Author/Authors :
Sun، نويسنده , , L.F. and Liu، نويسنده , , Z.Q. and Ma، نويسنده , , X.C. and Zhong، نويسنده , , Z.Y. and Tang، نويسنده , , S.B. and Xiong، نويسنده , , Z.T. and Tang، نويسنده , , D.S. and Zhou، نويسنده , , W.Y. and Zou، نويسنده , , X.P. and Li، نويسنده , , Y.B. and Tan، نويسنده , , K.L. and Xie، نويسنده , , S.S. and Lin، نويسنده , , J.Y.، نويسنده ,
Abstract :
In this Letter, we report that after oxidation in air and reduction in hydrogen the existing carbon nanotube arrays can be used as a substrate to grow another nanotube array. The two arrays are connected through a thin catalyst layer. Micro-Raman study of these two nanotube arrays shows that they have different characteristic spectra. Besides the small shift in the peak frequencies of the two kinds of arrays in Micro-Raman spectra, we have observed changes in the relative intensities of D, G and D′ lines and proposed the mechanism of this phenomenon.
