Resumen de Covalent immobilization of glucose oxidase on well-defined polymer-silicon wafer hybrids via surface-initiated raft-mediated process
Jiayou Ji, Keqiang Xia, Tingting Liu, Liang Li
A surface modification technique was developed for the functionalization of silicon surface with glucose oxidase (GOD). The silicon surface was first graft copolymerized with glycidyl methacrylate (GMA) via surface-initiated reversible addition-fragmentation chain-transfer (RAFT)-mediated process. GOD was then covalently immobilized through the ring-opening reaction between the amine groups of the GOD and the epoxide groups of the grafted GMA polymer chains. X-ray photoelectron spectroscopy (XPS) was used to characterize the surface-modified surface after each modification stage. Increasing the thickness of the polymer layer and the immobilization time could allow a great amount of GOD to be immobilized on the silicon surface. The GOD-functionalized silicon hybrids are promising candidates for the silicon-based glucose biosensors.
