Graphene-nanocomposites

G. Williams, B. Seger, P. V Kamat, Ti02-graphene nanocomposites. UV-assisted photocatalytic reduction of graphene oxide, ACS Nano, 2 (2008) 1487-1491. 

Baek, S., et ah, A one-pot microwave-assisted non-aqueous sol-gel approach to metal oxide/graphene nanocomposites for Li-ion batteries. RSC Advances, 2011.1(9) p.1687-1690. 

Wu, C.-H., et al., Unique Pd/graphene nanocomposites constructed using supercritical fluid for superior electrochemical sensing performance. Journal of Materials Chemistry, 2012. 22(40) p. 21466-21471. 

Hu et al. showed a decrease in electrical resistivity of PVA by four orders of magnitude with a percolation threshold of 6 wt% [68], while biodegradable polylactide-graphene nanocomposites were prepared with a percolation threshold as low as 3 5wt% [46]. For polystyrene-graphene composites, percolation occurred at only 0.1 °/o of graphene filler, a value three times lower than those for other 2D-filler [69]. Figure 6.7(b) shows the variation of conductivity of the polystyrene-graphene composite with filler content. A sharp increase in conductivity occurs at 0.1 % (the percolation threshold) followed by a saturation. The inset shows the four probe set up for in-plane and trans-... 

WiUiams G, Seger B, Kamat PV (2008) Ti02-graphene nanocomposites UV-assisted photo-catalytic reduction of graphene oxide. ACS Nano 2 1487-1491... 

Graphene is considered bidimensional carbon nanofiller with a one-atom-thick planar sheet of sp -bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It is regarded as one of the thinnest materials with tremendous application potential. Graphene and poly-mer/graphene nanocomposites have remarkable properties, among these ... 

Xu, K., Chen, G., Qiu, D., 2015. In situ chemical oxidative polymerization preparation of poly(3,4-ethylenedioxythiophene) /graphene nanocomposites with enhanced thermoelectric performance. Chem. Asian). 10,1225-1231. 

Polymer-graphene nanocomposites as ultrafast-charge and -discharge cathodes for rechargeable lithium batteries. Nano Lett. 12,2205-2211. 

Xiao, Y. H., Y. B. Cao, Y. Y. Gong et al. 2014. Electrolyte and composition effects on the performances of asymmetric supercapacitors constructed with Mu304 nanoparticles-graphene nanocomposites. Journal of Power Souwes 246 926-933. 

Lian, R, Zhu, X., Xiang, H., Li, Z., Yang, W., and Wang, H. [2010], Enhanced cycling performance of Fe304-graphene nanocomposite as an anode material for lithium-ion batteries. Electrochim. Acta, 2, pp. 834-840. 

Hu et al. showed the preparation of highly porous nanorod-PANI-gra-phene nanocomposite films deposited onto the ITO substrate by in-situ electrochemical polymerization [135]. They used a reverse micelle technique by mixing oil and water in an aqueous solution of TritonX-100. The electro-migration of the ionic species is improved by the addition of dilute HNOj to the oil-water-surfactant solution followed by the polymerization of aniline monomer in presence of graphene dispersion. Figure 4.12 shows the schematic for the preparation of nanorod-PANI-graphene nanocomposites by reverse micelle in-situ electropolymerization technique. 

UV-Vis spectroscopy [32]. The transparency of stacked graphene is much lower than that of the monolayer graphene. Ferrari et al showed that the optical absorption of graphene layers is proportional to the number of layers, absorption A 1-T Tta 2.3% [8]. Therefore, analysis of UV-Vis results provides a tentative idea about graphene formation and the number of layers. Figure 4.23 shows the UV-Vis absorption spectra of pure PANI and PANI/graphene nanocomposites [122]. 

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