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The iron-nickel-molybdenum (Fe-Ni-Mo) electrodeposited alloy on n-type silicon

Fekih Z., Ghellai N., Sam S., Chabanne-Sari N., Gabouze N.

Advances in Materials Science

2012

Vol. 12, nr 1(31)

17-26

In the present work, the electrodeposition of iron-nickel-molybdenum (Fe-Ni-Mo) alloy on n-type silicon (Si) is investigated. A voltamperometric study has been carried out. According to the composition of the solution and of its pH, the properties of final deposit have been investigated and analyzed by X-rays diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Under our conditions an amorphous FeNiMo alloy was formed. The morphology of deposited layer was strongly influenced by the polarization and the molybdenum dominance in the final chemical composition of the deposited film. Moreover, high percentages of molybdenum can be obtained from high molybdate concentrations and grain size increase with increasing Mo concentration. We also noticed that an absence of nickel was accomplished by applying more negative potential.

Temperature measurement using a Chx/porous silicon/Si structure encapsulated in a CO2 rich environment

Chiali A., Ghellai N., Gabouze N., Sari N.

Advances in Materials Science

2010

Vol. 10, nr 2(24)

4-10

This work reports on the possible use of microporous silicon as a temperature sensor. This work is based on previous published works [7, 8, and 9]. The device is based on hydrocarbon group (CHx) / porous silicon (PS) /Si structure. The porous sample was coated with hydrocarbons groups deposited by the plasma of methane /argon mixture. Current–voltage characteristics have been investigated as a function of temperature in the range 200C-70°C.The results show that for a constant voltage in the range 0.7-1V, the current increases linearly with the environment temperature reaches a maximum at 70°C and then stabilizes. This result suggests that the developed structure can be used for sensing temperatures not exceeding 70°C.