Central Glass and Ceramic Research Institute, India
Posters & Accepted Abstracts: J Material Sci Eng
A new generation composite has been synthesized by impregnating SWCNT in oxide glass matrix using melt-quench technique. Current-Voltage relationship was studied with different temperatures and the electrical conductivity was found to increase significantly with the increase in temperatures. The activation energy of the composite was determined by Arrhenius analysis and found to be significantly low. Microstructural analysis of the composite by SEM, FESEM and TEM clearly shows the random orientations of the bundles of nanotubes throughout the glassy host. TEM micrographs show wonderful alignment of nanotube inside the bundles. The charge transport phenomena of the composite was analyzed by using variable range hopping (VRH) and fluctuation induced tunneling (FIT) model. It was found that the charge conduction through the composite was well explainable by the FIT model. Moreover an interesting optical property of this composite has been observed where one can see strong near infrared fluorescence from Single walled carbon nanotube-borosilicate glass composite around 0.84-2.03 ├?┬╝m with 325 nm laser excitation. Band gap fluorescence of SWCNT bundles along with defect related fluorescence from SiO2 structure were the source of the NIR emissions of the composite. Finally researchers are looking for new class of materials having high mechanical resistance, low density and microwave attenuating properties for different structural applications. All these properties are well established in this composite thereby making it one of the versatile materials for conductor-insulator interface device coupled with broadband fiber optic telecommunications , fabrication of NIR tunable lasers and high end structural application.
Journal of Material Sciences & Engineering received 3043 citations as per Google Scholar report