Fritz-Haber-Institut / Inorganic Chemistry |
|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, Marc-Georg; Neri, Giovanni; Bonavita, Anna; Micali, Giuseppe; Rauwel, Erwan; Herntrich, Tobias; Pinna, Nicola|
|Date of Publication (YYYY-MM-DD):||2009-03|
|Title of Journal:||Physical Chemistry Chemical Physics|
|Journal Abbrev.:||Phys. Chem. Chem. Phys.|
|Copyright:||© Royal Society of Chemistry 2009|
|Abstract / Description:||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.|
|Free Keywords:||atomic layer deposition; nanotubes, carbon;|
|External Publication Status:||published|
|Communicated by:||Robert Schlögl|
|Affiliations:||Fritz-Haber-Institut/Inorganic Chemistry/Micro- and Nanostructure / Carbon|
|External Affiliations:||Department of Chemistry, CICECO, University of Aveiro, Aveiro, 3810-193, Portugal.
Department of Industrial Chemistry and Materials Engineering, University of Messina, Contrada di Dio, Vill. S. Agata, 98166, Messina, Italy.
World Class University (WCU) program of Chemical Convergence for Energy and Environment (C2E2), School of Chemical and Biological Engineering, College of Engineering, Seoul National University (SNU), Seoul, 151-744, Korea
|Identifiers:||URL:http://dx.doi.org/10.1039/b821555c [only for subscriber] |
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