Gasochromism

The term gasochromism has been applied to systems which change colour by redox reactions involving gases it is closely related to electrochromic behaviour. 

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Gasochromism is a colour change brought about by a gas (see also vapochromism). 

The structure and composition of tungsten oxide films prepared by RF magnetron sputtering and by pulsed laser deposition was examined using X-ray diffraction and ion beam analysis techniques. The correlation of the hydrogen in the film with the optical absorption characteristics was investigated to clarify the gasochromic mechanism. 

P. Liu, C. E. Tracy, J. R. Pitts, and S.-H. Lee, Protective Coating for Gasochromic-Based Sensors Used in Sensing the Presence of Hydrogen, ROI, NREL 01-41, application submitted. 

The preparation and characterization of vanadium oxide (V2O5) modified tungsten oxide (WO3) films by pulse laser deposition were recently examined [61]. Tungsten oxide coatings are used in many electro-optical applications including catalysts, solar cell windows, electrochromic and gasochromic devices, optical memory and... 

Ranjbar M, Mahdavi SM, Iraji zad A. Pulsed laser deposition of W-V-O composite films preparation, characterization and gasochromic studies. Solar Energy Mater Solar Cells 2008 92 878-83. 

Shanak H, Schmitt H, Nowoczin J, Ziebert C (2004) Effect of Pt-catalyst on gasochromic WOj films optical, electrical... 

It is also worthwhile to mention that gasochromic devices have been made by the sol-gel process (Georg, 2004) using WO3 layers prepared by the ion exchange or perox-opolytungstic acid method. 

Zayat, M. (1997) Photochromic, electrochromic and gasochromic glasses prepared by the sol gel method. PhD thesis, Hebrew University of Jerusalem. 

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