Table 3.

Fabrication techniques used to prepare porous membranes for OOCs.

fabrication technique	polymer
soft lithography	PDMS [1,6,7,10,11,13,18,19,38,42,47]
	PEG-DA [52]
	PLA [33]
track etching	PC [4,5,8,9,16,23,25,27,29,41,43,44,51]
	PET [2,15,21,23,26,28,39,48,53]
injection moulding in a microfluidic chip with micropillars	PDMS [52]
	PUA [52]
electrospinning	PCL [34]