I have deposited on glass surface SrTiO3 . I want to deposit TiO2 over it via spin coating for further studies . Will I observe any difference in properties ?
or Can I use this substrate for sensing properties ?
Use of coating of TiO2 has a corrosion inhibitor property . Only difference is the cost of TiO2 being higher. However, durability is good. So you can use instead of SrTiO3 .
There are some works relating Titanium dioxide thin films cristallinity dependance on substrates.
Fact is, thin films have a huge surface area, even though they have a smaller volume, so they change a lot their properties on casting. For example, sodium glasses are well known to reduce TiO2 thin films photoactivity, cristallyne substrate can induce certain planes of TiO2 to grow preferentially. Specifically the SrTiO3 I don't know how it will affect, even because I don't know the thickness of your SrTiO3 covering, but it will probably make difference when compared to a bare glass. If I were you, I'd the study using the bare glass and the glass covered, to mantain a control group!
The most important parameters affecting the efficiency of catalysts for the oxidation of the surrounding materials are considered to be the thickness and uniformity of the catalyst layer. The present method for the determination of thickness used in most studies is the analysis of cross-sectional pictures from SEM imaging. This method, however, has several restrictions. This study proposes a feasible and simple method for evaluating the optimal thickness and uniformity using UVA light transmitted through the samples. Three techniques for catalyst deposition have been investigated in this study using UVA light transmitted through the samples and by measuring the photocatalytic activity. These methods include lowering, dip coating, and spraying, which showed coefficients of variation for the coated catalyst weight of 28.4%, 13.6%, and 3.24%, respectively. The samples from the lowering, dip coating, and spraying techniques showed UVA transmissions of 95.02%, 68.8%, and 15.6%, respectively. The spraying technique displayed the lowest values for both. The estimated removal efficiencies (%RE/mgcm−2) for lowering, dip coating, and spraying were 18.42, 16.84, and 24.15, respectively. Using these analyses it was determined that the spraying technique yielded the best photocatalytic oxidation performance of the three techniques studied.
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