan 52900, Israel
to the article
ABSTRACT: We report on the synthesis of Ni/Ag heterogeneous nanocrystals. Ag
almost exclusively nucleates on the vertices of Ni nanopyramids and vertices and edges
of Ni nanocubes. The synthesis is carried on using the decomposition of an
organometallic Ni precursor to achieve a shape control (cubes and pyramids) followed
by a nonaqueous galvanic replacement reaction of Ag(I). The colloids exhibit both
plasmonic resonance and superparamagnetic behavior. Interestingly, the bimetallic
nanocrystals display a magnetic moment higher than the pristine Ni nanocrystals,
suggesting a specific magnetic polarization of the Ni/Ag interface or silver tips.