Covalent functionalization of single-walled carbon nanotubes with anthracene by green chemical approach and their temperature dependent magnetic and electrical conductivity studies
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Date
2013-10-15
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VIT University
Abstract
Single-walled carbon nanotubes (SWCNTs) were covalently functionalized with anthracene in molten
urea by a green chemical approach. The anthracene functionalized single-walled carbon nanotubes (Antf-SWCNTs) were examined along with SWCNTs, using Fourier transform infrared spectroscopy (FTIR),
Raman spectroscopy, powder X-Ray diffraction (XRD), and scanning, and transmission electron microscopy. The observations revealed the functionalization of SWCNTs by anthracene. The temperature
dependent magnetization (300e5 K) and electrical resistivity were also measured for both SWCNTs and
Ant-f-SWCNTs. The electrical resistivity of Ant-f-SWCNTs at 300 K was found to be 1.27 KUm, which is
much lower than 388.55 KUm for pristine. This indicated a 300 fold increase in conductivity at room
temperature for Ant-f-SWCNTs when compared to SWCNTs. The temperature dependence of the conductivity provided an indication of the semiconducting behaviour.