TY - JOUR
T1 - Bimetallic Cu-Ni nanoparticles of varying composition (CuNi3, CuNi, Cu3Ni)
AU - Ahmed, Jahangeer
AU - Ramanujachary, Kandalam V.
AU - Lofland, Samuel E.
AU - Furiato, Anthony
AU - Gupta, Govind
AU - Shivaprasad, S. M.
AU - Ganguli, Ashok K.
N1 - Funding Information:
The authors thank the Department of Science and Technology, CSIR, Govt. of India, and IIT Delhi for financial assistance. SEL acknowledges support from NSF DMR 0520471, and NSF DMR 0603644.
PY - 2008/12/31
Y1 - 2008/12/31
N2 - Cu-Ni (1:3, 1:1, 3:1) bimetallic nanoparticles have been synthesized by a microemulsion route using CTAB (cetyltrimethyl ammoniumbromide) as the surfactant and hydrazine/NaOH as the precipitating agent followed by reduction in hydrogen atmosphere. This is the first report of the synthesis of CuNi3 and Cu3Ni nanoparticles. Transmission electron microscopy (TEM) studies show nearly monodisperse and uniform nanoparticles of average grain size of 7 nm for the 1:1 alloy nanoparticles while the 1:3 and 3:1 compositions show uniform nanoparticles with the grain size in the range of 20-30 nm. X-ray photoelectron spectroscopy (XPS) studies confirm the expected Cu/Ni ratios in these alloys. These bimetallic nanoparticles show ferromagnetic behavior and the magnetization decreases with increase in concentration of copper. The specific surface area of these alloy nanoparticles was found to be in the range of 6-9.42 m2/g.
AB - Cu-Ni (1:3, 1:1, 3:1) bimetallic nanoparticles have been synthesized by a microemulsion route using CTAB (cetyltrimethyl ammoniumbromide) as the surfactant and hydrazine/NaOH as the precipitating agent followed by reduction in hydrogen atmosphere. This is the first report of the synthesis of CuNi3 and Cu3Ni nanoparticles. Transmission electron microscopy (TEM) studies show nearly monodisperse and uniform nanoparticles of average grain size of 7 nm for the 1:1 alloy nanoparticles while the 1:3 and 3:1 compositions show uniform nanoparticles with the grain size in the range of 20-30 nm. X-ray photoelectron spectroscopy (XPS) studies confirm the expected Cu/Ni ratios in these alloys. These bimetallic nanoparticles show ferromagnetic behavior and the magnetization decreases with increase in concentration of copper. The specific surface area of these alloy nanoparticles was found to be in the range of 6-9.42 m2/g.
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U2 - 10.1016/j.colsurfa.2008.08.007
DO - 10.1016/j.colsurfa.2008.08.007
M3 - Article
AN - SCOPUS:56249098299
SN - 0927-7757
VL - 331
SP - 206
EP - 212
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 3
ER -