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The Effect of Titanium Nitride Thickness as a Support Layer for Carbon Nanotubes Growth

Ramli Muhammad M., Osman Nurul H., Darminto D., Abdullah Mohd Mustafa Al Bakri

Archives of Metallurgy and Materials

2022

Vol. 67, iss. 3

963--966

The effect of titanium nitride (TiN) thickness as the support layer for carbon nanotubes (CNTs) growth was investigated by depositing three different thicknesses: 20 nm, 50 nm and 100 nm. This TiN support layer was deposited on SiO2 pads before depositing nickel (Ni) as the catalyst material. The Ni distribution on different TiN thicknesses was studied under hydrogen environment at 600°C. Then, the samples were further annealed at 600°C in acetylene and hydrogen environment for CNTs growth. The results show that, the optimum TiN thickness was obtained for 50 nm attributed by the lowest D to G ratio (0.8).

Synthesis of SiO2 nanopowders containing quartz and cristobalite phases from silica sands

Munasir Z., Triwikantoro T., Zainuri M., Darminto D.

Materials Science Poland

2015

Vol. 33, No. 1

47--55

In this study, extraction and synthesis of SiO2 nanoparticles from silica sands have been conducted by means of two different methods, i.e. dry method (method 1) and hydrothermal process (method 2). The basic difference between the two methods is in the extraction step. The two methods were compared in terms of being more efficient, economical, and superior in obtaining SiO2 nanoparticles. The SiO2 nanoparticles were characterized in terms of phase purity, crystallinity, Si–O functional bonding as well as particles size and morphology. The most interesting fact in this study was the formation of both quartz and cristobalite phases within all prepared SiO2 nanoparticles.