Sains Malaysiana 40(9)(2011): 1019–1022
Kesan Kepekatan Glukopon 215 Csup Terhadap
Saiz dan Sifat Magnet Nanozarah Co-Ni-Cu yang Disediakan dengan Kaedah
Elektropengendapan
(Effects of Glucopone
215 Csup Concentration on Size and Magnetic
Property of Co-Ni-Cu
Nanoparticles
Prepared by Electrodeposition Method)
Abdul Razak Daud*, Setia Budi
& Shahidan Radiman
Pusat
Pengajian Fizik Gunaan, Fakulti Sains dan Teknologi, Universiti Kebangsaan
Malaysia
43600
UKM Bangi, Selangor, Malaysia
Diserahkan:
16 Jun 2010 / Diterima: 7 Januari 2011
ABSTRAK
Nanozarah Co-Ni-Cu telah
disediakan dengan kaedah elektropengendapan pada keupayaan pengendapan -925 mV
(SCE)
menggunakan larutan sulfat (0.018M Co2++ 0.180M Ni2+ + 0.002M
Cu2+) yang mengandungi surfaktan Glukopon 215 CSUP dan juga tanpa surfaktan. Kesan kepekatan surfaktan terhadap saiz
dan sifat magnet nanozarah Co-Ni-Cu yang terhasil telah dikaji. Analisis
morfologi permukaan endapan yang diperoleh dilakukan dengan menggunakan
mikroskop elektron imbasan pancaran medan (FESEM)
manakala sifat magnetnya diselidiki dengan menggunakan magnetometer getaran
sampel (VSM). Nanozarah Co-Ni-Cu yang disediakan daripada larutan
yang mengandungi Glukopon 215 CSUP didapati berbentuk sfera
dengan saiz berskala nanometer. Saiz zarah paling kecil ialah lebih kurang 50
nm, diperoleh pada kepekatan surfaktan 5 %v, iaitu kepekatan paling tinggi yang
dikaji dalam kajian ini. Kepaksaan (Hc) didapati lebih tinggi pada
sampel yang disediakan daripada elektrolit yang mengandungi surfaktan
berbanding tanpa surfaktan.
Kata kunci:
Elektropengendapan; nanozarah Co-Ni-Cu; sifat magnet; surfaktan
ABSTRACT
Co-Ni-Cu nanoparticles were
prepared by electrodeposition method at co-deposition potential of -925 mV (SCE)
from sulphate solution (0.018M Co2++ 0.180M Ni2+ +
0.002M Cu2+), both in the presence and in the absence of
surfactant, Glucopone 215 CSUP. The effect of surfactant
concentration on size and magnetic properties of Co-Ni-Cu nanoparticles produced
was investigated. Surface morphology was analyzed using a field emission
scanning electron microscope (FESEM) while its magnetic
properties were investigated by a vibrating sampel magnetometer (VSM).
Co-Ni-Cu nanoparticles prepared from the Glucopone 215 CSUP-
containing solution were spherical with nanometer size. The finest particles
were about 50 nm obtanied when 5 v% of surfactant was used which was the
highest surfactant concentration studied in this work. Coercivity (Hc)
of the samples prepared from electrolytes containing surfactant was higher than
those of prepared without surfactant.
Keywords: Co-Ni-Cu nanoparticles; electrodeposition; magnetic
properties; surfactant
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*Pengarang
untuk surat-menyurat; email: ard@ukm.my
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