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Abstract  

Modified carbon multiwall nanotubes were prepared via the oxidation process by means of 65% nitric acid or ferric nitrate dissolved with 65% nitric acid. Using special thermogravimetry and sorptometry methods physicochemical properties of pure and modified nanotube surfaces were investigated. A numerical and analytical procedure for the evaluation of total heterogeneous properties on the basis of liquid thermodesorption from the sample surfaces under the quasi-equilibrium conditions are presented. The calculations of the fractal dimensions of carbon nanotubes using the sorptometry and thermogravimetry data is presented.

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Acta Biologica Hungarica
Authors: Petra Varró, Imola Szigyártó, A. Gergely, Erika Kálmán, and Ildikó Világi

Belyanskaya, L., Weigel, S., Hirsch, C., Tobler, U., Krug, H. F., Wick, P. (2009) Effects of carbon nanotubes on primary neurons and glial cells. Neurotoxicology 30 , 702

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Journal of Thermal Analysis and Calorimetry
Authors: Eudes Lorençon, Rodrigo G. Lacerda, Luiz O. Ladeira, Rodrigo R. Resende, André S. Ferlauto, Ulf Schuchardt, and Rochel M. Lago

Introduction Carbon nanotubes (CNTs) have been intensely investigated due to their unique chemical, mechanical, and electrical behavior. The inherent properties of CNTs make them versatile supports for metallic nanoparticles

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Nanopages
Authors: Elena Burakova, Alexandr Melezhyk, Alyona Gerasimova, Evgeny Galunin, Nariman Memetov, and Alexey Tkachev

] Boncel S. , Koziol K. , Walczak K.Z. , Windle A.H. , Shaffer M.S.P. ( 2011 ) Infiltration of highly aligned carbon nanotube arrays with molten polystyrene . Mater Lett 65 2299 – 2303 . [3

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, the multi-wall carbon nanotube (MWNT) and the single-wall carbon nanotube (SWNT). A SWNT is a graphene sheet rolled into a cylinder with typical diameter on the order of 1.4 nm. However, a MWNT consists of several concentric cylinders with diameters

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Acta Physiologica Hungarica
Authors: Simona Clichici, T. Mocan, A. Filip, A. Biris, S. Simon, D. Daicoviciu, N. Decea, A. Parvu, R. Moldovan, and A. Muresan

20316 Biris AR, Dervishi E, Simon S, Lupu D, Misan I, Iancu C, Clichici SV, Xu Y, Watanabe F, Biris AS: Analytic studies of high quality singlewall carbon nanotubes synthesized on a novel Fe

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have already been discovered, although they are constantly being improved, and require massive amounts of basic nanomaterials such as multiwalled carbon nanotubes (MWNCTs), which means carbon nanotube (CNTs) 1 production capacity must be increased

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Journal of Thermal Analysis and Calorimetry
Authors: F. Xu, L. Sun, J. Zhang, Y. Qi, L. Yang, H. Ru, C. Wang, X. Meng, X. Lan, Q. Jiao, and F. Huang

Abstract  

Heat capacities of the carbon nanotubes (CNTs) with different sizes have been measured by modulated temperature differential scanning calorimetry (MDSC) and reported for the first time. The results indicated the values of C p increased with shortening length of CNTs when the diameters of CNTs were between 60 and 100 nm. However, the values of C p of CNTs were not affected by their diameter when the lengths of CNTs were 1–2 um, or not affected by the length of CNTs when their diameters were below 10 nm. The thermal stabilities of the CNTs have been studied by TG-DTG-DSC. The results of TG-DTG showed that thermal stabilities of CNTs were enhanced with their diameters increase. With lengths increase, the thermal stabilities of CNTs increased when their diameters were between 60 and 100 nm, but there is a slight decrease when their diameters were less than 60 nm. The further DSC analyses showed both released heat and T onset increased with the increase of CNTs diameters, which confirms the consistency of the results from both TG-DTG and DSC on CNTs thermal stability.

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Abstract  

The lattice specific heat in carbon nanotubes is evaluated within the microscopic model proposed by Mahan and Jeon, published in the Physical Review B, in 2004. Phonons are considered for single wall carbon nanotubes in armchair configuration. As expected, low temperature and high temperature regions show different behaviour of specific heat. Carbon nanotubes are also displaying a very interesting lattice transport depending on the tube diameter, with high thermal conductivities for small diameters.

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fracture toughness, is trying to be solved by adding carbon nanotubes (CNT). This is expected to improve the mechanical and thermal behaviour of the epoxy resins, increasing also their electrical conductivity [ 1 – 3 ]. However, in the last years, it was

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