A) Chemistry schematic of the NGF immobilization process using azido chemistry. PAA was conjugated to an azido compound (PAA-azido). This conjugate was cast twice on PPy, followed by casting of NGF. UV light exposure promoted the formation of covalent bonds via the azido groups, immobilizing NGF to PPy. Reproduced from reference [38], Copyright (2006), Wiley.
B) Chemical schematic of thiolization of NGF and subsequent conjugation to the PEO-PPO-PEO linker. Reproduced from reference [109], Copyright (2005), Koninklijke Brill NV.