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Powders, Nanoparticles and Colloidal Dispersions
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Message Icon Topic: Peeling of TiO2 films Post Reply Post New Topic
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Joined: 15 November 2007
Location: India
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Posts: 12
Quote mehulmatrix Replybullet Topic: Peeling of TiO2 films
    Posted: 25 March 2008 at 3:18am
Hello All,
Im working on TiO2 films made by sol-gel method.
Im making them by 1) TTIP + Ethanol + HCL & 2) TTIP + Propanol + 2M HCL.
The sol is then spin-coated on the substrate(oxidized Si & glass) of dimensions 10mm x 10mm.
After spin coating once & annealing, some portion of the films are peeling off at the edges. spin coating done at 2000 rpm for 40 secs.
Also i went on to spin-coat an additional time, & this time after annealing the peeling increased towards the center aswell.
The peeling off was more prominent in 2nd method.
Not from chemistry or material background, so difficult to comprehend the reasons for the same!
Inputs from others will be really appreciated.

Thanks in advance!

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Joined: 29 August 2006
Location: Iran
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Posts: 16
Quote mnstd Replybullet Posted: 25 March 2008 at 3:41am
I suggest you to dilute your sol then spin coating it.

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