title: Hydrocarbon decomposition in alumina membrane: an effective way to produce carbon nanotubes bundles.
abstract: Carbon nanotubes were synthesised within the pores of an alumina membrane. The membrane had 200 nm diameter pores and 60 microm thickness, and ethylene was used as carbon source. Membrane dissolution by HF results in a bundle of parallel open tubes, aligned without macroscopic defects. The external diameter of the tubes is uniform and there is no evidence of any amorphous carbon. Wall thickness control was obtained by varying the reaction time, length by the thickness of alumina membrane, and external tube diameter by the membrane pore size. Scanning (SEM) and transmission (TEM) electron microscopy, atomic force microscopy (AFM), X-ray diffraction, thermogravimetric analysis (TG) and surface area evaluation by nitrogen adsorption were used for the characterization of membrane and nanotubes.
authors.affiliation: Department of Chemical and Food Engineering, University of Salerno, Fisciano (SA), Italy.
authors.forename: P
authors.initials: P
authors.lastname: Ciambelli
authors.forename: D
authors.initials: D
authors.lastname: Sannino
authors.forename: M
authors.initials: M
authors.lastname: Sarno
authors.forename: A
authors.initials: A
authors.lastname: Fonseca
authors.forename: J B
authors.initials: JB
authors.lastname: Nagy
mesh_terms: D000327:Adsorption; D000535:Aluminum / Q000737:chemistry*; D000537:Aluminum Oxide / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D003460:Crystallization; D005030:Ethylenes / Q000737:chemistry; D006838:Hydrocarbons / Q000737:chemistry*; D013058:Mass Spectrometry; D008422:Materials Testing; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013818:Thermogravimetry / Q000379:methods; D014961:X-Ray Diffraction
chemical_list: D005030:Ethylenes; D006838:Hydrocarbons; D037742:Nanotubes, Carbon; D002244:Carbon; C036216:ethylene; D000535:Aluminum; D000537:Aluminum Oxide; D009584:Nitrogen