Dear, I would like to know if anybody know or could recommend method for controlling surface coating of polymeric membranes?
As Ruckert et al (2002) and Titirici and Sellergreen ( 2006) report, controlled/living radical co-polymerization is a feasible process to achieve a superior relationship between imprinted efficiency and binding capacity.
I am wondering do you have experience or you can share insight for controling of such a processes or any other surface modification that can measure amount of substance coated ( this substance can be, copolymer, biopolymer, enzyme, protein...etc)
Make a calibration curve (e.g. time dependent deposition) analyzing the cross-sections of your samples afterwards in SEM/TEM or using ellipsometry.
Trying various polymer solutions to be coated on the substrate, and then measuring the dried film thickness.
I dont understand how eigen frequencies and gravimetric analysis is connected?
Eigen frequences of membrane depend on mass, which it has collected. May be I have used term gravimetry not correctly.
It is standard electronics, different in different frequency's ranges.
Excuse. I am not specialist in electronics. I am theoretician. I know only general principles.
Hello
If the coated layer is chemically different from the membrane (which I suppose will be in your case) and if it has a thickness of at least several micrometers, you can use confocal Raman microscopy. Advanced instruments have depth resolution around 2 microns (maybe even better) and enable depth profilling, so you could even study multi-layer films. This is quite a nice model application, so I believe you can find more information from manufacturer brochures (e.g., Renishaw or Thermo-Scientific).
Regards
Josef
Hey Josef, thank you. No, my layer will be only 20 nm thin maximum 80 nm if i cannot control it
hey @chen We have ellipsometer on our department but I never use it, can you recommend me some good peper?
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