磁性纳米Fe_3O_4颗粒掺杂多壁碳纳米管修饰的葡萄糖生物传感器

Glucose biosensor based on magnetic nanoparticle Fe_3O_4 mixed multi-walled carbon nanotubes modified glass carbon electrode

磁性纳米Fe3O4颗粒掺杂多壁纳米碳管混合分散于壳聚糖中,得到壳聚糖胶质液.将其修饰到玻碳电极表面,通过交联剂戊二醛固定葡萄糖氧化酶,制得一种新型的传感器.该传感器在pH=6.8的磷酸盐缓冲溶液中,对葡萄糖的线性响应范围为1.0×10^-5-2.3×10^-2mol/L,响应时间5.3 s.

The magnetic nanoparticle Fe3O4 and multi-walled carbon nanotubes （MWNTs） were solubilized in aqueous solution of a biopolymer chitosan （CHIT）. A new biosensor was made by the intermixture decorated on the surface of the glassy carbon electrode to fix the glucose oxidase（GOD） with glutaraldehyde. InPBS（pH=6.8）, the linear dependence current of the biosensor was in the range of 1.0×10^-5-2.3×10^-2 mol/L, the response lime was 5.3 s.