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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. The fabrication of large area thin films of single wall carbon nanotubes ͑SWCNTs͒ using electrostatic layer-by-layer deposition is reported. The in-plane current versus voltage ͑I-V͒ characteristics were dependent on the concentration of SWCNTs transferred from the solvents onto the substrates. Solutions with a low SWCNT concentration produced films that exhibited a nonlinear I-V regime. The experimental data fitted with various conduction models indicated that PooleFrenkel conduction was the dominant mechanism. The temperature dependence of the conductivity also supported this model. Two activation energies were identified-approximately 10 and 20 meV. These were thought to be associated with the surfactant coatings of the nanotubes. Increasing the SWCNT loading in the thin films led to an Ohmic conduction process by virtue of a denser network of conductive paths in the film and conduction via tube to tube contacts.

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Carbon nanotubes (CNTs) are ideal support materials for platinum in fuel cells. However,l ittle is known about the conduction mechanism of Pt-coordinated CNTs. Herein, ac oordination complexo fp yridine-functionalized singlewalled nanotubes (Py-SWNTs) with Pt (Pt/Py-SWNTs) was prepared via the ligand exchange reaction between cis-[Pt(dmso) 2 Cl 2 ]a nd Py-SWNTsg enerated by pyridine diazonium salt addition to SWNTs. The presence of Pt in modified SWNTsw as confirmed by X-ray photoelectron spectroscopy (XPS). The N1 sX PS spectra provided evidence of Pt coordination to the pyridine nitrogen atom. Modified SWNTsw ere furtherc haracterized by thermogravimetric analysisc oupled with mass spectrometry,u ltraviolet-visible-near infrared spectroscopy,R amans pectroscopy,a nd elemental analysis. The electron conduction mechanism of Pt/Py-SWNT films was bestd escribed by am odified quantum tunneling model,i dentified from ac ombined analysis of the voltage and temperature dependence of the current.