TY - JOUR
T1 - Protective agent-free synthesis of Ni-Ag core-shell nanoparticles
AU - Chen, Dong Hwang
AU - Wang, Shiuann Ren
N1 - Funding Information:
This work was performed under the auspices of the National Science Council of the Republic of China, under contract number NSC 90-2214-E006-009, to which the authors wish to express their thanks.
PY - 2006/12/10
Y1 - 2006/12/10
N2 - Ni-Ag core-shell nanoparticles have been prepared by successive hydrazine reduction in ethylene glycol in the absence of protective agents. TEM analysis indicated the product was very fine and the thickness of Ag nanoshells could be controlled by the added silver nitrate concentration. The analyses of electron diffraction pattern and XRD revealed that both Ni cores and Ag shells had a fcc structure. The surface composition analysis by XPS indicated that Ni cores were fully covered by Ag nanoshells. Because of the absence of protective agent, the appropriate nickel concentration for the coating of Ag nanoshells should be less than 1.0 mM to avoid particle agglomeration. The product possessed the surface character of Ag and the magnetic property of Ni, and may have many potential applications in optical, magnetic, catalytic, biochemical, and biomedical fields.
AB - Ni-Ag core-shell nanoparticles have been prepared by successive hydrazine reduction in ethylene glycol in the absence of protective agents. TEM analysis indicated the product was very fine and the thickness of Ag nanoshells could be controlled by the added silver nitrate concentration. The analyses of electron diffraction pattern and XRD revealed that both Ni cores and Ag shells had a fcc structure. The surface composition analysis by XPS indicated that Ni cores were fully covered by Ag nanoshells. Because of the absence of protective agent, the appropriate nickel concentration for the coating of Ag nanoshells should be less than 1.0 mM to avoid particle agglomeration. The product possessed the surface character of Ag and the magnetic property of Ni, and may have many potential applications in optical, magnetic, catalytic, biochemical, and biomedical fields.
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U2 - 10.1016/j.matchemphys.2006.01.027
DO - 10.1016/j.matchemphys.2006.01.027
M3 - Article
AN - SCOPUS:33750052617
VL - 100
SP - 468
EP - 471
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
IS - 2-3
ER -