2d 25Grilamid® 2D 25 W 20 HL X black 9992Polyamide 612 Copolymer (Nylon 612),. ,,,,: .2D materials off their growth substrates and releasing them onto the target substrates19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35.