铂纳米颗粒修饰直立碳纳米管电极的葡萄糖生物传感器

Glucose Biosensor Based on Pt Nanoparticles Modified Aligned Carbon Nanotubes Electrode

基于Pt纳米颗粒修饰直立的碳纳米管电极制备了葡萄糖生物传感器.铂纳米颗粒是利用电位脉冲沉积法修饰到直立碳纳米管上的,可以增强电极对酶反应过程当中产生的过氧化氢的催化行为.用扫描电镜和透射电镜观察了直立碳纳米管在修饰Pt纳米颗粒前后的形态.该酶电极对葡萄糖的氧化表现出很好的响应,线性范围为1×10-5～7×10-3mol/L,响应时间小于5s,并且有很好的重现性.

A sensitive amperometric glucose biosensor based on Platinum（Pt） nanoparticles modified aligned carbon nanotubes（ACNTs） electrode was investigated. Pt nanoparticles which could enhance the electrocatalytic activity of the electrode for electrooxidating hydrogen peroxide produced with enzymatic reactions were electrocrystallized on 4-aminobenzene monolayer-grafted aligned carbon nanotubes electrode with a potential-step method. These Pt nanoparticles modified ACNTs surfaces were characterized with scanning electron microscopy （SEM） and transmission electron microscopy（TEM）. The nano-scale Pt particles dispersed highly on ACNTs can be obtained. The enzyme electrode exhibitsan excellent response performance to glucose with a linear range from 1×10^-5 to 7×10^-3 moL/L and fast response time within 5 s. Furthermore, this glucose biosensor also has a good reproducibility.