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Papers by Author: Shamsul Faez M. Yusop

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I-V and Surface Topography Study of Nanostructure Porous Silicon Layer Prepared by Electrochemical Etching

Authors: Mohd Husairi Fadzilah Suhaimi, Maslihan Ain Zubaidah, Shamsul Faez M. Yusop, Rusop Mahmood Mohamad, Saifolah Abdullah

Abstract: This article reports on the electrical properties of porous silicon nanostructures (PSiNs) in term of its surface topography. In this study, the PsiNs samples were prepared by using different current density during the electrochemical etching of p-type silicon wafer. PSiNs has been investigated its electrical properties and resistances for different surface topography of PSiNs via current-voltage (I-V) measurement system (Keithley 2400) while its physical structural properties was investigated by using atomic force microscopy (AFM-XE100).

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Structural and Thermal Properties of ACNT by Modified Deposition Method: Growth Time Approach

Authors: Muhammad Salleh Shamsudin, Mohammad Maryam, Noor Asli Asnida, S.A.M. Zobir, Mohd Amri Johari, Shamsul Faez M. Yusop, Suriani Abu Bakar, Saifollah Abdullah, S.Y.S. Yahya, Mohamad Rusop

Abstract: The knowledge of fabrication method plays an important role in the preparation of aligned carbon nanotubes (ACNT) from natural hydrocarbon feedstock. Here ACNT were successfully synthesized by two-stage catalytic chemical vapor deposition method using organic oil (camphor oil) as a precursor. Synthesis was carried out at a fixed growth temperature of 800 °C and in different growth time: 10, 20, 30, 40, 50 and 60 minutes. The optimized condition for the growth of ACNT produced a small amount of by-product amorphous carbon and highly uniform crystal structure. The experimental results demonstrated that formation ACNT is also dependent on the growth time. The nanotubes were characterized by field emission scanning electron microscopy and micro-Raman spectroscopy. Thermal properties were evaluated by thermogravimetric analysis.