I need to deposit layers of CYTOP on glass slides and I plan to use spin coating method. How do I make sure the layers have formed a uniform coating?
Hello
The most important factor in controlling the thickness and the homogeneity of the layers by spin coating is the spinning velocity.
For that I advice you to read the literature about your material viscosity or to check it by rheology measurements.
For example, if you spin a viscous material and a low viscosity one at the same speed, the first one will be thicker and not as dispersed as the low viscosity one.
For that, check the material viscosity (if it's too high, spin it at higher speeds). By that you can extend the layer on the glass slides. If you are using a polymer dissolvant, check it's viscosity. The main factor in layers homogeneity comes from that.
Good luck
Regards
Loraine
As Loraine Youssef said, you can control the thickness of your sample by playing with RPM of your spin coater and viscosity of your sample.
To confirm your uniform/smooth coating I would suggest you to go for AFM and check your glass substrate. You will be able to get the topology and phase difference of your coating on the glass slide. Also you don't need to bother about the conductivity of your coating.
Good luck with your work!!!
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