Author/Authors :
Ammar Elsanousi، نويسنده , , Jun Zhang، نويسنده , , H. M. H. Fadlalla، نويسنده , ,
Feng Zhang، نويسنده , , Hui Wang، نويسنده , , Xiaoxia Ding، نويسنده , , Zhixin Huang، نويسنده , ,
Chengcun Tang، نويسنده ,
Abstract :
The effect of ammonium fluoride (NH4F)
concentration on the dimensions (length, diameter, and
wall thickness) of the self-organized nanotube arrays has
been investigated. Results show that varying the concentration
of NH4F exerts a strong effect on changing the
dimensions of the as-grown nanotube arrays. The length of
the nanotube arrays increases gradually by increasing the
concentration up to a maximum length at a concentration
of 1.00 wt%, after which the length decreases slightly with
the increase in NH4F concentration. It was also observed
that the diameter and wall thickness of the nanotube arrays
vary with the change in concentration of NH4F, where the
diameter was found to alter between 80 and 140 nm, and
the wall thickness decreases by increasing the NH4F concentration.
These results indicate that it is possible to
entirely control the dimensions of the nanotube arrays, by
tailoring the concentration of NH4F besides the anodization
time and voltage.
