Hi All,
Normally when we are preparing the PDMS, we usually use Si as mold . Assume that you fabricate your PDMS mold in 3D-Printer instead of patterns on Si fabricated by SU-8 . Do you think that it negatively leads to bonding of PDMS-Glass because of the surface roughness of PDMS pilled off from 3D-printed mold ? Which type of mold for obtaining PDMS is the good for glass-pdms bonding? If you have any experiences about 3D-printed mold for PDMS, would you share us ?
The second question is that Oxygen/air plasma cleaning or RF etch is widely used to make PDMS blocks stickable on to glass. Is there any other way to achieve the same?
Third Question is that lets say that you remove PDMS from your chip. Then, if you want to clean it, which type of solvent should be used or prepared to clean PDMS dirtiness?
Sincerely,
Osman
3D printed mold will be rough and it will definity affect your PDMS-Glass bonding.
3rd Question - If there is a slight amount of dirt on the PDMS after you remove it from the mold, the best way to remove that is by using scotch tape.
Abhishesh Pal thank you for your answer. If the surface of the chip is dirty after PDMS peeling off, which type of solvent, except acetone, can be used to clean the sensor?
this paper may inerest you: Reza Ghaemi et al 2018 J. Micromech. Microeng. 28 087001 DOI 10.1088/1361-6439/aabd29
Use of flame activation of surfaces to bond PDMS to variety of substrates for fabrication of multimaterial microchannels
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