The controlled deposition of metal oxides onto carbon nanotubes by atomic layer deposition: examples and a case study on the application of V2O4 coated nanotubes in gas sensing
authors Willinger, MG; Neri, G; Bonavita, A; Micali, G; Rauwel, E; Herntrich, T; Pinna, N
nationality International
journal PHYSICAL CHEMISTRY CHEMICAL PHYSICS
keywords SOL-GEL ROUTES; THIN-FILMS; NONAQUEOUS SYNTHESIS; VANADIUM-OXIDES; SENSORS; TEMPERATURE; OXYGEN; NO2; NANOCRYSTALS; ADSORPTION
abstract A new atomic layer deposition (ALD) process was applied for the uniform coating of carbon nanotubes with a number of transition-metal oxide thin films (vanadium, titanium, and hafnium oxide). The presented approach is adapted from non-aqueous sol-gel chemistry and utilizes metal alkoxides and carboxylic acids as precursors. It allows the coating of the inner and outer surface of the tubes with a highly conformal film of controllable thickness and hence, the production of high surface area hybrid materials. The morphology and the chemical composition as well as the high purity of the films are evidenced through a combination of electron microscopic and electron-energy-loss spectrometric techniques. Furthermore, in order to highlight a possible application of the obtained hybrids, the electrical and sensing properties of resistive gas sensors based on hybrid vanadium oxide-coated carbon nanotubes (V2O4-CNTs) are reported and the effect of thermal treatment on the gas sensing properties is studied.
publisher ROYAL SOC CHEMISTRY
issn 1463-9076
year published 2009
volume 11
issue 19
beginning page 3615
ending page 3622
digital object identifier (doi) 10.1039/b821555c
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000265854000003
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journal analysis (jcr 2019):
journal impact factor 3.43
5 year journal impact factor 3.735
category normalized journal impact factor percentile 69.267
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