The key point is the water content of the membrane!

First immerse the membrane in ethanol (this will help water to penetrate into the pores); then soak it in water for a couple hours. Then wipe the surface water out and put the membrane in liquid nitrogen. You'll see it become brittle and easily broken.

Dr Nematollahzadeh

Thank you for the answer.

Best regards.

Khodadadi

We use ion beam polisher:

http://www.jeolusa.com/PRODUCTS/Sample-Preparation-Tools/Cross-Section-Polisher

Dear Ivaylo

Thanks for your answer. This Polisher is very interesting.

It is useful to make a scrape on the outer support surface by a surgical razor blade and then immerse it in liquid nitrogen. Break the sample from the support side.

Dr Kargari

Thanks for your answer.

Best Regards

Hello, are any of these methods applicable to polycarbonate membranes?

I am trying to obtain cross section images of nanowires grown inside PC membranes. Thank you all. Attached is an image from a template cut with a razor blade.